中文版
Description
The 1746-P4 is a power supply module for Allen-Bradley’s Siemens 1746 series PLC.
It supplies power to the SLC 500 system with input voltages of 85 to 132 volts AC or 170 to 250 volts, frequencies of 47 to 63 Hertz, output current capabilities of 5 volts DC 10 A, 24 volts DC 2.88 A, and user available current of 24 volts DC 1 a.
Power module and signal module are two different types of modules in PLC (programmable logic controller), their main differences are as follows:
1746-P4
Function: The main function of the power module is to provide power for the whole PLC system, convert the input AC to direct current, and provide stable working voltage for each module of the PLC. The signal module is responsible for receiving and sending various signals, such as analog signals, digital signals, etc., for realizing the input and output functions of PLC.
Interface: The power module usually has terminals connected to the bus on the PLC rack to provide power. The signal module has terminals connected to the PLC processor, input/output terminals, and field devices for transmitting signals.
Safety: The power module usually has overvoltage protection, overcurrent protection and other safety protection measures to ensure the stability and safety of the PLC system. The signal module usually does not have these protective measures, and mainly relies on the protection function of the PLC host to achieve security.
Stability: As the power supply part of the PLC system, the power module needs to provide stable power output to ensure the stable operation of the entire system. The signal module is mainly responsible for signal transmission and processing, and the stability requirements are relatively low.
In summary, the power module and the signal module play different roles in the PLC and have different functions and characteristics.
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