If all modules indicate communications failure, check communications plug on the PSIO module for proper seating. Also check the wiring (CCN bus — 1:red, 2:wht, 3:blk; Sensor bus — 1:red, 2:blk, 3:clr/wht). If a good connection is assured and the condition persists, replace the PSIO module.
If only one
All system operating intelligence rests in the PSIO module. Some safety shutdown logic resides in the SMM in case communications are lost between the 2 modules. The PSIO monitors conditions using input ports on the PSIO, the SMM, and the
3.Power is supplied to modules within the control panel via
The transformers are located within the power panel, with the exception of the SMM, which operates from a
Within the power panel, T1 supplies power to the LID, the PSIO, and the