- 1 - User`s Manual: Series 350T Model 350T Frequency Input, DC
Contents
1. 2 Output Connect output per Connection Drawing 4501 294 Load range is a function of the module s output type refer to Output in the preceding SPECIFICATIONS section The output shares a common with the power supply 3 Grounding The General Purpose Housing of this transmitter is plastic and does not require an earth ground connection 4 Input Connect the input per Connection Drawing 4501 294 Be sure to observe proper polarity on unipolar inputs see label for input type If unit is factory calibrated the calibration label indicates range of input Note The input circuit is electrically isolated from the output power circuit allowing the input to operate up to 250V AC or 354V DC off ground on a continuous basis If your input is from a contact closure or from an open collector transistor the excitation circuit must be activated by placing a short jumper wire between the input and L terminal of the transmitter The input circuit of this transmitter accepts most periodic waveforms and will trigger on the positive edge of the input waveform The input stage of this transmitter has a built in low pass filter R1 C1 to remove any high frequency noise that may be present on the input signal If a digital 5V pulse is used to drive the input stage the width of the pulse should be greater than 10 microseconds Note If the input signal amplitude is not adequate to meet the threshold hysteresis requirements the output will2. 350T Series is a DIN rail mounted transmitter family designed to be used as a functional component to provide the user with a modular approach to the varied applications in the field The Series 350T complements the Acromag Series 250T two wire transmitter line providing the same input conditioning for three wire applications That is Series 350T transmitters require a separate power supply connection while the output signal and DC power share a common lead The small package size low power requirements and wide supply range offers maximum flexibility to the system designer As a three wire DC powered device it can also be used in critical applications that require the use of redundant supplies The Series 350T includes reverse polarity protection current limiting and operates from a single 10 36V DC supply In applications requiring only a single transmitter the 350 can use available DC power or it can be wired to an optional Series 35PS power supply module The Series 35PS power supply module receives it s power from either 115V or 230V AC Series 350T User s Manual Frequency Input Applications requiring multiple transmitters at a single location can more efficiently share a single DC supply The modular approach of this design and wide selection of companion Acromag flat pack modules allows additional transmitters input modules isolators and alarms to be easily integrated as required See Drawing 4501 294 for a simplified S
3. Example Model 350T FQ1 Y DIN NCR Input 0 12800 2 Bipolar input Filter 0 4 second step response Output 4 20mA DC 1 The calibration signal amplitude requirements are a function of the Input Conditioning Type selected A Unipolar Threshold 1 5V DC Nominal use a 0 2 0V signal or greater B Bipolar Threshold 0 0V DC Nominal use a 0 2V signal or greater 2 Set the input frequency to 0 Hz Adjust the Zero Z pot until the output reads 4 000mA If the output cannot be reduced to 4 000mA turn the Span pot counter clockwise until the output is reduced to the desired value NOTE If the minimum input is 0 Hz it can be simulated by temporarily disconnecting the signal generator and shorting the input terminals of the transmitter Before going to Step 3 remove the short circuit and connect the signal generator to the input terminals 3 Set the input frequency to 12 800 Hz Adjust the Span S pot until the output reads 20 000mA 4 Repeat Steps 2 and 3 above until the readings converge The instrument is now calibrated Several mid point values should also be checked to verify proper operation of the transmitter 5 After the above calibration procedure is complete install the transmitter PC Board assembly back into its case as described in the assembly procedure below Assembly Procedure for the 350T Plastic Housing Note The Model Serial Number label is attached to the left plastic side 1 Refer to drawi
4. When ordering additional shunt blocks refer to Acromag Part Number 1004 332 Series 350T User s Manual Frequency Input 1 Input Conditioning Selection Determine whether the input signal is a zero crossing or a non zero crossing signal The sinusoidal output from a passive magnetic pickup is a typical 2 crossing signal A typical TTL output is a non zero crossing signal type Refer to Drawing 4501 295 for proper jumper shunt position 2 Input Frequency Range Select the desired frequency range for the input signal and place the shunt block in the required range position A through J Refer to Drawing 4501 295 for proper jumper shunt block position NOTE for best results select the smallest frequency range that will cover the frequency span being monitored Output Ripple Response Time Select the filter for desired results Refer to table 1 on Drawing 4501 295 for proper jumper shunt position Refer to Response Time in the preceding SPECIFICATIONS section which describes the frequency response time combinations that can be achieved while maintaining less than 0 1 output ripple from 10 to 100 of full scale Faster response times may be used when output ripple is not critical Units which have not been factory calibrated have a response time of 0 4 seconds 4 Important Mark the Transmitter s Configuration on the calibration label located on the enclosure Example IN Bipolar Range I 0 to 12 800Hz Fil
5. go to a value that represents 0 Hertz CALIBRATION A TRANSMITTER This section provides information for unit configuration and calibration If the unit was factory calibrated jumpers have been placed in their proper positions and verification of the calibration can be made per the Adjustment Procedure If the calibration of the unit is to be changed first go to the Shunt Block Configuration Procedure before going to the Transmitter Adjustment Procedure 1 Transmitter Shunt Block Configuration Procedure The frequency transmitter is quite universal in that it can be configured for Unipolar or Bipolar input signals a large number of frequency ranges and ripple response filtering Before the adjustment procedure can proceed the jumpers have to be configured to the requirements of the application refer to Drawing 4501 295 for details To gain access to the Configuration Jumpers first remove transmitter from the installation Second remove the circuit boards from the plastic enclosure as described in the Jumper Configuration procedure below Third configure the jumpers shunt blocks as described in the Jumper Configuration procedure below refer to Drawing 4501 295 Note Calibration per the Adjustment Procedure should be performed before the circuit boards are reassembled within the plastic enclosure Disassembly Procedure for the 350T Plastic Housing The plastic housing has no screws it snaps together A flat head
6. screwdriver Acromag 5021 216 or equivalent is needed to pry the housing apart as described in the following steps CAUTION Do not push the screwdriver blade into the housing more than approximately 0 1 inches while prying it apart Handling of the printed circuit boards should only be done at a static free workstation otherwise damage to the electronics could result 1 To begin disassembly refer to Drawing 4501 295 place the screwdriver at point A left side of the transmitter While pressing the blade into the seam use a twisting motion to separate the sides slightly Repeat this operation at point 2 Now that the two pieces have been partially separated use the screwdriver blade to work the left side of the package loose by working around the transmitter and carefully prying the sides further apart Repeat this action until it is easy to remove the left side from the plastic pins holding the pieces together 3 Repeat this operation for the right side at points C and D CAUTION If the two PC boards become separated while taking the package apart re align the boards making sure that both interconnection headers are aligned with their mating sockets at locations E amp F and carefully push the boards back together Jumper Configuration Shunt Blocks Shunt blocks are provided to accommodate in field configuration changes case of misplacement additional shunt blocks may be ordered from the factory
7. 4 0V DC supply R Load 0 to 10750 Output Limiting Voltage units 150 of full scale output nominal Current units 125 of full scale output nominal Output Ripple Less than 0 1 of the maximum output span for inputs from 10 100 of full scale when recommended filter is selected Series 350T User s Manual Frequency Input Power An external DC power supply is required between the output P and terminals Transmitter current is for rated supply inputs full scale output and no load on voltage output units Diode on transmitter provides reverse polarity protection CAUTION Do not exceed 36V DC peak to avoid damage to the transmitter A Process Current Output 10 0V to 36 0V DC 30mA 35mA at current limit Voltage Output 0 12 5V to 36 0V DC 9mA maximum Voltage Output V5 10 0V to 36 0V DC 9 maximum Power Supply Effect DC Volts less than 0 001 of output span per volt DC for rated power supply variations 60 120 Hz ripple less than 0 01 of span per volt peak to peak of power supply ripple Reference Test Conditions Input 0 12800Hz 1000 resistive source Output Y units 4 20mA DC 500Q load Output Vx units 0 10V DC into 10KQ or greater Ambient 77 F 25 C 15V DC supply Accuracy Better than 0 1 of calibrated span The error includes the combined effects of transmitter repeatability hysteresis terminal point linearity and adjustment resolution Doe
8. Acromag 4 User s Manual Series 350 Model 350T Frequency Input DC Powered Transmitters Table of Contents Page IntrOGUCHION aoe 1 20 1 Specifications eerie ener 2 Installation 3 4 General 2 5 List of Drawings Page Electrical Connections Frequency Input 4501 294 6 Configuration Jumper Location Frequency 4501 7 295 Dimensions DIN Rail Mounting 4501 252 8 Electrical Connections Power Supply 4501 254 8 IMPORTANT SAFETY CONSIDERATIONS It is very important for the user to consider the possible adverse effects of power wiring component sensor or software failures in designing any type of control or monitoring system This is especially important where economic property loss or human life is involved It is important that the user employ satisfactory overall system design It is agreed between the Buyer and Acromag that this is the Buyer s responsibility ACROMAG INCORPORATED 30765 South Wixom Road PO Box 437 Wixom MI 48393 7037 USA Tel 248 624 1541 FAX 248 624 9234 Copyright 1995 Acromag Inc Printed in the USA Data and specifications are subject to change without notice 8500 329 B95J003 INTRODUCTION These
9. ERED SUPPLY PROVIDES THREE WAY ISOLATION SPAN ERG INPUT OUTPUT AND POWER OUTPUT DC SUPPLY 12 5 to 36V DC POWER F GROUND CONSULT FACTORY INPUT INPU FOR SUPPLY OPTIONS 115V AC 230V INPUT INPUT SERIES 350 SERIES 350T SERIES 350 SERIES 350 SERIES 550 SERIES 350T TRANSMITTER TRANSMITTER TRANSMITTER TRANSMITTER TRANSMITTER TRANSMITTER w co 12 ac Lo INPUT GROUND TERMINAL 15 NOT CONNECTED INTERNALLY SERIES 350T SERIES 350T SINGLE TRANSMITTER TO POWER MULTI TRANSMITTER POWER SUPPLY CONNECTIONS SUPPLY CONNECTIONS 1 OPTION metres 2 OPTION POWER SUPPLY CONFIGURATIONS ELECTRICAL CONNEGTIONS 1 1 94501 25
10. PPLY SUPPLY BASIC TRANSMITTER ISOLATION SERIES 35 T SIMPLIFIED SCHEMATIC RECOMMENDED CALIBRATION SETUP FREQUENCY FREQUENCY INPUT GENERATOR OPEN COLLECTOR FREQUENCY SOURCE So SERIES 3501 FREQUENCY TRANSMITTER ELECTRICAL CONNECTIONS F D L EXCITATION IS ACTIVATED BY AN no Q EXTERNAL JUMPER BETWEEN INPUT AND L TERMINALS L 0 1 GROUND UNIPOLAR UNIPOLAR UNIPOLAR BIPOLAR Acromag b 4 W EXCITATION CONTACT CLOSURE 1999 FREQUENCY TRANSMITTER INPUT CONNECTIONS eer oa CAREFULLY SEPARATE THE TWO BOARDS FOR ACCESS TO THE RANGE SELECTION JUMPER 42 RANGE SELECTION JUMPER 2 RANGE A 25 TO 5 Hz RANGE 50 TO 190 Hz RANGE 100 200 Hz RANGE 0 200 400 Hz RANGE 400 800 Hz H RANGE 800 1600 Hz RANGE G 1600 TO 3200 Hz RANGE H 5200 6400 Hz RANGE 6400 TO 12800 Hz RANGE J 12800 TO 25600 Hz BOARD FREQUENCY RANGE INTERCONNECTION RESPONSE TIME SELECTION TO 98 OUTPUT BOARD FILTER 1 8 0 SECOND RESPONSE FREQUENCY RANGES THROUGH J 1 TO 5 AND 2 TO 4 FILTER 2 5 0 SECOND RESPONSE FREQUENCY RANGES C THROUGH J PIN 1 TO 3 AND PIN 4 6 ae sect INPUT BOARD 296918 5 5 4 6 INPUT CONDITIONING 79 FREQUENCY RANGE UNIPOLAR RESPONSE TIME INPUT CONDITIONING 1 5 DC THRESHOLD 79 J
11. UMPER CONFIGURATION SEE NOTE 1 BIPOLAR ZERO CROSSING comer W QV THRESHOLD DISASSEMBLY SEE NOTE 1 Example Configuration Filter 3 2 4 Second Response Bipolar Input NOTE 1 REFER THE CALIBRATION SECTION OF THE a SERIES 350 FREQUENCY JUMPER CONFIGURATION 2 ofr 1 1 24501 295 ON a SN 24 NOTE ALL DIMENSIONS ARE INCHES MILLIMETERS 35 T HOUSING DIN RAIL MOUNT Pe BT re RAIL DIN MOUNTING SHOWN THIS SIDE 4 DIN EN 50035 32mm A 1 NOTE PLASTIC ENCLOSURE SNAPS TOGETHER AT SEAMS 0 984 2 45 25 0 11 43 2 1 WIRE INSERTION CLAMPS 1 6 PLACES 1 t RAIL DIN MOUNTING SHOWN THIS SIDE 3 DIN EN 50022 35mm RAIL DIN MOUNTING SHOWN HERE DIN 50035 32mm RAIL DIN MOUNTING SHOWN HERE DIN EN 50022 35mm 6 79 0 1 55 39 4 SCREWDRIVER SLOT FOR 286 REMOVAL FROM RAIL NOTE ADJACENT UNITS CAN BE MOUNTED 73 41 ON 1 0 INCH 25 4mm CENTERS 3 35 5 85 09 3 55 90 17 ENCLOSURE DIMENSIONS FOR DIN RAIL MOUNTING ee eye Avgnes NOTE ALL TRANSMITTERS IN THIS CONFIGURATION SHARE OUTPUT COMMON CONNECTION WITH THE POWER SUPPLY 5 x CURRENT Y Road NOTE THE COMBINATION OF A SERIES 550 TRANSMITTER AN AC POW
12. are accessible on front of the unit The transmitter is DIN rail mounted MODEL SERIES 350T Color coded with a white label INPUT Frequency direct coupled input for span ranges from 25 to 25 600 Hz The input impedance is 50KQ typical Input span and zero ranges are adjustable as specified below except for special ranges which are factory calibrated per customer specifications FQ1 Frequency Span 25Hz to 25 600 2 Zero 0 to 20 of Span The input span is continuously adjustable over the preselected input span range The minimum input frequency for any range can be from 0 to 20 of the full scale frequency 50 Hz 100 Hz 200 Hz 400 Hz 800 Hz 1 600 Hz 3 200 Hz 6 400 Hz 12 800 Hz 25 600 Hz Isolation The input circuit is electrically isolated from the output and power circuits allowing the input to operate at up to 250VAC or 354V DC off ground on a continuous basis will withstand 1500V AC dielectric strength test for one minute without breakdown This complies with test requirements outlined ANSI ISA S82 01 1988 for the voltage rating specified Input Circuit Open Response Down scale drive standard Bipolar Input Configuration User configured by internal jumpers shunt blocks Threshold 0 0V DC Input Amplitude 25mV to 150V RMS Hysteresis 25mV fixed nominal The switching points are 25mV and 25 nominal or 0 0V 0 025V Unipolar Input Configuration Use
13. eries 350T schematic Additional features of this unit include the following A quartz crystal time base design is used for improved temperature performance Three field selectable filter network time constants are provided to optimize the output response time and ripple characteristics Two field selectable input threshold circuits are provided one for bipolar zero crossing signals and one for unipolar non zero crossing signals In the bipolar mode the transmitter has a zero volt threshold and fixed hysteresis If configured in the unipolar mode the module has a 1 5 volt threshold and fixed hysteresis In addition the unipolar mode provides an excitation or pull up circuit This excitation allows interfacing to passive frequency inputs such as with dry rated contact closure and open collector transistor switching Input wiring is inserted in the bottom of the unit while output and power wiring is inserted at the top of the unit Screws to secure the wiring are located on the front panel Connectors are screw clamp type and accept wire size up to14 AWG SPECIFICATIONS Function This family of isolated DC powered transmitters accepts a frequency periodic or pulse waveform input signal provides input circuit isolation and converts the input signal to a process current or voltage output The output and DC power share a common terminal 3 Wire connection Wide range zero and span adjustments utilize 22 turn potentiometers which
14. instructions cover the model types listed in Table 1 below Supplementary sheets are attached for units with special options or features Table 1 A Model Number Format 350T Input Output Mounting Certification Calibration Typical Model Number 350T FQ1 Y DIN NCR C Series Output Notes Table 1 1 FQ1 be ordered with or without the factory calibration C option Any customer specified calibration information will be included on a separate calibration label on the unit 2 Consult the factory for current information on agency e g Canadian Standards Association etc approvals DESCRIPTION These DC powered transmitters accept a periodic or pulse waveform signal such as those originating from tachometers magnetic transducers and turbine flow meters and convert this signal to a process current or voltage output directly proportional to the signal frequency The input circuit is direct coupled and can accept signal amplitudes from 25mV to 150V RMS Input circuit isolation is standard and wide range zero and span adjustments are included Any one of ten input frequency ranges from 25 to 25600 2 spans be selected by changing one jumper shunt block on a digital divider network These transmitters are RFI and EMI protected operate over large temperature ranges and feature excellent temperature coefficients which minimize the effects from the harsh plant environment The
15. lity SWC Input Output terminations are rated per ANSI IEEE C37 90 1978 Unit is tested toa standardized test waveform that is representative of surges high frequency transient electricalinterference observed in actual installations Construction Printed Circuit Boards Military grade FR 4 epoxy glass Terminals Compression type wire size 14 AWG maximum Case Self extinguishing NYLON Type 6 6 polyamide thermoplastic UL94 V 2 color black General Purpose NEMA Type 1 enclosure Printed Circuit Board Coating Fungus resistant acrylic conformal coat Mounting Position Position insensitive MOUNTING DIN General Purpose Housing DIN Rail Mount accepts both amp T rails Rail 32mm 50035 Rail 35mm Type EN50022 Refer to Drawing 4501 540 for outline and clearance dimensions Shipping Weight 1 pound 0 45 Kg packed CERTIFICATION Consult the factory for current information on the availability of agency e g Canadian Standards Association Factory Mutual etc approvals NCR No Certification Required INSTALLATION This transmitter is packaged in a general purpose type of enclosure use an auxiliary enclosure to protect the unit against unfavorable environments and locations Maximum operating ambient temperatures should be within 13 to 185 F 25 to 85 C for satisfactory performance If the unit is factory calibrated it is ready for installation Connect as shown in the Connec
16. ng 4501 295 and line up the left plastic side with the board and terminal assembly Carefully but firmly press the pieces together 2 Before installing the right side place the DIN rail mounting bracket around the pins at the back of the housing 3 Line up the right side of the housing with the assembly and carefully but firmly press the pieces together GENERAL MAINTENANCE The transmitter contains solid state components and requires no maintenance except for periodic cleaning and calibration verification When a failure is suspected a convenient method for identifying a faulty transmitter is to exchange it with a known good unit Itis highly recommended that a non functioning transmitter be returned to Acromag for repair since Acromag makes use of tested and burned in parts and in some cases parts that have been selected for characteristics beyond that specified by the manufacturer Further Acromag has automated test equipment that thoroughly checks the performance of each transmitter REVERSE POLARITY PROTECTION OUTPUT POWER SUPPLY ZERO SPAN CURRENT ADJUST ADJUST LIMITER SIGNAL OUTPUT VOLTAGE V0 V5 AMPLIFIER AMPLIFIER OR CURRENT OUTPUT SIGNAL gt ISOLATION TRANSMITTER ADJUSTMENTS OPTIONAL OUTPUT GROUND OPTIONAL LINEARIZER TC UNITS INTERNAL TRANSMITTER CONFIGURATION JUMPERS SEE DRAWING 4501 295 OUTPUT POWER SU
17. onnections The electrical connections are independent of the mounting configuration The wire size used to connect the unit to the control system is not critical All terminal strips can accommodate wire from 14 26 AWG Strip back wire insulation 1 4 inch on each lead before installing it into the terminal block Input wiring may be either shielded or unshielded twisted pair Output wires should be twisted pair Since common mode voltages can exist on signal wiring adequate wire insulation should be used and proper wiring practices followed It is recommended that output power wiring be separated from signal wiring for safety as well as for low noise pickup 1 Power Connect DC power supply per Connection Drawing 4501 294 These transmitters operate from DC power supplies only Power supply voltage is not critical and normally should be from 10 0V to 36V DC The supply voltage must not exceed 36 Volts even instantaneously and must be adequate to furnish full scale current or voltage to the load Variations in power supply voltage above the minimum required or variations in load resistance have negligible effect on transmitter accuracy Refer to POWER in the preceding SPECFICATIONS section for current requirements The minus power supply lead and the minus output lead share a common terminal This device includes input current limiting and reverse polarity protection Refer to Drawing 4501 254 for other power supply configurations
18. r configured by internal shunt jumper Threshold 1 5V DC Attenuator resistors may be installed on the PC board to further reduce sensitivity by raising the threshold level consult the factory Hysteresis 25mV fixed nominal The switching points 1 525V and 1 475V nominal or 1 5V 0 025V e Amplitude 0 to 2V to 150V RMS e Unipolar Excitation Supply In the unipolar mode the L terminal provides an excitation supply for contact closure or open collector transistor switching circuits Nominal excitation pull up is 5VDC through 15KQ 0 333mA nominal NOTE If input leads are long capacitance developed across the input leads could limit use to lower frequencies Minimum Pulse Width The minimum pulse width required is 10uS OUTPUT Process Current or Voltage output The output shares a common with the power supply Voltage outputs are designed to provide true voltage out with zero volts included and to be stable with capacitive loads Y 4 to 20mA DC see Load Resistance Range Equation 0 to 10V DC into 10 000 ohms or greater V5 0 to 5V DC into 5 000 ohms or greater Load Resistance Range Equation Y output option The maximum load resistance for 20mA compliance is a function of input supply voltage as follows R Load Maximum Minimum VDC supply 2 5V 0 02A At 10 0V DC supply R Load 0 to 375Q At 12 5V DC supply R Load 0 to 500Q At 15 0V DC supply R Load 0 to 6250 At 2
19. s not include sensor error Ambient Temperature Range 13 F to 185 F 25 C to 85 C Ambient Temperature Effect Combined effects of zero span over temperature Less than 0 01 of output span per F 0 018 per C over ambient temperature range for reference test conditions Bandwidth at 25600 Hz typical Response Time The shunt block selection of the filter networks on the circuit board will result in different response times The standard unit is shipped with a 0 4 second response filter To maintain low output ripple for each frequency range use the recommended filter For a step change in the input frequency the nominal response time for a 98 change of the output span is specified below Install shunt blocks per Table below refer to Drawing 4501 295 Table Frequency Range Response Time Selection RESPONSE TIME 98 Frequency Span Range A thru J Filter Jumpers Jumper Block J1 shunt 8 0 seconds Pins 183 Pins 2 amp 4 5 0 seconds C thru J Pins 3 amp 5 Pins 2 amp 4 0 4 seconds D thru J Pins 3 amp 5 Pins 4 amp 6 Noise Rejection Common Mode 115dB 60 Hz 1000 unbalance typical Normal Mode Not applicable RFI Resistance Less than 0 5 of output span with RFI field strengths of up to 10V meter at frequencies of 27MHz 151 2 and 467MHz EMI Resistance Less than 0 25 of output span effect with switching solenoids or commutator motors Surge Withstand Capabi
20. ter 3 0 4 seconds Jumper Configuration Example The following is the configuration for the example given below make adjustments to the configuration as required for your application For our example configure the internal jumpers as follows A Unipolar Bipolar Bipolar Shunt Block J1 pins 9 amp 10 Frequency Range Range 0 to 12800Hz Shunt Block J2 position 1 C Ripple Response 0 4 Seconds Shunt Block J1 pins 3 to 5 amp 4 to 6 Transmitter Adjustment Procedure Connect transmitter as shown in the Connection Drawing 4501 294 The input signal source must be adjustable over the entire frequency range 0 25600 Hz of the transmitter In addition the frequency source must be adjustable and stable to any specific frequency with an accuracy of 0 1 or better Signal amplitude should be set at a level representative of the actual input signal It is recommended that a frequency counter be used to measure input frequency as most dial markings are not accurate enough The transmitter power supply voltage must be between 10 and 36V at the terminals of the transmitter The output voltage must be measured to 0 1 accuracy or better for proper results The Zero and Span adjustments are accessible on the front panel of the transmitter see Drawing 4501 294 for their location The screwdriver blade used to adjust the potentiometers should not be more than 0 1 inch 2 54mm wide Transmitter Calibration
21. tion Drawing 4501 294 If the unit is not factory calibrated refer to the CALIBRATION section Mounting Mount transmitter assembly refer to Drawing 4501 252 for mounting and clearance dimensions DIN Rail Mounting Use suitable fastening hardware to secure the DIN rail to the designated mounting surface The transmitter is supplied with the DIN Rail mounting option DIN and can be mounted to either the or style rails Installation of the alarm to the rail depends on the type of DIN rail used Units can be mounted side by side on 1 6 inch centers if required Rail 835mm EN50022 To attach a transmitter to this style of DIN rail angle the top of the unit towards the rail and locate the top groove of the adapter over the upper lip of the rail Firmly push the unit towards the rail until it snaps solidly into place To remove a transmitter insert a screwdriver into the lower arm of the connector and pull downwards while applying outward pressure to the bottom of the unit Series 350T User s Manual Frequency Input G Rail 32mm Type EN50035 To attach a transmitter to this style of DIN rail angle the unit so that the upper groove of the adapter hooks under the top lip of the rail Firmly push the unit towards the rail until it snaps solidly into place To remove an transmitter pull the lower part of the unit outwards until it releases from the rail and lift the unit from rail Electrical C
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