- 1 - User`s Manual: Series 340I Model 340I DC-Powered
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1. of your application Load Resistance Range Equation The maximum load resistance is a function of available power supply voltage as follows refer to Drawing 4501 265 R Load Maximum Minimum VDC supply 5 0V 0 02A That is with a 10 0V DC supply R Load 0 to 250 ohms with a 15 0V DC supply R Load 0 to 500 ohms with a 24 0V DC supply R Load 0 to 950 ohms Series 340I User s Manual Process Current Input Isolator Output Limiting Output current is limited to 27mA nominal Output Ripple Less than 0 1 of the maximum output span Power 10 0V to 36 0V DC 27mA nominal The external DC power supply is connected between the output P and terminals The output shares a common connection with the power supply The current specified is for rated supply inputs and full scale output Supply current is limited to 34mA maximum Diode installed in isolator provides reverse polarity protection IMPORTANT Do not exceed 36V DC peak to avoid damage to the isolator Power Supply Effect DC Volts less than 0 001 of output span per volt DC change in supply 60 120Hz Ripple less than 0 01 of span per volt peak to peak of power supply ripple Reference Test Conditions Input Output current 4 to 20mA output load 250 ohms 779F 2590 15V DC supply Accuracy Better than 0 1 of output span This error includes the combined effects of isolator repeatability hysteresis terminal point linearity and a2. 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 Series 340I User s Manual Process Current Input Isolator CALIBRATION units are calibrated and checked for proper performance at the factory before they shipped The calibration example below is provided for reference Isolator Adjustment Procedure Connect the isolator as shown in the recommended calibration connections of the connection diagram Drawing 4501 261 The input current source must be adjustable over the entire input range of the unit and settable to an accuracy of 0 05 or better for proper results The Zero and Span adjustments are accessible on the front panel of the isolator see Drawing 4501 261 for location The Zero and Span trim provided are not wide range adjustable and are suitable for fine tuning only The screwdriver blade used to adjust the potentiometers should not be more than 0 1 inch 2 54mm wide Isolator Calibration Example MODEL 340I C1 Y DIN NCR Input 4 to 20mA DC Output 4 to 20mA DC 1 Set the input source to 4 000mA Adjust the Zero Z pot until the output reads 4 000mA DC NOTE If you have trouble reaching zero you may have to first set the span near 16 000mA 2 Setthe input source to 20 000mA Adjust the Span S pot until the output reads 20 000mA DC 3 Repeat steps 1 and 2 until the read
3. if required T Rail 35mm Type 50022 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 340I User s Manual Process Current Input Isolator Rail 32mm 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 a transmitter pull the lower part of the unit outwards until it releases from the rail lift unit from rail Electrical Connections 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 the 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 and power wiring be separated from the signal wiring for safety as
4. well as for low noise pickup 1 Power Connect DC power supply per connection diagram refer to Drawing 4501 261 This isolator operates from DC power supplies only Power supply voltage is not critical and should normally be from 10 to 36V DC The supply voltage must not exceed 36V or damage to the unit may occur The power supply voltage must be adequate to furnish full scale current to the load s Rated variations in power supply voltage or load resistance have negligible effect on isolator 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 Power connections are reverse polarity protected Refer to Drawing 4501 263 for other power supply configurations Ripple and Noise Power supply ripple at 60Hz 120Hz is reduced at the load by the isolator The ripple at the load will be less than 0 01 of span per volt peak to peak of power supply ripple 2 Output Connect output per connection diagram refer to Drawing 4501 261 Load range is a function of the module s power supply voltage refer to Output in the preceding SPECIFICATIONS section see Drawing 4501 265 The output shares common with the power supply 3 Grounding The transmitter housing is plastic and does not require an earth ground connection 4 Input Input is 4 to 20mA DC Connect input per connection diagram observe proper polarity
5. 56T SERIE SERIES 356T SERIES 3401 SERIES 3401 5 350T ISOLATOR ISOLATOR TRANSMITTER TRANSMITTER TRANSMITTER TRANSMITTER LacQo 12 ac eRoUNO GROUND NOTE INPUT GROUND G TERMINAL v 15 CONNECTED INTERNALLY A A SERIES 5401 35 5 SERIES 35401 550 SINGLE ISOLATOR TO POWER MULTIPLE ISOLATOR AND TRANSMHTER POWER SUPPLY CONNECTIONS SUPPLY CONNECTIONS POWER SUPPLY CONFIGURATIONS wren o ELECTRICAL CONNECTIONS se grasor 2es a SERIES 3401 MAXIMUM LOAD RESISTANCE VERSUS SUPPLY VOLTAGE 5 lt NOTE MAXIMUM LOAD RESISTANCE IS 4 m 1550 OHMS AT 36V DC SUPPLY moz u umq Oror 20 25 30 35 SUPPLY VOLTAGE TEM LI Lu ActoMag WIXOM MICH Ec E In ME SERIES 340 MAX LOAD VERSUS SUPPLY c 7 3401 4501 265
6. Acromag d User s Manual Series 340I Model 3401 DC Powered Input Isolator Table of Contents Page DtroOdUctIlOB vts cut Mt ecu USE ML 2 2 3 I stallatiot z 5 7 General Maintenance 135 3599 eeiam ieiunia 7 List of Drawings Electrical Connections No 4501 261 8 Dimensions DIN Rail Mounting No 4501 262 9 Electrical Connections Power Supply Configurations No 4501 263 10 Load Resistance Versus Supply Voltage No 4501 265 11 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 Inc Tel 248 624 1541 30765 South Wixom Road FAX 248 624 9234 P O Box 437 Wixom Michigan 48393 7037 USA Copyright 1993 Acromag
7. Inc Printed in USA Data and specifications subject to change without notice 8500 334 B93K008 Series 340I User s Manual Process Current Input Isolator INSTRUCTIONS SERIES 3401 Process Current Input Isolator DC Powered INTRODUCTION These 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 340I Input Output Mounting Certification B Typical Model Number 340I C1 Y DIN NCR Output 340I DIN Agency Approval 2 Notes Table 1 1 All units are factory calibrated for 4 to 20mA DC input and 4 to 20mA DC output no C suffix needed 2 Consult the factory for current information on agency e g Canadian Standards Association etc approvals DESCRIPTION This DC powered input isolator accepts a 4 to 20mA DC input signal and provides an isolated 4 to 20mA DC output signal The isolator operates from a wide supply range has a low input burden is RFI and EMI protected and operates over a large temperature range with excellent temperature coefficients which minimize effects from the harsh plant environment The Series 340I is a DIN rail mounted process current isolator designed to be used as another functional component to provide the user with a modular approach to the varied applications in the field Unlike the Series 270I which is a two wire loop powered isolator th
8. PUT ISOLATOR ELECTRICAL CONNECTIONS EE IL lC mms NOTE Tita wich 1 MAXIMUM LOAD RESISTANCE IS FUNCTION ISOLATOR POWER 5 TE SERIES 3401 ISOLATOR CONNECTIONS FOLLOWS R LOAD MAXIMUM MINIMUM SUPPLY 5 0 8 924 oe xe rem 4501 261 NOTE PLASTIC ENCLOSURE SNAPS TOGETHER AT SEAMS WIRE INSERTION CLAMPS 6 PLACES RAIL DIN MOUNTING T SHOWN THIS SIDF RAIL DIN MOUNTING SHOWN THIS SIDE DIN 50035 32mm DIN EN 50022 35mm RAIL DIN MOUNTING SHOWN HERE DIN EN 50035 52mm RAIL DIN MOUNTING SHOWN HERE DIN EN 50022 35mm SCREWDRIVER SLOT FOR 2 89 REMOVAL FROM RAIL NOTE ADJACENT UNITS CAN BE MOUNTED 3 ON 1 0 INCH 25 4mm CENTERS ENCLOSURE DIMENSIONS WITH DIN RAIL MOUNTING ad b LA Ld Acro ag NOTE ALL DIMENSIONS ARE IN INCHES MILLIMETERS hue e NOTE ALL MODULES IN THIS CONFIGURATION SHARE COMMON CONNECTION WITH THE POWER SUPPLY MAXIMUM LOAD RESISTANCE 1 FUNCTION SUPPLY VOLTAGE AS FOLLOWS MAX MIN SUPPLY 5 0 0 02 me Proan AX NOTE THE COMBINATION OF A SERIES 3461 ISOLATOR AND AC POWERED SUPPLY PROVIDES THREE WAY ISOLATION INPUT OUTPUT AND POWER DC SUPPLY POWER GROUND CONSULT FACTORY FOR SUPPLY OPTIONS 1 OPTION ss SERIES 3501 SERIES 3
9. Transformer Isolation Low Input Burden less than 1 5V Wide Ambient Temperature Range Highly Accurate and Stable Inch Wide DIN Mounted Package No Load Trimming Required DC Powered Wide Supply Range Current Limiting Included Allows Use of Redundant Supplies 0 500 ohm Load Range 15V supply SPECIFICATIONS Function This DC powered isolator accepts a 4 to 20mA DC input has input circuit isolation and provides a 4 to 20mA DC output The output and DC power share a common terminal 3 Wire connection The Zero and Span trim adjustments utilize 15 turn potentiometers accessible from the front of the unit This isolator is DIN rail mounted MODEL SERIES 3401 Color coded with a white label INPUT C1 4 TO 20mA DC with an input drop less than 1 5V at full scale IMPORTANT Input current must not exceed 100mA or damage to the unit could occur Isolation The input circuit is electrically isolated from the output and power circuits allowing the input to operate at up to 250V AC 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 in ANSI ISA S82 01 1988 for the voltage rating specified OUTPUT 4 to 20mA DC The output shares a common with the power supply NOTE A voltage output option is not available for the Series 3401 Instead specify Model 350T C1 Vx NCR C if this is a requirement
10. djustment resolution Does not include sensor error Ambient Temperature Range 139F to 1859F 259C to 859C Ambient Temperature Effect Less than 0 003 of output span change per 9F 0 005 per over the ambient temperature range for reference test conditions This specification includes the combined effects of zero and span over temperature Bandwidth 3dB at 50Hz typical with 500 ohm load Response Time For a step input the output reaches 98 of output span in 25ms typical with 500 ohm load Noise Rejection Normal Mode 6dB at 60 Hz typical with 500 ohm load Common Mode 95dB at 60Hz typical with 500 ohm load RFI Resistance Less than 0 5 of output span with RFI field strengths of up to 10V meter at frequencies of 27 151 and 467 MHz EMI Resistance Less than 0 25 of output span effect with switching solenoids or commutator motors Surge Withstand Capability SWC Input Output terminations rated per ANSI IEEE C37 90 1978 Unit is tested to a standardized test waveform that is representative of surges high frequency transient electrical interference observed in actual installations Series 340I User s Manual Process Current Input Isolator Construction Printed Circuit Boards Military grade FR 4 epoxy glass circuit board Terminals Compression type wire size 14 AWG maximum Case Self extinguishing NYLON Type 6 6 polyamide thermoplastic UL94V 2 color black General Purp
11. e Series 3401 is a three wire isolator That is Series 3401 Isolators 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 user As a three wired DC powered device it can also be used in critical applications that require the use of redundant supplies The Series 340I includes reverse polarity protection current limiting and operates from a single 10V to 36V DC supply In applications requiring only a single isolator the 3401 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 AC or 230V AC Applications requiring multiple isolators at a single location can more efficiently share a single DC supply The modular approach of this design and companion Acromag flat pack modules allows additional transmitters input modules isolators and alarms to be easily integrated as required See Drawing 4501 261 for a simplified Series 340I schematic Series 340I User s Manual Process Current Input Isolator 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 to 14 AWG Key 340I Features True Galvanic
12. ings converge 4 Check the midpoint by setting the input source to 12 000mA The output should read 12 000mA 0 016 DC instrument is now calibrated GENERAL MAINTENANCE The isolator 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 isolator is to exchange it with a known good unit It is highly recommended that a non functioning isolator 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 isolator 4 20 ERI CURRENT ISOLATOR ISOLATOR MIRROR DC POWER DC POWER SIGNAL 12 36 DC TEC 10 56 ISOLATION CURRENT BALANCE OUTPUT ZERO SPAN CURRENT R R POWER ADUSI CONTROL OUTPUT LOAD LOAD Ronse l SEE NOTE 1 SEE NOTE 1 SUPPLY AMPUFEER CURRENT REVERSE POLARITY PROTECTION OUTPUT FILTERING ADJUSTABLE 250 OHMS PRECISION 0 1 CURRENT SOURCE TRANSMITTER DC POWER 256 OHMS 91 ISOLATOR ZERO ANO SPAN ADJUSTMENT TYPICAL TWO WIRE TYPICAL FOUR WIRE TRANSMITTER CONNECTIONS TRANSMITTER CONNECTIONS RECOMMENDED CALIBRATION CONNECTIONS SERIES 5401 IN
13. ose 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 G amp T rails G Rail 32mm Type EN50035 T Rail 35mm Type EN50022 Refer to Drawing 4501 262 for outline and clearance dimensions Shipping Weight 1 pound 0 45Kg 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 The isolator is packaged in a general purpose type of enclosure Use an auxiliary enclosure to protect against unfavorable environments and locations Maximum operating ambient temperatures should be within 13 to 1859F 25 to 859C for satisfactory performance If the has been calibrated it 1s ready for installation Connect as shown in the connection diagram of Drawing 4501 261 To verify calibration refer to the CALIBRATION section Mounting Mount isolator assembly refer to Drawing 4501 262 for DIN rail mounting and clearance dimensions DIN Rail Mounting Using suitable fastening hardware secure the DIN rail to the designated mounting surface A transmitter can be mounted to either the T or G Rail Installation of the transmitter to the rail depends on the type of DIN rail used Units can be mounted side by side on 1 0 inch centers
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