The ABB 500BOM01 (order code: 1MRB150023R0002; often miswritten as 500B0M01) is a 24‑channel relay output module designed for ABB AC500 series PLC/DCS, dedicated to high‑reliability industrial switching control (valve actuation, motor start/stop, alarm triggering, and equipment on/off control). As a key component of ABB's 500 series I/O system, it integrates 24 independent electromechanical relay outputs, ABB FBP (Flexible Bus Protocol) for seamless AC500 CPU connection, and industrial‑grade surge/EMC protection. With IP20 front protection and -20°C to +70°C operating range, it delivers stable switching performance in harsh industrial environments (chemical plants, power stations, manufacturing lines).

The 500BOM01 1MRB150023R0002 provides 24 independent normally‑open (NO) relay output channels, each rated for 8A at 250V AC or 30V DC, suitable for driving motors, valves, contactors, and indicator lamps. It supports channel‑to‑channel isolation (2.5kV) to prevent cross‑interference, and each channel has overcurrent/short‑circuit protection (via external circuit breakers recommended). Output status is monitored via front‑panel LEDs, and non‑volatile fault logging records open/short circuit events for quick troubleshooting. The module uses electromechanical relays with >100,000 switching cycles for long service life.

• Integration: ABB FBP protocol; AC500 CPU/coupler compatible; distributed I/O expansion support            • Mounting: 35mm DIN rail; 120×100×65mm dimensions; control cabinet installation            • Power Supply: 24V DC redundant input (18‑30V); reverse polarity protection; separate logic/load power terminals            • Maintenance: Hot‑swap capable (system‑configured); front‑panel diagnostics; non‑volatile fault logging