Siemens PS407 Power Supply Module Inquiry Item

Description

PS407 is the rack power supply module for Siemens SIMATIC S7-400 PLC system. It supports wide-range AC/DC input, supplies stable 5V DC power to the backplane bus for CPU and I/O modules, and provides 24V DC auxiliary output. It integrates battery backup function for data retention during power failure, with built-in fault diagnosis and status LED indicators. It can be used in redundant configuration to improve system reliability, widely applied in petrochemical, power plant and metallurgy DCS and safety control systems.

Specification

Model: PS407 Brand: Siemens Series: SIMATIC S7-400 Input: 85~264V AC / 88~300V DC Output: 5V DC, 24V DC Mounting: Plug-in on S7-400 rack Backup: Support battery for RAM data retention Certification: CE, UL Protection grade: IP20

Component and Fault Diagnosis

It includes switching power circuit, battery holder, fault detection circuit, status LED indicators and backplane connector. Common faults: No 5V backplane output, power alarm, battery failure, overvoltage shutdown, module overheating.

Disclaimer

This spare part shall be installed, calibrated and maintained by qualified instrument technicians. Confirm rack slot and power load before commissioning.