Appendix - Conair Thermolator TW-S User Manual

E xt e rn a l In t e r fac e s
Analog Remo t e Se t poi nt / Pr oc es s Tem p R e t r an s mi t
Con necting t o t he T her mo l a t or
WAR NIN G: Imp ro per i ns ta ll at ion, o pe r a t i o n , o r s e r v i c-
ing ma y re s ul t i n e qui pment da mag e o r p er so n a l
injur y.
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 th e Jump er s
See the table below for the proper jumper position. These jumpers are also shown on
sheet 4 of the electrical print.
Wir in g the ci rc ui t
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
Remote Temperature Setpoint
(Input)
Process Temperature Retransmit
(Output)
Terminal Wiring / Jumpers
0-10VDC
+
Remote Temperature
Setpoint (Input) Terminal 255
+
Process Temperature
Retransmit Terminal #5
(Output) on 10-pin
analog output
daughter card
See electrical print sheet 5 for terminal block locations.
0-10VDC
11kΩ internal controller impedance.

NOTE: Voltage or loop current source must be supplied by the external interface.
1kΩ minimum external impedance.

NOTE: Voltage or loop current is self-generated by the TCU's temperature controller.
4-20mA
- +
Terminal 254 Terminal 255
- +
Terminal #6 Terminal #3
on 10-pin on 10-pin
analog output analog output
daughter card daughter card
4-20mA
50Ω internal controller impedance.
500Ω maximum external impedance.
-
Analog Input Jumper Number
Terminal 254
Input #4 JMP10
J1-9 & J1-10
JMP11
JMP13
JMP22
-
Jumper Placement (4-
Terminal #4 Number 20mA)
on 10-pin
JMP1 Pins 2 & 3
analog output
For 0-10VDC operation, pins 3&4 must be connected
daughter card
together with an external jumper.
(continued)
Placement Placement
(4-20mA) (0-10V)
OUT OUT
OUT IN
IN IN
IN OUT
Placement (0-10V)
Pins 1 & 2
A p p e n d i x I E-1