Watlow 8PID Controller - Manual (Page 24)

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5.0 CONTROL OUTPUTS
Control output boards are plugged into rear slots on the main circuit board as follows:
ANAFAZE 8 PID serial numbers above 2000 only.
Loop Slot
1 OUT 1
2 OUT 2
3 OUT 3
4 OUT 4
5 OUT 5
6 OUT 6
7 OUT 7
8 OUT 8
Comm COMM (communications interface)
Note: Use caution when inserting or removing boards. Power must be off and care must
be taken to align the pins and insert the boards without bending the pins. Different plug-
in boards allow a variety of outputs as shown in this DIAGRAM:
WARNING -- GROUND LOOP POTENTIAL
The ground of every control output card is connected to the
ANAFAZE 8 PID logic ground. Use caution when connecting
external devices that may have their low side at a voltage other than
controller ground, since potential ground loops can be created. Use
isolated relays or the isolated analog output card if possible
grounding problems are expected.
5.1 TIME PROPORTIONING VOLTAGE
Time proportioning boards are available with voltage output primarily intended to drive
optically-isolated solid-state relays. For relay outputs, or contactors the output should be
connected through optically-isolated solid-state relays. The output is 6vDC at
approximately 6ma. Terminal A for each loop is connected to the plus input on the relay,
terminal B to the minus input.