Carrier PC211 specifications Module Address, SW1 SW2

Notes on Module Operation

1.The machine operator monitors and modifies configurations in the microprocessor through the 4 softkeys and the LID. Communication with the LID and the PSIO is accomplished through the CCN bus. The communication between the PSIO, SMM, and both 8-input modules is accomplished through the sensor bus, which is a 3-wire cable.

On sensor bus terminal strips, Terminal 1 of PSIO module is connected to Terminal 1 of each of the other modules. Terminals 2 and 3 are connected in the same manner. See Figure 41, Figure 42, Figure 43, Figure 44, and Figure 45. If a Terminal 2 wire is connected to Terminal 1, the system does not work.

2.If a green LED is solid on, check communication wiring. If a green LED is off, check the red LED operation. If the red LED is normal, check the module address switches (Figure 41, Figure 42, Figure 43, Figure 44, and Figure 45). Proper addresses are:

Module	Address
	SW1	SW2
SMM (Starter Management Module)	3	2
8-input Options Module 1	6	4
8-input Options Module 2	7	2