Motorola V186 - Cell Phone - GSM System Planner Manual page 28

Digital Output Relay Modules
DOs will keep the last value they had at the time they were frozen. Freeze mode enables
testing the inputs and outputs while the user program is running.
Note: In systems with I/O expansion, the power supplies on I/O expansion frames can be
attached via DC cable to the power supply on the previous I/O expansion frame in a
daisy-chain manner, or directly to the main power supply. In this case, the 12V DO
control on the main power supply can control all DO EE relays in the entire RTU that
were configured by dip switch for 12V DO. This enables the user to inhibit all DO EE
relays in the entire RTU simply by removing the plug from the 12V DO control in the
main power supply.
24