G4Q-RY2A

Description

This is a 16-point relay output module for the LS G4 series PLCs. It supports rated output for both AC and DC loads and is suitable for driving loads at moderate current.

The Polar Energy Assessment:

The Q4Q-RY2A module provides 16 relay output points, and this makes it suitable for when you need to switch loads via mechanical relays (motors. solenoids, etc.) rather than transistor outputs. The insulation method uses photo‐couplers, and the load voltage ranges include DC 12/24 V and AC 110/220 V depending on wiring.

Pros

• Mechanical relay outputs allow switching of higher-voltage or inductive loads that transistor outputs may struggle with.
• 16 points in one module gives decent density for moderate control applications.

Limitations

• Relay outputs tend to have slower switching and shorter mechanical lifespan compared to solid-state outputs.
• If many outputs are used, coil power consumption and heat may matter.

Typical use cases

• Panel designs where many actuator or load circuits require relay switching rather than transistor.
• Retrofit of LS G4 PLC racks where the existing I/O uses relay outputs.
• Situations where isolation and mechanical switching are preferred (for example, where loads may be AC and large).