PMDX-120 Parallel Port Accessory Module User`s Manual
Contents
1. NOTE 5 The character at the beginning of some ofthe signal names indicates a signal that is active low measured at the PC s 25 pin D connector when connected to a printer The PMDX 120 does not necessarily use the polarity implied by the signal names Refer to sections 2 3 and 2 5 for information on PMD X 120 signal polarities 7 0 Mechanical Specifications 5 900 5 550 b E 4 each 0 150 dia holes for 6 screw a 3 300 mr Figure 8 PMDX 120 Dimensions and Mounting Holes 8 0 Electrical and Environmental Specifications AC Power 110 to 120 VAC 50 60 Hz 6 W atts max input via J8 or 7 to 9 VAC at 300mA 50 60 Hz input via J13 Relay O utputs 10 Amps at 120 VAC or 5 Amps at 230VAC or 5 Amps at 50VDC Contact Closure Inputs The PMDX 120 supplies approximately 12 VDC with an open circuit and will source up to 20 mA max to each contact closure pin when connected to the common return Sense Input 1 0 mA at 3 0V minimum to assert the Sense input 0 mA to de assert the input 7 0 VDC absolute maximum input voltage PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 18 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PC B 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 Step amp Direction Typical output high 4 3V at 16 mA per signal see note below O utputs Typi2. idee 5 211 Step and Direction Buffer ap GAGANA NGANGA t cer t d d eee 5 2 1 2 Common Voltage Reference eene nitent ttti ttti ni ttti tinto 5 2 1 3 Step Output Polarity Contro soit Manette ae aos 6 2 1 4 Direction QUtput P0larity kalagan naaa ANNA NANA tae ente tinct es 6 2 1 5 Parallel Port Step and Direction Mapping 6 2 1 6 Auxiliary O t DUts KN ana tte teen tte te nee IN tet e ree aids 6 2 2 Sense Auxiliary InpUE sssescssescsssessssssssesssssssssessuscssuscssvscssvecssssssssessssessssessusessusessusessuscssvecsssessssecsssessssessess 6 221 Use W ith Gecko 300 Series Fault Signal 6 2 2 2 Use W ith General Purpose Logic Signals seen 7 23 Contact C losure Inputs ee eerte iret tette eo tede ien tr c te edd 7 231 Contact Closure LED at irte rere rne en cene tocca b cc tr e ic orc 7 2 3 2 Contact Closure and Sense Inputs ulanan anasasa nasasama annsasananana nananana 7 24 Auxilary 5 Volt DC QUEUE i d rtt ritiene ene e rre tee entendi 7 2 5 Relay O UEDUES eee retener tet Ee e rin eee ed ee elec aaia 8 2 0 7 AC TI eT Ain sa ina e 0A ia 8 2 6 1 Line Voltage Power InpUE ea unite ien e Pei Pei heo nti 8 2 6 2 Alternate Low Voltage Power Input tnnt 8 na PEC Parallel POFt acu e e de eed ed dre ire te dede 8 3 0 Miscellaneous cr 9 Sd Activity WED aaa a Banda Ana pA a etti mtt es 9 3 2 ROWE AA 9 4 0 DIP Switch liie X 9 41 Step Direction Mapp
3. to PC Status contact closures Minimum output high 2 4V at 4 0 mA per signal Maximum output low 0 4V at 8 0 mA per signal Environmental Temperature 0 to 70 C Relative Humidity 2096 to 8096 relative humidity non condensing PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 19 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 Appendix A Warranty Statement Practical Micro Design Inc PMD warrants that this hardware product is in good working condition according to its specifications at the time of shipment for a period of 90 days from the date it was shipped from PMD Should the product in PMD s opinion malfunction within the warranty period PMD will repair or replace the product without charge Any replaced parts become the property of PMD This warranty does not apply to the software component of a product or to a product which has been damaged due to accident misuse abuse improper installation usage not in accordance with product specifications and instructions natural or personal disaster or unauthorized alterations repairs or modifications Limitations All warranties for this product expressed or implied are limited to 90 days from the date of purchase and no warranties expressed or implied will apply after that period All warranties for this product expressed or
4. 5 Terminology W hen describing voltage levels for the step direction contact closure inputs and relay outputs the voltages are referenced to the PC s 25 pin D parallel port connector This document uses the following terms Logic low Logic high Rising edge Falling edge 1 6 Updates to this Manual less than or equal to 0 7V also referred to as 0 greater than or equal to 24V also referred to as 1 transition from logic low to logic high transition from logic high to logic low Check the PMDX web site for revisions or updates to this manual http www pmdx com The latest revision of this manual will be available on the PMDX 120 page follow the links from the main page PMDX 120 Manual 16 doc 18 January 2007 2002 2007 Practical Micro Design Inc All Rights Reserved Page 4 of 20 PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 2 0 Connectors Motor Axis 1 Motor Axis 2 Motor Axis 3 J4 Motor Axis 4 or Auxiliary outputs 26 pin header optional alternative PC Parallel Port connection requires a header to 25 pin D connector ribbon cable not supplied with the PMD X 120 12 6 pin header factory use only J Alternate power supply input 7 to 9 VAC Auxiliary 5 VDC output Table 1 Summary of PMDX 120 Connectors 2 1 Motor Axis The PMD X 120 supports four pairs of step direction outputs These appe
5. PMDX 120 Parallel Port Accessory Module User s Manual Iz 844224211141 E a Ciao ES bys rarer a E 9s SUU Cas 4 EE CUm ae um 8 es lc mu ae JU S an J CUM 99 rU e Jota CUm E pu mi PP sf Tes 3 Te i i ngaa poe xL i dir r gt PEL dd ipa j mp Nag mel peak war O re A P Led Nhe dr em Lit Oe il o ope 9G 9 0d Document Revision 1 6 Date 18 January 2007 PCB Revision PCB 398B Serial N umber 22634 and above Logic Revision 1 5 PMDX 9704D Gunston Cove Rd Lorton VA 22079 2366 USA 1 703 372 2975 1 703 372 2977 FAX Web http www pmdx com PMDX 120 Manual 16 doc 2002 2007 Practical Micro D esign Inc Page 1 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 Table of Contents LO oz 3 11 Important Safety Information ulanan nanana anasananasana nanasa nnsnsanasasa nananana 3 l2 M grranty SUumltmar yz orent NGANGA NN aaah 3 1 35 SSPCGCINGALIONS kaan AN Nah anna ann NAA DoD NA KANA nha apan ru 4 14 Grounding and Isolation teet NA BANANA NA dtt de dede 4 l5 Terminology coe eee eroe e dee ia iere p deam a e cr e P i DR RR 4 1 6 Updates to this Manual ec ree recle inen ien rem Gr vc lnc tend an bi 4 2 0 Connectors X 5 2X MOTON AXIS i sodio e go e og ei igi ee d p t ABG
6. PMDX 120 is in any test mode This means that the PC could activate unwanted or dangerous features while you are working on the machine Unless you specifically need to interact with the PC you should disconnect it from the PMDX 120 board while working with test modes WARNING Changing the DIP switch mode setting while the PMD X 120 is powered on may l l cause spurious step pulses See the warning in section 4 0 DIP Switch Settings PMDX 120 Manual 16 doc 2002 2007 Practical Micro D esign Inc Page 14 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 5 3 Demo Mode Demo mode provides a stand alone hands off motion sequence as follows all steps are at approximately 100 Hz 1 1024 steps on axis 1 J1 and 3 J3 with direction 0 2 1024 steps on axis 2 J2 and 4 JA with direction 0 3 1024 steps on axis 1 J1 and 3 J3 with direction 1 4 1024 steps on axis 2 J2 and 4 JA with direction 1 The entire cycle lasts approximately 30 seconds It starts when the push button is pressed and continues to run until the button is pressed again W hen you halt the D emo mode motion by pressing the push button the PMD X 120 remembers the current position as long as the DIP switches remain set to Demo mode If you then press the button again to re start the Demo motion it will pi
7. S N 22634 and above Document Revision 1 6 Logic Revision 1 5 2 2 2 Use With General Purpose Logic Signals The sense input can also be used with any logic signal that provides a logic high output between 3 0V and 7 0V and can source at least 1 0 mA at this voltage Connect the sense pins as follows e sense pin to the logic output e sense pin to the logic ground note that this is isolated from the PMD X 120 s ground though the user may tie the sense pin to the common ground if necessary 2 3 Contact Closure Inputs The PMDX 120 supports five optically isolated contact closure inputs These inputs appear on connector J6 and are labeled A through E They are also labeled with the PC parallel port pin number to which they are connected these pin numbers are on the 25 pin D connector on the PC not the 36 pin Centronics connector on the PMDX 120 J6 also provides two return pins labeled com on the circuit board These return pins are common to all five inputs but isolated from PMD X 120 ground The contact closure inputs are routed through the PMD X 120 to the status pins on the PC parallel port connector The polarity of each input as presented to the PC parallel port can be selected via DIP switches see section 4 4 Contact Closure Polarity The contact closure inputs are designed for relatively slow signals with pulse widths in the millisecond range such as switch inputs Th
8. Switch O n generates a positive pulse triggered on onlonlof the rising edge of the incoming step pulse Off fe 1 generates a negative pulse triggered on the falling edge of the incoming step pulse Dir Latch Disabled Direction signal not modified not latched onloflon Step Regen Disabled Step signal not modified not regenerated s 2 Dir Latch Enabled Latched on rising edge i incoming step rio on of of ig a Dir tarch tated racnecen alingedgeorismingsepsga Fig 3 Dir Latch Enabled Latched on falling edge i incoming step sg Fig 4 Dir Latch Enabled Latched on rising edge of incoming step signal Regenerated from falling edge of incoming step signal Fig 5 Dir Latch Enabled Latched on rising edge of incoming step signal Regenerated from rising edge of incoming step signal Fig 6 Dir Latch Enabled Latched on falling edge of incoming step signal Regenerated from falling edge of incoming step signal Fig 7 Dir Latch Enabled Latched on falling edge of incoming step signal Table 4 Step and Direction Conditioning Mode DIP Switch Settings PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 11 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 Step In Step In Dir In Dir In Step Out Step Out Dir Out Dir Out Step Output Polarit
9. ar on connectors J1 J2 J3 and J4 Each connector has three pins labeled step dir and com The common pin com provides a voltage reference to all four axes This voltage reference can supply 5V power to the motor driver opto couplers Jumper JP1 determines the voltage reference provided to the com pins See section 2 1 2 Common Voltage Reference for more information 2 1 1 Step and Direction Buffer The step and direction outputs are driven by a 74AC T254 buffer These signals are NOT optically isolated since the motor driver normally has isolated inputs The buffer IC provides a nominal 0 to 5V output swing see section 8 0 for electrical specifications The buffer IC is in a socket and therefore user replaceable should you experience any mishaps Make sure to replace the IC with another 74ACT254 You may also use an LS or F part though the output drive will change from that listed in section 8 0 2 1 2 Common Voltage Reference The step and direction connectors provide a common voltage reference for all four axes i e the same reference voltage appears on all four connectors Jumper JP1 located just above J1 determines this voltage reference as follows e Setting the jumper on the two pins closest to J1 selects 5V as the common reference This configuration is commonly used when the motor drivers have optically isolated inputs and expect a pull down or open collector drive signal In this case t
10. cal output low 0 36V at 16 mA per signal see note below referenced to PMD X 120 ground Regenerated step pulses have a nominal pulse width of 5 us for step rates below 40 KHz For step rates above 40 KHz the regenerated pulses shorten to maintain an approximate 3396 duty cycle logic high for one third of period logic low for two thirds NOTE The PMDX 120 ships with a 74ACT254 buffer IC driving the step and direction outputs The typical output high and typical output low specifications take into account the operating environment provided by the PMD X 120 as well as the typical performance data from the 74ACT254 application notes These typical values are valid over the entire operating temperature range as specified below The guaranteed specifications over temperature and power supply variations are as follows Minimum output high 3 76V at 16 0 mA per signal Maximum output low 0 44V at 16 0 mA per signal WARNING Do not substitute other variants of the 74xx245 family as they may not be compatible with signals internal to the PMD X 120 board Aux 5VDC Output 50mA maximum PC Parallel Port Input thresholds from PC to PMDX 120 Data step direction Minimum input high 2 0V Maximum input high 5 5V Maximum input low 0 8V Control relay outputs Minimum input high 2 4V turns on the relay Maximum input high 5 5V Maximum input low 0 8V turns off the relay O utput Thresholds from PMDX 120
11. ck up where it left off If you exit Demo mode by changing the DIP switches and then re select Demo mode the motion starts with step 1 as described above In Demo mode the Step Regeneration function is disabled regardless of the DIP switch settings The Direction Latch function still operates according to the DIP switch settings WARNING The PC can still read the contact closure inputs and control the relay outputs when the PMDX 120 is in any test mode This means that the PC could activate unwanted or dangerous features while you are working on the machine Unless you specifically need to interact with the PC you should disconnect it from the PMDX 120 board while working with test modes PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 15 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 6 0 Connector Pin Outs This section lists all of the PMDX 120 connectors and their connections For all connectors pin 1 is the pin closest to the reference designator i e J1 pin 1 is the pin closest to the J1 text on the circuit board Also all connectors have square pads on pin 1 look on the bottom of the circuit board Pin Function y Step output may also be Aux 2 output on J4 Direction output may also be Aux 1 output on J4 Common reference output 5V or GND acc
12. erial N umber Range 22634 and above Logic Revision 1 5 marked on a label on the top side of the board 1 4 Important Safety Information The PMDX 120 is intended for integration by the purchaser into industrial control systems It is solely the purchaser s responsibility to assure that the system is configured in a manner consistent with applicable safety requirements Practical Micro D esign Inc does not control how this board is integrated into the purchaser s system and cannot be responsible for guaranteeing the safety of your system The PMDX 120 is not guaranteed to be fail safe The system into which the PMD X 120 is installed should provide fail safe protection and emergency stop capability The PMDX 120 contains circuitry that may be connected to dangerous voltages Care must be taken that users cannot come in contact with these voltages An enclosure that allows for modest ventilation but prevents intrusion by operator s hands and foreign objects especially conductive byproducts of machining operations should be utilized with this board Interlock switches on power circuits should remove power when the enclosure is opened Automated machine tools into which the PMD X 120 may be integrated can cause injury Precautions should be taken to assure that operators are trained in their proper operation and safety procedures and that they are protected from moving parts that may be under remote control and may move unexpectedly Thi
13. es In Single Step mode the Direction Latch and Step Regeneration functions are disabled regardless of the Step and Direction Conditioning Modes DIP switch settings WARNING The PC can still read the contact closure inputs and control the relay outputs when the PMDX 120 is in any test mode This means that the PC could activate unwanted or dangerous features while you are working on the machine Unless you specifically need to interact with the PC you should disconnect it from the PMDX 120 board l while working with test modes WARNING Changing the DIP switch mode setting while the PMD X 120 is powered on may cause spurious step pulses See the warning in section 4 0 DIP Switch Settings 5 2 Multi Step Mode In Multi Step mode the PMD X 120 generates step pulses on all four axes simultaneously with a pulse rate of approximately 100 Hz for as long as the SW 2 button is pressed The board ceases to generate step pulses once the button is released The first time the button is pressed after entering M ulti Step Mode the direction will be 0 The direction signal alternates between 1 and 0 with each press of the button In Multi Step mode the Step Regeneration function is disabled regardless of the DIP switch settings The Direction Latch function still operates according to the DIP switch settings WARNING The PC can still read the contact closure inputs and control the relay outputs when the
14. ey are not designed for use with pulse widths under 25 microseconds and may not be suitable for use with position encoders NOTE Due to logic inside the PC some status inputs are inverted This means that a logic high output from the PMD X 120 to the PC s parallel port is read as a O in the status register Please refer to technical documentation on the PC parallel port for more information 2 3 1 Contact Closure LEDs Each contact closure input has an LED that indicates when the input is connected to the return pin Although the polarity of the contact signal sent to the PC may be changed via the DIP switches the LED always indicates a closed contact Also depending on the step direction mapping mode selected the Sense input may also cause the contact input LED to turn on see section 2 3 2 2 3 2 Contact Closure and Sense Inputs Certain Step D irection mapping modes combine the sense input with one of the contact closure inputs See table 3 on page 10 for more information The signals are combined as follows If the sense input is in its on state or the contact closure is connected to the return pin the contact closure LED is turned on and the contact closure signal is asserted to the PC parallel port Note that asserted may be high or low depending on the Contact Closure Polarity DIP switch settings 2 4 Auxiliary 5 Volt DC Output Connector J14 provides a regulated 5VDC output at 50mA max This o
15. h 3 2 Power LED The Power LED D3 is on whenever power is applied to the board 4 0 DIP Switch Settings The PMDX 120 contains 12 DIP switches that determine how the board routes various signals to and from the PC parallel port interface The DIP switches are numbered 1 through 12 both on the DIP switch itself and on the circuit board s silkscreen DIP Switch Function Step D irection mapping and test modes 3 section 4 1 fe Step O utput Polarity section 4 2 5 6 p AT 9 B C Contact Closure Polarity section 4 4 D n Step and Direction conditioning modes section 4 3 Table 2 DIP Switch Summary WARNING You should power off the PMD X 120 before changing these DIP switch settings Changing any of the Step and Direction DIP switches switches 1 through 7 with the PMDX 120 powered on might cause spurious step pulses on the motor connectors J1 through J4 These pulses may violate the timing requirements of your motor driver modules resulting in indeterminate driver behavior This can cause erroneous l motion of your machine PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 9 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 4 4 Step Direction Mapping and Test Modes DIP switches 1 2 and 3 select the mapping mode These switches con
16. he PMD X 120 supplies the 5V power to the opto couplers e Setting the jumper on the two pins farthest from J1 selects ground as the common reference This setting would typically be used with motor drivers that have non isolated TTL logic style inputs NOTE Changing the common reference from 5V to Gnd via jumper JP1 when feeding optically isolated driver inputs will have the effect of inverting the step and direction signals WARNING W hen connecting to non isolated motor driver inputs do not connect the PMDX 120 s 5V reference to ground on the motor driver module Doing so may damage the 74ACT 254 buffer on the PMD X 120 and the inputs to the motor driver PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 5 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 2 1 3 Step Output Polarity Control The PMDX 120 provides a DIP switch to invert the polarity of the step pulses See section 4 2 Step Output Polarity for more information NOTE Changing the common reference from 5V to Gnd via jumper JP1 when feeding optically isolated driver inputs will have the effect of inverting the step and direction signals 2 1 4 Direction Output Polarity The PMDX 120 does not provide a switch to control the polarity of the direction outputs To invert the direction signal eit
17. her configure the PC software or reverse the wiring from the driver to the stepper motors 2 1 5 Parallel Port Step and Direction Mapping The PMDX 120 supports several different mappings from the parallel port data bits to the step and direction outputs These mappings correspond to many of the popular PC based CAM and CNC software packages Refer to section 4 1 Step Direction Mapping and Test M odes for more information 2 1 6 Auxiliary Outputs The 8 bit data port on the PC parallel port supports four sets of step and direction signals Some CAM CNC software packages support only three motor axes and use the remaining two parallel port data bits for general purpose control outputs we call them auxiliary outputs In the Step D irection Mapping and T est Modes that list Aux outputs section 4 1 these auxiliary outputs are passed unaltered from the parallel port to the motor axis 4 connector J4 Aux 1 is connected to J4 dir pin 2 and Aux 2 is connected to J4 step pin 1 They are not affected by the Step O utput Polarity section 4 2 or the Step Regeneration and Direction Latch section 4 3 DIP switch settings The auxiliary outputs are affected by the common voltage reference setting on jumper JP1 Refer to section 3 1 Activity LED for information on the interaction of the auxiliary outputs that the Activity LED 2 2 Sense Auxiliary Input Connector J5 is designed as an auxiliary input specifically for connecting
18. his feature is to lengthen step pulses that are too short for the stepper motor driver W hen enabled this feature will also shorten long Step pulses The regenerated step pulse can be aligned with the rising or falling edge of the incoming step signal The output polarity is controlled by the Step Output Polarity DIP switch except as noted in the table below The PMDX 120 contains a separate pulse regeneration circuit for each of the four motor axes so that the pulses for each axis are independent of the other axes All four regeneration circuits will always operate in the same mode i e all enabled or all disabled and all trigger from the same edge of the incoming step pulses Direction Latching Latches the incoming direction signal on either the leading or trailing edge of the corresponding incoming step signal A common use for this feature is to provide the direction hold time required by some Gecko motor drivers For each conditioning mode listed below except for mode 0 the don t change anything mode there is a figure that shows the incoming step and direction signals along with the potentially modified outgoing step and direction signals NOTE DIP switch 5 is also used in the Single Step test mode see section 5 1 a a 7 6 5 Function Disabled Comments DUDEN a Dir Latch Disabled are directly compatible with your motor drivers Step Regen Enabled Trigger edge determined by Step Output Polarity DIP
19. implied shall extend only to the original purchaser The liability of Practical Micro D esign Inc in respect of any defective product will be limited to the repair or replacement of such product Practical Micro D esign Inc may use new or equivalent to new replacement parts Practical Micro D esign Inc makes no other representations or warranties as to fitness for purpose merchantability or otherwise in respect of the product N o other representations warranties or conditions shall be implied by statute or otherwise In no event shall Practical Micro D esign Inc be responsible or liable for any damages arising a from the use of the product b from the loss of use of the product c from the loss of revenue or profit resulting from the use of the product or d as a result of any event circumstance action or abuse beyond the control of Practical Micro Design Inc whether such damages be direct indirect consequential special or otherwise and whether such damages are incurred by the person to whom this warranty extends or a third party PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 20 of 20 18 January 2007 All Rights Reserved
20. ing and Test Modes tnnt ttti 10 42 Step Output Polarity enn tette rte tei i e Dea ene e Iri Dni des 10 4 3 Step and Direction Conditioning Modes tnnt 11 AA Contact Closure Polarity essen tenente nitent nitent nitent ttti ttti nitent iaa 13 5 0 Test Modes 14 bi Gingle Step MODE iiem tene tene bte pet ANNA 14 52 M lti Step MOdg iiiter eerte tte itid ede st AG 14 e DEMO Modes test ep UU DR ID 15 6 0 Connector dii 0 aaa 16 7 0 Mechanical SpecificationS s s sssssusesunenenennnnnnnnnnnnununununnnnnnnnnnnnnnnnnnnnnnnnunennnnnnnnnnnnnnnnnnnn anamen nannan 18 8 0 Electrical and Environmental Specifications s s sensnennnnnnnunununununununnnnnnnnnnnnnnnnnnnnnnnnnn annann 18 Appendix qui 20 PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 2 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 1 0 Overview This document describes the configuration and operation of the PMDX 120 Parallel Port Accessory Module The PMDX 120 provides a flexible interface between a PC and a multi axis stepper motor system including diagnostic modes to assist in troubleshooting stepper motor driver configuration This document pertains to the following versions of the PMD X 120 Circuit Board Revision PCB 398B marked on the bottom of the board S
21. ing the DIP switches and the momentary contact push button switch SW 2 These test modes will also operate with the PMD X 120 connected to a PC parallel port If a PC is connected to the PMD X 120 while in a test mode the PMD X 120 will ignore the data bits on the parallel port all step and direction signals are generated internally by the PMDX 120 The relay outputs and contact closure inputs remain active in these test modes and are passed to from the PC The Sense input is ignored in all test modes WARNING The PC can still read the contact closure inputs and control the relay outputs when the PMDX 120 is in any test mode This means that the PC could activate unwanted or dangerous features while you are working on the machine Unless you specifically need to interact with the PC you should disconnect it from the PMDX 120 board while working with test modes 5 1 Single Step Mode In Single Step mode the PMD X 120 generates a single step pulse on all four axes simultaneously for each press of the button SW 2 The step signals idle at a logic low and then pulses high and back low on each button press This polarity may be inverted by the Step O utput Polarity DIP switch The direction is determined by DIP switch 5 one of the switches normally used to select the Step and Direction Conditioning Modes W ith DIP switch 5 on the direction is 0 and with the DIP switch off the direction is 1 for all four ax
22. l Comment Strobe iA Relay closed w logic high at LL ss eee Ca 4 7 Data2 out Step Dir input LS bas out eI IIR other features controllable via M cA Co 9 17 Data7 out Step Dir input Contact closure polarity at the PC connector is settable via DIP switch ection 4 4 Er os Relay closed w logic high at Feed out iid the PC pin See contact closure note Ini RA Relay closed w logic high at 17 Select In T Relay closed w logic high at Not used on PC connection 18 25 19 30 10 24 Ground Ground 33 even Table 12 PC Parallel Port Connectors J10 and J9 NOTE 1 The PC Pin number column lists the pin numbers as they would appear on the PC s 25 pin D connector when using a standard printer cable NOTE 2 The Select In and Select O ut signals are named relative to the printer s point of view That is why the Select In is an output from the PC and Select O ut in an input PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 17 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 NOTE 3 J10 is the Centronics 36 pin connector on the PMDX 120 NOTE 4 The pin out of J9 the 26 pin ribbon cable header is arranged to present the standard pin out at the 25 pin D connector when using a ribbon header to 25 pin D connector ribbon cable assembly
23. ording to JP1 see section 2 1 2 Table 5 Motor Axis Connectors J1 J2 J3 and J4 Pini Function S Sense input Sense input Table 6 Sense Auxiliary Input Connector J5 Pin Function PC Parallel Port Pin 25 pin D connector Contact closure input B Contact closure input D Pin 13 Select O ut Contact closure input E 6 Contact closure common return N A Table 7 Contact Closure Connector J6 D Pin PC Parallel Port Pin 25 pin D connector maa Controlled by pin 1 5trobe SET T ome z Controlled by pin 14 Auto Feed EIUS Controlled by pin 16 Init SET T e A Controlled by pin 17 Select In Table 8 Relay Contact Output Connector J7 Function CJ AC Line Power Input AC Line Power Input Table 9 AC Line Power Connector J8 PMDX 120_Manual_16 doc 2002 2007 Practical Micro D esign Inc Page 16 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 AC Low Voltage Power Input AC Low Voltage Power Input Table 10 Alternate AC Low Voltage Power Connector J13 Pin 5V DC Output Ground same ground as the parallel port connector and therefore the PC Table 11 Auxiliary 5V DC Output Connector J14 M Jis T 06 Direction J10 PC Signal relative PMDX 120 cs 1 note 3 ide 4 Eg to PC Signa
24. s such as Auto Feed and Select O ut 25 pin D connector pin numbers 14 and 13 respectively W e recommend using cables that are listed as IEEE 1284 compliant PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 8 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 The following web sites provide information regarding the PC s parallel port including pin outs signal names and useful data for software control of the parallel port e BM PC Parallel Port FAQ and tutorial http www isd mel nist go v projects emc par port html e General information and lots of links http www lvr com parport htm e If the previous links do not work go to http www pmdx com our main web page click on the PMDX 120 link then look for the links to parallel port information pages Note that these web links were accurate as of the printing date of this manual W hile we expect that these two sites will remain available at these addresses it is possible that they will move or disappear 3 0 Miscellaneous 3 1 Activity LED The Activity LED D1 will flash whenever there are step pulses on any of the four axes W hen the Step D irection Mapping and Test Modes DIP switches are set to a mode that lists Aux outputs activity on the Aux 2 signal which is connected to J4 s step output will also cause the Activity LED to flas
25. s product may not be used in life support or other critical safety applications 1 2 Warranty Summary The PMDX 120 is warranted for 90 days from the date of sale If you have an item requiring service please see the support page on the PMDX web site http www pmdx com for return instructions The purchaser must pay shipping to return the unit to PMDX W e will ship the repaired unit back to you via ground transportation at our expense Repairs are normally completed within 10 business days See Appendix A for our official warranty PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 3 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual Document Revision 1 6 1 3 Specifications PCB Revision PC B 398B S N 22634 and above Logic Revision 1 5 The PMDX 120 Parallel Port Accessory Module has the following features PC Parallel Port e Buffers signals to from the PC parallel port e Allows use of all 8 data bits 4 control outputs and 5 status inputs e Centronics cable connector uses standard PC printer cable e Optional support for ribbon cable to 25 pin D connector Contact Closure Inputs e beach opto isolated contact closure inputs e LED indicators for each input e Individual polarity control for each input e Over voltage protection e Tolerates temporary shorts to 110VAC Relay Contact O utputs e Isolated relay contact outputs e LED indicators for each output e MOV s
26. source on J13 This connector is a standard 2 1mm diameter coaxial power connector that is compatible with many wall mounted power packs W hen using J13 as the power supply input make sure that J8 is not connected to anything WARNING When using J13 for the low voltage power input 115VAC will be present on J8 the line voltage power input There is not enough current to power other devices but there is enough to be hazardous W hen using J13 leave J8 un connected and do not touch the J8 terminals while power is applied to the PMDX 120 WARNING Do not feed DC voltages into J13 Doing so will damage the both the PMDX 120 and your power supply 2 7 PC Parallel Port The PMDX 120 provides two methods to connect to the PC s parallel port J10 is a Centronics style connector that allows the use of a standard PC printer cable J9 is a 26 pin header that accepts a 26 pin ribbon cable header to 25 pin D connector adapter cable not supplied with the PMDX 120 This option can be used with printer extension cables male 25 pin D connector to female 25 pin D connector The parallel port data lines pass through a low pass RC filter on the input to the PMD X 120 board This filter serves to remove short glitches approximately 100ns from the data lines which could erroneously be interpreted as a step signal NOTE Some printer cables do not have good signal shielding Some cables also omit some of the status or control signal
27. t MEN MEM Step Output Polarity On Step Output Polarity Off Figure 7 Mode 7 Step Regen Edge Falling Dir Latch Edge Falling 4 4 Contact Closure Polarity DIP switches 8 through 12 determine the polarity of the contact closure signal presented to the PC interface There is one DIP switch for each contact closure signal Table 2 DIP Switch Summary lists the contact closure input controlled by each DIP switch If the switch is on a closed contact results in a logic low at the PC parallel port If the switch is off a closed contact results in a logic high at the PC parallel port Note that these DIP switch settings do not affect the contact closure LED operation see section 2 3 Contact Closure Inputs NOTE Dueto logic inside the PC some status inputs are inverted This means that a logic high output from the PMDX 120 to the PC s parallel port is read as a O in the status register Please refer to technical documentation on the PC parallel port for more information PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 13 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 5 0 Test Modes In addition to the several step and direction mapping modes the PMD X 120 provides modes for stand alone testing These test modes generate step and direction signals without a PC connected us
28. ta bits as control outputs These are listed as Aux in the table and are routed to the PMD X 120 s fourth motor axis J4 See section 2 1 6 Auxiliary Outputs for more information 4 2 Step Output Polarity DIP switch 4 controls the step output polarity This control affects all four axes W ith the DIP switch in the on position the step output pulses have the same polarity as the step input pulses i e a rising edge on the step input creates a rising edge on the step output W ith the DIP switch in the off position the output step pulses are inverted i e a rising edge on the step input creates a falling edge on the step output PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 10 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 4 3 Step and Direction Conditioning Modes The PMDX 120 provides two facilities for conditioning the step and direction signals In the descriptions below incoming step pulses refers to the step pulses present on the PC s 25 pin D parallel port connector i e inputs to the PMDX 120 Likewise outgoing step pulses refers to the step pulses that appear on the PMD X 120 s motor axis connectors J1 through JA i e outputs from the PMD X 120 Step Regeneration Step regeneration creates a uniform width step pulse from the incoming step pulses The most common use of t
29. to the Gecko 300 series Servodrive a k a step servo fault signal This signal is intended for use as a status input to the PC D epending on the DIP switch settings this signal is combined with one of the contact closure inputs Section 4 1 Step Direction M apping and Test M odes lists for each mode the contact closure signal with which the sense input is combined Section 2 3 2 Contact Closure and Sense Inputs explains how the sense input is combined with the designated contact closure input The sense input is a current input Zero current corresponds to off and 1 0 mA corresponds to on current flowing from the input to the input Refer to section 8 0 for a complete list of current and voltage specifications WARNING This input is not protected against over voltage conditions The following sections describe two common connection schemes for the sense input The sense input will not correctly handle normal contact closure inputs 2 2 1 Use With Gecko 300 Series Fault Signal For use with the Gecko 300 series motor drivers i e the 320 or 340 Step Servo drivers connect the sense pins as follows e 1 sense pin to the 5V encoder supply on pin 7 of the Gecko driver e sense pin to the fault signal on pin 5 of the Gecko driver PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 6 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B
30. trol the data bus to step direction mapping It also determines which contact closure input is combined with the Sense auxiliary input The table below shows the mappings supported by the PMDX 120 Although specific software packages are mentioned The PMD X 120 will work with any software package that can be configured to match one of these mappings DIP Switch PC Data Bus Bits Software PC 25 pin D connector pin in parenthesis Sense Bit O Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Banag erode 3 pin eds 8 ping Input d Dir Step Dir Step Dir Step Dir Step Contact A tuocnc 2 2 2 2 3 4 pin 10 Contact E pin 15 1 2 3 4 1 2 3 4 p Step Step Step Aux Dir Dir Dir Aux Contact E 1 2 3 2 1 2 3 1 pin 15 Step Dir Step Dir Aux Aux Step Dir Contact A 1 1 2 2 2 1 3 3 pin 10 Test mode Test mode emo Table 3 Mode Select DIP Switch Settings The PC Data Bus bits are listed from 0 least significant to 7 most significant These data bits appear on the PC s 25 pin D connector on pins 2 through 9 respectively The Sense Input column lists the contact closure input to which the sense input is combined See section 2 3 2 Contact Closure and Sense Inputs for a description of how the sense input and contact closure inputs are combined Some software packages support only three motion axes and use the other two da
31. urge protection on each output Power Supply Input e 115VAC input via screw terminal strip e Or7to9VAC input via 2 1mm coaxial jack 1 4 Grounding and Isolation Motor Step D irection e 4 axes of step and direction e Can supply 5V to motor driver opto couplers e LED shows step pulse activity e Ability to re map data bits from parallel port to step and direction outputs supports EMC Master5 TurboCNC MaxN C TAIG Yeager CN CPro DanCAM and other software mappings e Can regenerate step pulses to uniform width lengthens short pulses from PC e Controls the polarity of the step pulses e Ability to latch the direction signals on rising falling step pulses Special Features e Pluggable screw terminals for all connections to motor drivers relay outputs and switch inputs e Diagnostic modes support testing motor wiring without PC connection e Auxiliary 5 volt supply output The PMDX 120 shares a common ground with the PC The contact closure inputs are isolated from this ground and are designed to protect the PC against voltages of up to 120 VAC The relay outputs are isolated from all other circuits i e they are dry contacts Refer to section 8 0 Electrical and Environmental Specifications for acceptable switching voltages and currents The step and direction signal outputs are not isolated from the PC s ground as this isolation is usually provided by opto couplers in the motor driver 1
32. utput can be used to power low power external devices such as O PTO 22 modules opto couplers or shaft encoders NOTE The ground reference on J14 is the same ground used on the parallel port connector and thus the same ground as the PC This power output is not isolated from the PC PMDX 120 Manual 16 doc 2002 2007 Practical Micro Design Inc Page 7 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 2 5 Relay Outputs The four control signals from the PC s parallel port control four relay contact outputs A logic high on PC s parallel port connector will close the relay and turn on its corresponding LED Each relay output is protected by an MO V style surge absorber NOTE Due to logic inside the PC some control outputs are inverted This means that that writing a 1 to a bit in the control register may result in a logic low at the 25 pin D connector Please refer to technical documentation on the PC parallel port for more information 2 6 AC Power Input 2 6 1 Line Voltage Power Input The PMDX 120 accepts 115VAC nominal power on the non pluggable connector J8 This connector is not pluggable to help prevent accidental connection of 120VAC to any ofthe other inputs or outputs 2 6 2 Alternate Low Voltage Power Input As an alternative to the line voltage input the PMD X 120 also accepts a 7 to 9 VAC power
33. y On Step Output Polarity Off Figure 1 Mode 1 Step Regen Edge Step Output Polarity No Dir Latch Step In Step In Dir In Dir In Step Out Step Out Dir Out ede Dir Out A 0C Step Output Polarity On Step Output Polarity Off Figure 2 Mode 2 No Step Regen Dir Latch Edge Rising Step In Step In Dir In Dir In Step Out Step Out Dir Out WEE NEM Dir Out M T Step Output Polarity On Step Output Polarity Off Figure 3 Mode 3 No Step Regen Dir Latch Edge Falling Step In Step In Dir In Dir In Step Out Step Out Dir Out sce Dir Out MM Step Output Polarity On Step Output Polarity Off Figure 4 Mode 4 Step Regen Edge Rising Dir Latch Edge Rising PMDX 120 Manual 16 doc 2002 2007 Practical Micro D esign Inc Page 12 of 20 18 January 2007 All Rights Reserved PMDX 120 User s Manual PCB Revision PCB 398B S N 22634 and above Document Revision 1 6 Logic Revision 1 5 Step In Step In Dir In Dir In Step Out Step Out Dir Out Le Dir Out PEE SAFE Step Output Polarity On Step Output Polarity Off Figure 5 Mode 5 Step Regen Edge Falling Dir Latch Edge Rising Step In Step In Dir In Dir In Step Out Step Out Dir Out eu Dir Out Dt 2 Mm o 07 Step Output Polarity On Step Output Polarity Off Figure 6 Mode 6 Step Regen Edge Rising Dir Latch Edge Falling Step In Step In Dir In Dir In Step Out Step Out Dir Out er NEM Dir Ou
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