GM4-PA1A

Description

AC 100-120V power supply module for the GLOFA GM4 PLC family, providing 5VDC and 24VDC outputs for CPU and I/O modules.

The Polar Energy Assessment:

The GM4-PA1A is a compact power supply unit that mounts in the GM4 main or expansion base, converting 100-120VAC input to stable DC outputs for powering the CPU, peripherals, and I/O modules. It features dual 5VDC rails (one for I/O at 4A, one for peripherals at 1A) plus 24VDC at 0.7A, ensuring reliable operation in standard industrial setups. Adheres to GM4 series voltage and topology standards.

Pros

• Dual 5V rails separate I/O and peripheral power for noise isolation.
• High output current supports up to 8-12 modules in a base.
• Built-in protection against overvoltage and short circuits.

Limitations

• Limited to 100-120VAC input; not suitable for 220VAC regions without transformer.
• Lower capacity than PA2 series for very large configurations.

Typical use cases

• Powering small to medium GM4 PLC racks in North American or Japan-based systems, OEM panels with mixed I/O, basic automation lines requiring stable DC supply.