Watlow 8PID Controller - Manual (Page 21)

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4.9 CURRENT TRANSMITTER INPUTS
Current inputs are accommodated by placing resistors in the input section to convert the
current input into a voltage. Different current input ranges are accommodated by
selecting the proper resistor values. In general RC is selected to maintain a low source
resistance. RA and RC produce the input full scale of 60mv. The positive input should be
connected to the AUX terminal, and the negative input to the LOW terminal.
The following input values are suggested:
4 to 20 ma 0 to 10 ma
RA = 93.3 ohms RA = 26.7 ohms
RB = 20.0 ohms RB = 20.0 ohms
RC = 20.0 ohms RC = 20.0 ohms
Please note section 4.5 regarding the shield connection.
Please note section 4.11 regarding scaling and calibration.
4.10 INFRARED NON-CONTACT TEMPERATURE SENSORS
The ANAFAZE 8 IRSM infrared sensing module is ideally suited for many infrared non-
contact temperature applications. It can be supplied by ANAFAZE as a fully integrated
system with the controller configured to provide sensor power and for direct connection
of the sensor input. The following connections are required if the IRSM internal ambient
sensor is not used:
ANAFAZE 8 PID IRSM WIRES
Pin Color Function
AUX A Orange Signal out
HIGH -- no connection --
LOW B White Signal ground
SHLD K Shield Shield
SPARE 1 (+5vdc) E Red +5vdc supply
SPARE 2 (pwr gnd) C Black power ground
SPARE 2 (pwr gnd) J Brown no peak hold
No connections D Green +15vdc supply
F Blue Ambient sensor
H Yellow Track and hold
Resistor Values -- input is 0 to 10ma for 0 to 1000 deg F
RA RA = 26.7 ohms
RB RB = 20.0 ohms
RC RC = 20.0 ohms
RD RD = not used
If desired a second input can be used to monitor the IRSM internal ambient temperature.
Please consult ANAFAZE for additional information.