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1. or 5 position DIP switch initially set to address 0000 Various informa tion is transmitted along with the data message to ensure fidelity firmware version number checksum etc and this 4 bit address is included A receiving unit OO or IO must either be set to the default 0000 address or if different the address must match that of the transmitter If the address is non 0000 and does not match the transmitter the received data is treated as corrupt and all bits revert to a safe off state Note that by leaving the address at 0000 the receiver is universal and will ignore any ad dress information received accepting data if it otherwise meets correct format for version signa ture and checksum The data transmitted over the rear panel witness F O transmitters is ALWAYS transmitted with address of 0000 regardless of the switch settings It is important to note that the receiving half of each DSQUIRTO2 unit acts independently A mismatched address will not prevent the transmitting half of the unit from continuing to send data it will only disqualify incoming data from updating the outputs To change the address simply open up the unit by removing the four screws from either end panel and slide out the circuit board Set the address and reassemble the unit Note that the DSQUIRT02 II units have 4 position DIP switches which function exactly as specified above while the DSQUIRT02 O0 and DSQUIRT02 I0 units have 5 position sw2. 16 channel bidirectional link the communications protocol is defined for other combinations even though this will reduce the useful number of digital chan nels IO to OO will effectively form a one way 16 channel link and II to IO will also effectively form a one way 16 channel link The pinouts follow the same protocol for all units The 32 channels are arranged in blocks of eight and mimic the exact pinouts and connections of Allen Bradley PLC 1771 IBN and 1771 OBM devices The detailed pinout depends on whether the copper for a particular block of eight channels is input or output Each block of eight channels is represented on ten pins thus the first block is on pins 1 10 second on 11 20 third on 21 30 and fourth on 31 40 Exact pinouts are shown in the following table Rockfield Research Inc www RockfieldResearch com 702 487 6970 5 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link Pin DSQUIRT II DSQUIRT OO DSQUIRT IO input block A output block A input block A 1 input 00 block A Vcc input 00 2 input 01 output 00 input 01 3 input 02 output 01 input 02 4 input 03 output 02 input 03 5 input 04 output 03 input 04 6 input 05 output 04 input 05 7 input 06 output 05 input 06 8 input 07 output 06 input 07 9 block A com output 07 block A com 10 block A com block A com block A com input b
3. 87 6970 7 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link Conventional 32 channel one way connection of an II and an OO module DSQUIRT02 II DSQUIRT02 00 32 chan Cu to F O 32 chan F O to Cu 1 copper sigs in TT 44 copper sigs out 44 inputs Cu channels 0 31 OO fuse sw off outputs Cu ch 0 31 repeat inputs on II OO fuse sw on outputs ch 0 6 8 14 16 22 24 30 normal null low channels 7 15 23 31 Since there is no fuse data coming from an II module there is no purpose to turning on the fuse switch in a normal II to OO connection Conventional 32 channel one way connection of an II and an OO module with debug moni tor DSQUIRTO02 II DSQUIRT02 O00 DSQUIRT02 O0 32 chan Cu to F O 32 chan F O to Cu 32 chan F O to Cu unit 1 unit 2 witness unit 3 TT cu sigs in TT JY cu sigs out 44 JV cu echo out 44 1 inputs Cu channels 0 31 OO 2 fuse sw off 2 outputs 0 31 repeat 1 inputs 0 31 OO 2 fuse sw on 2 outputs 7 15 23 31 are null low OO 3 fuse sw off 3 outputs 0 31 repeat 1 inputs 0 31 OO 3 fuse sw on 3 outputs 7 15 23 31 show state of 2 fuses By using unit 3 as a debugging monitor we can observe all 32 channels of the communica tion from 1 to 2 or by flipping the fuse switch in 3 we can at the sacrifice of 4 data chan nels observe the fuse state of the unit 2 fuses Rockfield Research Inc www RockfieldResearch com 702 487 6970 8 DSQUIRTO2 32 ch
4. DSQUIRTO2 32 channel 5 kHz Digital F O Com Link DSQUIRT02 32 channel 5 kHz uni or bi directional Digital F O Communications Link User Manual December 2010 Sepcllet te LNT Research inc 11010 Onslow Court Las Vegas NV 89135 702 487 6970 28 Hillcrest Parkway Winchester MA 01890 781 756 3460 www RockfieldResearch com Rockfield Research Inc www RockfieldResearch com 702 487 6970 1 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link IMPORTANT NOTICES WARRANTY AND DISCLAIMER The DSQUIRT02 is scientific instrumentation The success or failure of its use depends as much on the integration by the user as on the design and fabrication by the manufacturer Im proper installation or operation can result in equipment failure and or personal injury The user accepts responsibility to read and understand this manual and to ensure safe operation of the installation where it is used This manual was written to aid the skilled system integrator through the setup and installation of this instrumentation Rockfield Research Inc warranties this product to be free of manufacturing defects and will replace repair or refund any units which fail to operate per specifications within one year of purchase Rockfield Research cannot and does not assume responsibility for the consequences of the use of this equipment or the information in this manual In no event shall Rockfield Research Inc be liable for loss of p
5. annel 5 kHz Digital F O Com Link Conventional 16 16 bidirectional connection of two IO modules DSQUIRT02 IO DSQUIRT02 IO 16 channel bidirectional 16 channel bidirectional unit 1 DSE unit 2 N cu sigs in out N N cu sigs in out N If all fuse switches are off 1 input channels 0 15 repeat on 2 output channels 16 31 and 2 input channels 0 15 repeat on 1 output channels 16 31 If fuse switch for unit 2 is set on then 2 output bits 23 31 show state of 1 fuses Conventional 16 16 bidirectional connection of two IO modules with debug monitor witness TY cu sigs in out N TY cu sigs in out NY JV cu echo out 44 If all fuse switches are off 1 input channels 0 15 repeat on 2 output channels 16 31 and 3 output channels 16 31 2 input channels 0 15 repeat on 1 output channels 16 31 and 3 output channels 0 15 To properly use this configuration to diagnose fuse state set fuse switch off for 1 and 2 and on for 3 The output bits 7 and 15 on unit 3 will then show the state of 2 fuses and bits 23 and 31 on unit 3 will show the state of 1 fuses Rockfield Research Inc www RockfieldResearch com 702 487 6970 9 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link MISCELLANEA The DSQUIRT02 IO is really two completely independent systems a transmitter and a re ceiver The transmitter continually cycles through scanning and transmission of the digital inputs reg
6. ardless of the validity of received data The receiver is not clocked but rather is driven by the received information from the F O receiver port As complete message packets are received they are validated and the information is used to update the appropriate output channels A validation failure will result in all sixteen channels reverting to the safe open output state Note that with this architecture it is permissible to use a pair of DSQUIRT02 IO units as a one way analog link with only one fiber attached Similarly a larger number of DSQUIRT02 IO units could be connected in daisy chain fashion limited only by imagination Use of the DSQUIRT02 II and DSQUIRT02 O0 units is similar with one function disabled in each type but the number of channels transmitted or received doubled A loss of synchronization results in the receiver continuously trying to re establish communi cations with the transmitter This re synchronization is quite robust but it will result in slight delays of transmission for a few cycles during an interrupted re synchronization process The 5 kHz transmission bandwidth will thus be maintained either with or without a receiver fiber plugged in but will be interrupted slightly at the time a receive fiber is plugged in Interruption is also possible if a very long fiber or a dirty fiber connection results in intermittent signal fidelity If transmission bandwidth is critical care should be taken to avoid unplugg
7. he data is transmitted over the witness fiber in IT transmission format represents the actual signals on the 32 channel copper interface regardless of whether said channels are input or output In typical use a single OO unit will be used as a monitor of the witness F O signal with the copper output of the OO connected to a suitable interface or LED display The data transmitted over the rear panel witness F O transmitters is ALWAYS transmitted with address of 0000 regardless of the switch settings Fuses All output blocks are fused with a SMT 4A fuse thus there are four fuses on a OO unit two on an IO unit and none on an II unit The state of each fuse is detected and displayed on a red green LED on the front panel if all LEDs are green all fuses are ok The fuse information is also buried in additional bits transmitted within the F O mes sage packet This can be used to diagnose the state of fuses at remote locations although this function requires the sacrifice of one data bit from each block of eight The OO and IO units have a fifth switch on the DIP switch which is used to select the func tionality of the fuse diagnostic By default this information remains buried and all data chan nels remain intact If the fuse switch is turned on then the highest bit in each output block is replaced with the corresponding fuse information from the transmitting unit Rockfield Research Inc www RockfieldResearch com 702 4
8. ing either fiber in operation and fiber quality should be attended to If chassis grounding is required a 6 32 threaded aluminum standoff such as McMaster Carr part number 93505A443 can be substituted for one of the screws which retains the end panels and used as a grounding lug Similarly the negative ground return leg of the power supply connector as well as all non signal pins on input and output connectors are connected to chassis ground Rockfield Research Inc www RockfieldResearch com 702 487 6970 10
9. itch es For the latter the additional switch changes modes for reporting the output channel fuse state When on the highest bit in each output block is sacrificed and replaced with a status bit showing the state of the output fuse for that block For these units note the labeling on the circuit board for proper identification of the switches Rockfield Research Inc www RockfieldResearch com 702 487 6970 4 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link INTERCONNECTIONS FIBER OPTIC CONNECTIONS The F O interconnections between units should be made with type 62 5 125 fiber with ST Style 2 5mm Bayonet connectors Duplex fiber assemblies meeting this description are availa ble from a number of vendors such as the 3m long Tyco part number 5503994 5 The F O driver is set for 40 mA which should avoid overdriving for zero length fibers while providing sufficient signal for over 2km links DIGITAL INPUT AND OUTPUT CONNECTIONS The digital input and output connections use D Sub 3 row 44 pin high density female con nectors A number of vendors supply these suitable examples would be Norcomp 180 044 103L001 male connector There are three types of DSQUIRT02 boards Il 32 channel copper input to fiber output OO 32 channel fiber input to copper output IO 16 16 channel bidirectional Although the principal function of the II and OO units are to form a one way 32 channel link and a pair of IO units to form a
10. lock B output block B input block B 11 input 08 block B Vcc input 08 12 input 09 output 08 input 09 13 input 10 output 09 input 10 14 input 11 output 10 input 11 15 input 12 output 11 input 12 16 input 13 output 12 input 13 17 input 14 output 13 input 14 18 input 15 output 14 input 15 19 block B com output 15 block B com 20 block B com block B com block B com input block C output block C output block C 21 input 16 block C Vcc block C Vcc 22 input 17 output 16 output 16 23 input 18 output 17 output 17 24 input 19 output 18 output 18 25 input 20 output 19 output 19 26 input 21 output 20 output 20 27 input 22 output 21 output 21 28 input 23 output 22 output 22 29 block C com output 23 output 23 30 block C com block C com block C com input block D output block D output block D 31 input 24 block D Vcc block D Vcc 32 input 25 output 24 output 24 33 input 26 output 25 output 25 34 input 27 output 26 output 26 35 input 28 output 27 output 27 36 input 29 output 28 output 28 37 input 30 output 29 output 29 38 input 31 output 30 output 30 39 block D com output 31 output 31 40 block D com block D com block D com Rockfield Research Inc www RockfieldResearch com 702 487 6970 6 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link Witness Fiber Each unit has a witness fiber transmitter on the back panel useful for redundant data veri fication or debugging and monitoring without disconnecting existing linkages In all cases t
11. put module or another DSQUIRT02 output channel Input 10 30V active hi optimized for 15V operation opto isolator with series diode and series 1 5kQ resistor Each block of eight inputs shares an isolated common return Digital Output Output channels are configured to mimic the Allen Bradley 1771 OBN PLC output module 10 30 VDC high true current sources output In keeping with this the output channels are grouped in blocks of eight with one common pin and one power pin per block thus matching the blockwise pinouts of the AB1771 By design each channel will inter face directly with an Allen Bradley 1771 IBN input module or another DSQUIRT02 input channel Output 10 30V active hi optimized for 15V operation opto isolated output driving IRF7473 FET Each block of eight outputs shares an isolated power and common Each output block of eight channels requires an external power supply be provided of 10 30V optimized for 15V This supply feed is fused internally The fuse status is monitored and shown on the front panel LED The fuse status is also available as a transmitted signal if desired NOTE each input channel has a 150us filter on the input and the response time of the opto isolators is on the same order Although the opto isolated inputs are scanned and transmitted at 5 kHz the filtered response time will be somewhat slower Communications Serial communications over Avago Series HFBR 0400Z F O link Unidirec
12. rofits or incidental indirect special consequential or other similar damages arising out of use of this equipment Any questions or problems should be addressed to Rockfield Research at 11010 Onslow Court Las Vegas NV 89135 702 487 6970 info rockfieldresearch com CONFIDENTIALITY The equipment and information in this manual contains proprietary technology of which Rockfield Research Inc retains ownership By accepting this equipment and documentation the user agrees that it will under no circumstances reproduce divulge reverse engineer or otherwise violate the proprietary information herein OVERVIEW The DSQUIRT02 is a high precision isolated link for reproducing digital signals at a remote location in noisy or high voltage environments Each unit has 32 channels of digital fiber interface Three different options provide for 32 channel copper to fiber 32 channel fiber to copper or 16 16 channel bidirectional Rockfield Research Inc www RockfieldResearch com 702 487 6970 2 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link SPECIFICATIONS Digital Input Input channels are configured to mimic the Allen Bradley 1771 IBN PLC input module 10 30VDC high true current sinking input In keeping with this the input channels are grouped in blocks of eight with two common pins per block thus matching the blockwise pinouts of the AB1771 By design each channel will interface directly with an Allen Bradley 1771 OBN out
13. tional or Bi directional operation Input Power 6VDC to 18VDC lt 2 5 W A commercial UL CE approved 100 240V 50 60 Hz power unit is included with this prod uct If desired any power source in the 6VDC 18VDC range may be used instead Power should be supplied with a standard 2 1mm connector center conductor positive NOTE It is quite permissible to use the same 15V supply for both control power and for powering the interface blocks Rockfield Research Inc www RockfieldResearch com 702 487 6970 3 DSQUIRTO2 32 channel 5 kHz Digital F O Com Link Response to Link Failure Any failure of the link results in all output channels reverting to an OFF condition in which it is not pulled high Failure of the link may include one or more of the following e loss of power of either station cut or unplugged fiber checksum error firmware version mismatch or other data message format error timeout expiration 20 msec without valid received data mismatch of address between stations if addressing option is used The link will re synchronize when the communications error is repaired 1 e fiber is plugged in etc Power cycling is not necessary Indicators A power LED next to the rear panel power switch indicates that power is on A valid reception LED next to the front panel input F O connector indicates that the received information is valid and that the analog outputs are being updated ADDRESSING Each unit has a 4
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