VCON USER MANUAL
Contents
1. L201 L106 L105 LI04 J110 L112 LIII L202 L109 s5 L108 L107 s6 INPUT T C RANGE 1 L104 amp L107 FITTED T C RANGE 2 L105 amp L108 FITTED T C RANGE 3 L106 amp L109 FITTED mV RANGE L201 amp L202 FITTED BURNOUT UPSCALE J110 E DOWNSCALE J110 A OUTPUT L112 L111 S5 S6 0 10V E 4 20mA EN i EM LINK POSITION Page 11 Page 12 VCON USER MANUAL VCON RTD Link Setting Diagram a ES S10D S108 LINEARITY S10A S9D L112 S9C Sop ZERO S9A Lill S8D S8C s5 S8B GAIN S8A S6 INPUT RTD RANGE 1 S8A S9A amp S10A LINKS FITTED RTDRANGE2 g8B S9B amp SIOB LINKS FITTED RTD RANGE3 g8C S9C amp S10C LINKS FITTED RTDRANGE4 S8D S9D amp S10D LINKS FITTED OUTPUT L111 amp L112 S5 S6 0 10V E 4 20mA l HH LINK POSITION IIG 9501 03 5 1 5 2 5 3 VCON USER MANUAL RECALIBRATION All units are factory calibrated although the user may wish to recalibrate with greater frequency a two yearly recalibration interval is adequate for most applications In the case of reconfigurable units recalibration must be carried out after any change of configuration VCON HL With appropriate input values use front panel zero and span pots to obtain de2. C 100ppm C 10ppm Q 0 lt Ry lt 7500 30ms typical 0 2 full scale 2 C over operating temperature range 0 1 full scale 50ppm full scale C 100ppm C 10ppm Q 0 lt Ry lt 7500 300ms typical 0 3 C 0 05 full scale 0 1 full scale SOppm full scale C 100ppm C 10ppm Q 0 lt R lt 7500 40ms typical IIG 9501 03 VCON USER MANUAL Power Supply Isolation and Operating Ambient all types Operating Voltage 24V DC 10 Current consumption 45mA typical Input to output to power supply isolation 3 1kV DC port Operating temperature range 0 55 C Storage temperature range 40 100 C Operating and storage humidity range O 90 RH Upscale output 22mA RFI Immunity All members of the VCON family have been tested with 4 20mA outputs for RFI immunity to IEC 801 3 as follows Pass condition Output current varies by less than 1 full scale any field orientation VCON HL Field Strength Immunity Level Vm 1 Frequency Range MHz 10 27 500 VCON TC Field Strength Immunity Level Vm 1 Frequency Range MHz 10 27 429 441 500 3 27 500 VCON RTD Field Strength Immunity Level Vm 1 Frequency Range MHz 10 27 500 50Hz Rejection load resistance Ry 5000 VCON TC Common mode rejection ratio CMRR 130dB Differential or normal mode rejection ratio 50dB NMRR N B 80dB NMRR is available as a special option Response tim
3. R B E U L and S alternatively a mV input may be specified All specified ranges are zero referred i e 0 F 0 C or O mV although negative inputs will not damage the unit Automatic cold junction compensation will be fitted to thermocouple units for which either upscale or downscale drive on break detection are link selectable The output is not linearised For standard thermocouples the operating range will be specified in C or F as required In general the limits on signals that can be handled with the accuracy specified in Section 7 are INPUT TYPE FULL SCALE INPUT NOTES MIN MAX mV 4mV 100mV J L 80 C 1200 C Ko oc 1372 C TU 400 C E j swe 100 C N asorc more Ro E ee O Esse 910 C 1820 C Cold junction compensation will not be fitted VCON RTD Accepts inputs from resistance thermometers such as the PT100 type in 2 or 3 wire configuration Additionally 2 wire potentiometers less than 1 Kohm can be accommodated In general the measured resistance can be anywhere between zero and 1 K ohm and standard curves such as PT100 can be linearised The minimum span must be 10 ohm for the accuracy specified in Section 7 which corresponds to roughly 30 C for a PT 100 sensor For standard RTD sensor types the operating range will be specified in C and the output will be linearised otherwise the range will be specified in ohms without linearisation IIG 9501 03 VCON USER MANUAL 1 2 Output Types and Range
4. different formats are as shown below Each is available in either MVCON or VCON form the MVCON being mains powered whilst the VCON is powered by a low voltage source This manual applies specifically to the VCON Input signal output signal and power supply information are required to define any unit exactly This information together with a unique serial number is printed on the side label of each unit records of the exact configuration of every product shipped are maintained at the factory 1 1 Input Types and Ranges VCON HL Accepts either voltage or current i e high level inputs with optional transmitter supply or 2 wire potentiometers current excitation 3 wire potentiometers current or voltage excitation In general the limits on signals that can be handled with the accuracy specified in Section 7 are FULL SCALE INPUT MIN SPAN NOTES LO A 50 full scale DC voltage 100mV 300V 50 full scale Use VCON TC for Vin lt 100mV 100mA RMS 104 RMS 50 full scale 45Hz lt fin lt 450Hz AC voltage 200mV RMS 250V RMS 50 full scale 45Hz lt fin lt 450Hz 2 wire 1 K ohm 1 M ohm 50 of travel Use VCON RTD forR lt 1 Potentiometer K ohm 3 wire 10 ohm 10 M ohm 50 of travel Potentiometer All the standard process ranges such as 0 10mA 4 20mA 0 20mA 1 5V and 0 10V are of course covered IIG 9501 03 Page 3 Page 4 VCON USER MANUAL VCON TC Accepts inputs directly from the following Thermocouple types J K N T
5. 60 are link selectable Up to 4 linearised input temperature ranges can be specified Output Configuration The output of a reconfigurable unit may be configured to give any of the following DC ranges 0 20mA 4 20mA 0 1V 0 10V IIG 9501 03 Page 9 VCON HL Link Setting Diagram Page 10 VCON USER MANUAL INPUT OUTPUT s8 s3 s4 S9 SS S7 S6 S3 S4 S5 S6 S7 S8 S9 0 4 20m40 4 20mA 4 20mA 0 10v 0 10v 0 10v 0 10v 4 20mA O lv 4 20mA 0 lv 0 10v 0 lv 0 1v e A o NN no E m E INPUT OUTPUT 3 S4 5 S6 S7 S8 S9 0 20mA 4 20mA ma 42004 o EO 4 20mA 0 20mA ma ooma G m a TIO 0 10y 0 lv E E E 420mA 0 1 E ie mma E UE 0 20mA 0 10v EE w EE 0 10v 0 20mA E mal E 0 20mA 0 1 m o a ESE 0 iv 020mA E E E EM LINK POSITION IIG 9501 03 IIG 9501 03 VCON USER MANUAL VCON TC Link Setting Diagram
6. CON USER MANUAL RECONFIGURING THE INSTRUMENT applies to reconfigurable units only In many cases the instrument is factory configured in which case this section can be ignored However if the unit is reconfigurable this will be stated on the serial number label In order to reconfigure the instrument it is necessary to remove the circuit board from the plastic enclosure This is achieved by gently levering apart both the grey sides at the front of the unit such that the black connector pips are released and sliding the black connector blocks forward Inside the unit are various handbag links which are set to obtain the performance required The positions of these links and the performance achieved is described in the diagrams overleaf Input Configuration VCON HL Current or voltage input can be selected to achieve any of the following DC inputs 0 20mA 4 20mA 0 1V 0 10V VCON TC Up to 3 thermocouple types with cold junction compensation and mV input no cold junction compensation can be specified for link selection Up to 4 input temperature ranges can be specified for link selection NB This nominally means that the unit can be used for four different thermocouple applications at least two of which must use the same thermocouple type However by parallel combination of the range links many more ranges may be possible consult factory for information VCON RTD PT100 platinum resistance thermometers to BS1904 or DIN437
7. VCON USER MANUAL IIR ISOCON FAMILY OF ISOLATING SIGNAL CONDITIONERS VCON Whilst every effort has been taken to ensure the accuracy of this document we accept no responsibility for damage injury loss or expense resulting from errors or omissions and reserve the right of amendment without notice Industrial Interface Research Limited 1995 This document is issued by Industrial Interface Research Ltd and may not be reproduced in any way without the prior written permission of the company HG 9501 03 Page 1 Page 2 1 0 2 0 3 0 4 0 5 0 6 0 7 0 VCON USER MANUAL CONTENTS INTRODUCTION UNPACKING CONNECTIONS RECONFIGURATION applies to re configurable option units only RECALIBRATION INSTALLATION SPECIFICATIONS PAGE 13 14 15 IIG 9501 03 VCON USER MANUAL 1 0 INTRODUCTION The VCON range is a family of signal conditioners capable of accepting a wide variety of electrical input types into an isolated input stage and providing a separate isolated re transmitted output Each unit is a full 3 port isolating device the input output and power supply input being isolated from each other In addition an optional isolated transmitter power supply is available VCON HL only This can be used to excite any standard 2 wire transmitter having a maximum supply current of 25mA The instrument is available in three different formats each accepting an input from a different type of sensor The
8. a short circuit between input terminals 4 and 5 before carrying out the calibration from the front panel pots Only applies to reconfigurable units HG 9501 03 Page 13 6 0 6 1 5 2 5 3 11 iii iv Page 14 VCON USER MANUAL INSTALLATION Fig 3 Installation Data amp Terminal Positions For VCON 22 5mm gt Installation Data Mounting DIN Rail T35 Orientation Any Vertical Preferred Connections Screw Clamp With Pressure Plate e Conductor Size 0 5mm 4 0 mm Insulation Stripping 10mm Screw Terminal Torque 0 4Nm Max Weight 100g approx Depth Of Unit 100mm Installation onto Rails The instrument is designed to mount directly onto the Top hat TS35 standard assembly rail to DIN 46277 part 3 EN 50022 BS5584 Mounting Arrangements Ideally the unit should be mounted in a vertical position i e on a horizontal rail This is the optimum orientation to minimise temperature rise within the unit However successful operation is possible in any orientation Ensure the maximum ambient temperature is less than 55 C Good airflow around the unit will maximise reliability Wiring Precautions The unit can accept a variety of sensor inputs some of which produce very small signals Therefore it is advisable to adhere to the following rules of good installation practice Do not install close to switchgear electromagnetic starters contactors power units or motors Do not have power or co
9. e is increased to 600ms typical IIG 9501 03 Page 17
10. erminals 1 negative and 2 positive The supply voltage is indicated on the serial number label APPLICATION OF VOLTAGES HIGHER THAN THAT STATED FOR THE SUPPLY MAY CAUSE DAMAGE TO THE INSTRUMENT Ensure that no bare wire protrudes from the rear of the power connector risking a short circuit We advise the use of bootlace ferrules on all bare wires Sensor Connections All sensor connections are made to terminals numbered 4 5 and 6 on the instrument The inputs are connected as described below Voltage Inputs This applies to the high level input device only VCON HL The signal should be connected between pins 5 positive and 4 negative The input voltage range is given on the serial number label Current Inputs This applies to the high level input device only VCON HL The signal should be connected between pins 5 positive and 4 negative The input current range is given on the serial number label When the optional transmitter supply is used the ve of the transmitter is connected to pin 3 and the return to pin 5 No other external links are required HG 9501 03 Page 7 3 2 3 3 2 4 3 2 5 3 3 Page 8 VCON USER MANUAL Potentiometer Inputs This applies to the high level input device only VCON HL Connections should be made between pins 3 4 amp 5 as per the following diagrams 3O Rmax 10 Rmax 50 gt se gt o 40 40 Rmin Rmin 3 WIRE CONNECTION 2 WIRE CONNECTION voltage current excitation curren
11. ntrol wiring in the same loom as sensor wires Use screened cable for sensor wiring with the screen earthed at one end only Take care not to allow cut pieces of wire to fall onto the unit as they might enter via the IIG 9501 03 VCON USER MANUAL ventilation holes and cause electrical short circuits if in doubt remove the units from the rail until wiring is complete v Use bootlace ferrules on all bare wires IMPORTANT The connection terminals are designed for a maximum torque of 0 4Nm Exceeding this figure is unnecessary and will result in unwarrantable damage to the unit IIG 9501 03 Page 15 VCON USER MANUAL SPECIFICATIONS All specifications are at 20 C operating ambient with 2500 output load current output unless otherwise stated Accuracy and Response VCON HL VCON TC Calibration accuracy at zero and full scale Linearity Zero drift Gain drift Gain dependence on load resistance Ry Response Time 90 of step change Calibration accuracy at zero and full scale Cold junction compensation accuracy Linearity with respect to thermocouple voltage Zero drift Gain drift Gain dependence on load resistance Ry Response time 90 of step change VCON RTD Page 16 Calibration accuracy at zero and full scale Linearity Zero drift Gain drift Gain dependence on load resistance Rr Response time 90 of step change 0 05 full scale 0 1 full scale SOppm full scale
12. s All members of the VCON family share the same output stage which can provide three types of output OUTPUT FULL SCALE RANGE Over range limit approximate 1 Current Source into 15 K ohm MAX 11 Unbuffered voltage source _ into 10 K ohm into 750 K ohm MIN MIN 111 Buffered voltage 100mV source into 100 ohm into 2K ohm MIN MIN jiv Currentsink PP This includes all standard output ranges such as 0 10mA 4 20mA 0 20mA 1 5V and 0 10V _ Unbuffered voltage source outputs may be used with load resistances lower than minimum specified values but a span trim will be necessary to give the specified accuracy Current sink option is available by special request contact factory for details 1 3 Power Supply Standard power supply requirement is for 24Vdc 10 for specified performance 5V DC 12V DC and 24V AC supplies can be catered for by special request contact factory for details Maximum current consumption at 24V DC depends on application as follows I supply max Current source output no transmitter supply 50mA Unbuffered voltage source output no transmitter supply 50mA Buffered voltage source output no transmitter supply 70mA Additional requirement for transmitter supply or 2 3 wire 40mA potentiometer input VCON HL only IIG 9501 03 Page 5 VCON USER MANUAL 2 0 UNPACKING Please inspect the instrument carefully for signs of shipping damage The unit is packaged to give maximum protection but
13. sired zero scale and full scale voltage or current output preferably into the actual circuit load resistance for greatest accuracy It may be necessary to repeat each adjustment to ensure correct calibration VCON TC Generally as for VCON HL However for applications in which automatic cold junction compensation is used it is necessary to ensure that the thermocouple simulator employed is switched to automatic cold junction compensation and is at the same ambient temperature as the VCON TC Note that this is not always easy to achieve especially if the VCON TC is mounted in a warm cabinet In such cases it is best either to calibrate the unit out of panel after allowing it to reach thermal equilibrium with ambient and the thermocouple simulator approx 30 mins or to measure the temperature at the VCON TC connector block and enter this as a manual cold junction compensation figure in the simulator For the most critical applications the optimum solution is to use a hot box ice box arrangement but this is seldom practicable If unit output has been reconfigured to give 4 20mA it is necessary to adjust the internal 4mA potentiometer to give 3 9mA with an input signal of 10mV applied to terminals 4 and 5 before carrying out the calibration from the front panel pots VCON RTD Generally as for VCON HL However if unit output has been reconfigured to give 4 20mA it is necessary to adjust the internal 4mA potentiometer to give 3 9mA with
14. t excitation only Thermocouple Inputs This applies to the thermocouple input device only VCON TC Thermocouples are connected to input terminals 4 negative and 5 positive The cold junction compensation is performed by an integral sensor located close and thermally connected to the input terminal The thermocouple type and range are given on the serial number label along with output response to sensor burnout RTD Inputs This applies to the resistance thermometer input device only VCON RTD RTDs or 2 wire potentiometers should be connected using three identical wires in order for measurement errors due to lead wire resistances to be eliminated The connections should be made as shown on the side panel label using terminals 4 5 and 6 Note that the wires connected to 4 and 6 are the common connection for the RTD or the end connection of the 2 wire potentiometer The RTD type and range or the 2 wire potentiometer details are given on the serial number label If a 2 wire connection is specified this will be recorded on the serial number label and terminals 4 and 6 will be internally linked A unit shipped for 3 wire operation can be used with a 2 wire connection by externally linking pins 4 and 6 Output Connections Regardless of output type the common return or negative of the output circuit should be connected to terminal 10 Similarly the positive connection should be made to terminal 12 IIG 9501 03 4 0 4 1 4 2 V
15. we can not guarantee that undue mishandling will not have damaged the instrument In the case of this unlikely event please contact your supplier immediately and retain the packaging for our subsequent inspection 2 1 Checking the Unit Type Each unit has a unique serial number label fig 1 below on which full details of the configuration are given These details should be checked to ensure conformance with your requirement EH Industrial Interf ae industrial Interface PART NUMBER Y CON H INPU 4 20m OUTPUT 4 20m SUPPLY 24y DC OPTIONS Tz SUPPLY NATO STOCE No SERIAL No V193 678 Fig 1 Serial Number Label VCON CONNECTION DETAILS 1 Power Input ve 2 Power Input ve 4 Process Input ve 10 Output ve 5 Process Input ve 12 Output ve 3 24v Output ve 6 24v Output ve or T C Shield or RTD 3rd Wire Fig 2 VCON Connection Details Page 6 IIG 9501 03 3 0 3 1 3 2 3 2 1 3 2 2 VCON USER MANUAL CONNECTIONS This section details the instrument connection information Before proceeding please check the information on the serial number label on one side of the unit to ensure that the unit configuration is correct Connection details are given on a label on the opposite side of the unit referring to the numbered connector terminals as shown in fig 2 above Power Supply The power supply is connected into t
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