Appendix I E-1
External Interfaces
Analog Remote Setpoint / Process Temp Retransmit
Connecting to the Thermolator
WARNING: Improper installation, operation, or servic-
ing may result in equipment damage or personal
injury.
External analog signals must be fully isolated from ground. Be sure to use fully
isolated analog channels and/or power supplies. Analog wires must not be
common or referenced to earth ground! Failure to heed this requirement will
permanently damage the analog circuits in the TCU.
Setting the Jumpers
See the table below for the proper jumper position. These jumpers are also shown on
sheet 4 of the electrical print.
Wiring the circuit
Sheet 4 on the electrical print illustrates the proper way to wire the remote interface. You
can choose either 4-20mA or 0-10VDC, not both simultaneously.
Circuit Impedance Requirements
0-10VDC 4-20mA
Remote Temperature Setpoint
(Input)
11kΩ internal controller impedance. 50Ω internal controller impedance.
NOTE: Voltage or loop current source must be supplied by the external interface.
Process Temperature Retransmit
(Output)
1kΩ minimum external impedance. 500Ω maximum external impedance.
NOTE: Voltage or loop current is self-generated by the TCU’s temperature controller.
Terminal Wiring / Jumpers
0-10VDC 4-20mA
Remote Temperature
Setpoint (Input)
+
Terminal 255
-
Terminal 254
+
Terminal 255
-
Terminal 254
Analog Input Jumper Number Placement
(4-20mA)
Placement
(0-10V)
Input #4
J1-9 & J1-10
JMP10 OUT OUT
JMP11 OUT IN
JMP13 IN IN
JMP22 IN OUT
Process Temperature
Retransmit
(Output)
+
Terminal #5
on 10-pin
analog output
daughter card
-
Terminal #6
on 10-pin
analog output
daughter card
+
Terminal #3
on 10-pin
analog output
daughter card
-
Terminal #4
on 10-pin
analog output
daughter card
Jumper
Number
Placement (4-
20mA)
Placement (0-10V)
JMP1 Pins 2 & 3 Pins 1 & 2
For 0-10VDC operation, pins 3&4 must be connected
together with an external jumper.
See electrical print sheet 5 for terminal block locations.
(continued)
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