Interfacing Polycold Cryochiller
24V DI/DO Remote Interface Installation and Operation Manual
Brooks Automation
5-22
214072 Revision B
24 V DI/DO Single Circuit Isolated
If a Polycold Cryochiller with the new 24V DI/DO isolated interface is replacing a PFC unit that used the
optional PFC isolated remote interface, please note that the Cryochiller isolated remote has some dif-
ferences. Please carefully review the wiring information in this section.
1. External power supply can be connected per customer requirements (reversible supply support)
2. Active HIGH inputs and active LOW outputs. - Wire as above.
3. Active LOW inputs and active HIGH outputs. - Wire as above but reverse polarity of external power supply
4. Active HIGH input and active HIGH outputs. - Connect GND signal at the INPUT_COMMON TERMINALS
(Pin 2, 14 and 24 of 37-Pin CPC connector) and +24V DC at the OUTPUT_COMMON TERMINALS (Pins 4, 6,
10 and 17 of 37-Pin CPC connector)
5. Active LOW inputs and active LOW outputs - Connect +24DC at the INPUT_COMMON terminals (Pins 2, 14
and 24 of 37-Pin CPC connector) and GND signal at the OUTPUT_COMMON terminals (Pin-4, 6, 10 and 17 of
37-Pin CPC connector)
Figure 5-12: 24V DI/DO Single Circuit Isolated
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