Arbor Technology ARES-1980 Series, User Manual

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Appendix
Appendix A. 16-bit DIO Signal Connections
A.1. Isolated Digital Input Connections
The input (IN-C) will accept supply voltages. Make sure the Von (IN-C to IN)
is more than 12V and Voff (IN-C to IN) is less than 5V. The following diagram
shows the connection between outside signal and the system.
PLC (NPN Output)
System Isolated Digital Input
OUT
IN
IN-C COM(-)
Note that the input's (IN-C) first and last pins are for VCC.