120 VAC Input Module for SSR—The SSR-IAC5 senses voltage from a field source and converts AC voltage to a TTL logic signal. The SSR-IAC5 is fully encapsulated and plugs into an 8-, 16-, 24-, or 32-slot backplane or a shielded carrier. Field signals connect to screw terminals on the backplane, making it easy to swap or replace modules. You can use the SSR-IAC5 to monitor the state of a load or a sensor, such as a temperature switch or limit switch.