Q. Which type of controller is used in PLC?
Answer
Operation-based PLCs are: 1. Transitor based PLC – Fast-switching operation (control stepper monitor)2. Relay based PLC – Normal-switching operation (On/Off)Size-based PLCs are:1. Modular – One can extend the limit of I/O module or external card2. Compact – One can not extend the limit of I/O
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