根据PLC输出端所带的负载是直流型还是交流型，是大电流还是小电流，以及PLC输出点动作的频率等，从而确定输出端采用继电器输出，还是晶体管输出，或品闸管输出。不同的负载选用不同的输出方式，对系统的稳定运行是很重要的。 电磁阀的开闭、大电感负载、动作频率低的设备，PLC输出端采用继电器输出或者固态继电器输出;各种指示灯、变频器/数字直流调速器的启动/停止应采用晶体管输出。 

The GE Versamax IC200CHS111 is a main base relay-style interposing i/o terminals. The GE Versamax IC200CHS111 has an expansion connector (j2) that can be used to attach to an interposing relay expansion base. GE Versamax also has a connector (j1) for attaching a cable from the connector Style i/o carrier and 50 box-style terminals for field I/o wiring and power connections.

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