DUAL CHANNEL SIGNAL CONDITIONER FOR TEMPERATURE SENSORS SEM1720 DUAL CHANNEL WITH 5 PORT ISOLATION (3.75 kV) ACCEPTS RTD, THERMOCOUPLE OR POTENTIOMETER SENSORS UNIVERSAL VOLTAGE AND CURRENT OUTPUTS MATHS FUNCTIONS BETWEEN CHANNELS PROBE REDUNDANCY SWITCHING EIGHT USER CONFIGURED PRESET RANGES ONBOARD PROFILER TEMPERATURE TO OUTPUT PROCESS UNITS INTRODUCTION SEM1720 is a dual channel signal conditioner designed to accept RTD, Thermocouple or Potentiometer sensors and provide isolated, industrial process output signals in mA or Volts. Each output channel may be linked to either input sensor or to a maths function of both sensor signals. This powerful feature allows the device to operate in a number of different modes. The output signal can also be adjusted over the full working ranges (0 to 20) mA or (0 to 10) V, to provide common or custom process signals, examples (4 to 20) mA, (0 to 1) mA, (1 to 5) V. SEM1720 is configured using the free USB SpeedLink software that allows the user to configure the device without requiring calibration equipment. Maths functions on each channel can be set up using the software as well as a 22 segment profile tool. Input output simulation tools for diagnostic purposes are also available. The device offers the user eight preset ranges selected by removing the front panel and setting a three position switch. This allows the user to store configurations in the device rather than programme the device on site. POWER CONNECTIONS SEM1720 + (20 to 240) Vdc or (20 to 240) Vac POWER SUPPLY - INPUT CONNECTIONS OUTPUT CONNECTIONS CH2 INPUT + + - V Powered mA + - - Tc + - CONTROLLER Additional Data :- Tag number, Ext powered mA Profiler , CH2 OUTPUT Slide Maths Rtd Diagnostics Wire + + - CH1 8 switch V Powered mA INPUT selected pre-set + - - ranges Tc CH1 OUTPUT + - CH2 CH1 Ext powered mA OUTPUT CH1 Slide Rtd Wire USB DIN RAIL MOUNT DUAL SIGNAL TEMPERATURE/ISOLATOR/SPLITTER PC CONFIGRATION Equipment Computer Running Windows XP or later with USB port Profiler USB Cable A to mini B Optional advanced mode User linearization 22 segment. Maths signal to process units. Method Load PC with USB SpeedLink software. OUTPUTS (Channels 1 & 2) Connect device USB port to PC USB port using cable. Run software, set configuration required and save to device. Output channels can be independently set to monitor one of Maths temperature signal or profiler output. Source (Advanced Mode Only) SPECIFICATIONS 20 C Fixed output provided for diagnostics. PROFILE A INPUTS (Channels 1 & 2) PROFILE B PROFILE A + PROFILE B RTD Average, PROFILE A, PROFILE B Type Pt100,Ni100,Ni120,Cu100,Cu53 PROFILE A - PROFILE B User Range Any range within full range Absolute (Unsigned result) PROFILE A - PROFILE B Connection Three wire Highest PROFILE A or PROFILE B Accuracy See tables Lowest PROFILE A or PROFILE B Stability See tables Excitation < 450 uA Current Range Full Range (0 to 20) mA Thermocouple User Range Any range within full range Type K,J,T,R,S,N,B,C,D,U,G,(mV) Max Range (0 to 23.1) mA User Range Any range within full range Calibration Accuracy 5 uA Impedance 1 M Stability 5 uA / C Accuracy See tables Current sink Supply voltage (10 to 30) V dc Stability See tables Loop Voltage effect 0.2 uA / V (Sink Mode) Cold junction (-20 to 70) C 0.5 C Current source Max Load 700 R Tracking 0.05C/C Output Connection Screw Terminal Slide Wire Voltage Range Type (0 to 100) K Ohm pot maximum Full Range (0 to 10) V (0 to 1) K Ohm minimum User Range Any range within full range User Range any range within full range Max Range (0 to 10.1) V Connection Three wire plus link Accuracy 5 mV Accuracy 0.05% Stability 1 uV / C Voltage Load Min 1 K Output Connection Screw Terminal Signal Preset Type User software preset Isolation (To BS EN 61010) Supply to Input/Output Sensor Offset Working Voltage 253 V ac Range 10 C Isolation test voltage 4000 V dc Input output ports Maths Functions Max Voltage (fault) 250 V ac User set Setpoint SP1, SP2 Isolation test voltage 3750 V dc Note: USB terminal shares the same GND as CH1 output User selects CH1, CH2 General Specification CH1 + CH2 Update time 200 mS Average CH1, CH2 Response Time 200 mS CH1 - CH2 Start up time 4 seconds Absolute (Unsigned result) CH1 - CH2 Preset Ranges 8 Switch select user configured Highest CH1 or CH2 Lowest CH1 or CH2 Supply CH1 < SP1 = CH1 else CH2 Range (20 to 240) V DC, CH1 > SP1 = CH1 else CH2 (20 to 240) V AC 50/60 Hz CH2 < SP2 = CH2 else CH1 Power 3 W full output CH2 > SP2 = CH2 else CH1 current CH1 on fail SP1 Protection Internal fuse (0.5 A) CH1 on fail CH2 + Over Voltage protection. CH2 on fail SP2 External protection CH2 on fail CH1 recommended