1) RS232 Asynchronous Communications
J2-A, J2-B, and J2-C
RJ45 Jacks
2) RS232 Synchronous Communications
J4-A and J4-B
DB25 Female
3) Optically Isolated INPUTS
J3, pins 5 through 8
4-position Phoenix FMC 1,6/ 4-ST3,5
Phoenix Part Number 1952283
Optically Isolated OUTPUTS
J3, pins 1 through 4
4-position Phoenix FMC 1,6/ 4-ST3,5
Phoenix Part Number 1952283
4) LED Displays D1 through D4
Assignments are application dependent
1 4 2 3