XBE-RY08B

Description

8-point relay output module with isolated Form A contacts, designed for switching AC or DC loads where galvanic isolation is required. Rated ~2 A per point for resistive loads, with one point per common for independent switching. Removable terminal blocks included for fast panel wiring.

The Polar Energy Assessment:

The RY08B is an independent-relay output card in the XGB expansion family that provides eight isolated relay outputs, suitable for switching mains or DC loads, pilot coils, and similar devices. It’s specified for approx. 2 A per contact, AC up to 250 VAC and DC up to 125 V maximums, has a low off-leakage spec, and mounts via the standard XGB expansion interface; mechanical life and on/off frequency limits are given in the vendor datasheet.

Pros

• True galvanic relay isolation, so you can switch AC mains or DC loads safely.
• Independent commons, one point per COM, simplify mixed-load wiring.
• Removable terminal blocks and standard footprint for quick integration.

Limitations

• Mechanical relays limit switching frequency compared with transistor outputs; not for high-speed PWM switching.
• Typical per-point rating is modest (2 A), so use contactors or drivers for heavier loads.

Typical use cases

• Switching lamps, heaters, solenoid valves, or driving contactors for larger motors.