ABB UA1-110 Industrial Control Relay Module for Automation Systems

ABB UA1-110 undervoltage release module for ABB manual motor starters (1SAM family) provides automatic disconnection of the control circuit when the supply voltage falls below its rated level, helping prevent damage from voltage dips in industrial automation systems. It is rated for 110 VAC at 50 Hz or 120 VAC at 60 Hz, making it compatible with control circuits fed from these voltages and designed to trip the associated contactor coil to stop the driven load. As an accessory to ABB’s 1SAM-series motor starters, the UA1-110 integrates with standard control circuits to deliver reliable protection for motors in applications such as conveyors, pumps, fans, and processing lines. By ensures that loss of adequate voltage leads to a safe de-energization of the starter, the UA1-110 supports safer startup sequences and reduces the risk of motor damage during undervoltage events. The UA1-110 belongs to ABB’s UA1 family of undervoltage releases and is specified for use with compatible ABB control gear to provide coordinated protection in automation schemes. When selecting this accessory, engineers specify control-supply voltages of 110 V AC (50 Hz) or 120 V AC (60 Hz) and pair it with the appropriate 1SAM motor starter configuration to achieve a dependable, fail-safe shutoff in the event of undervoltage, making it a precise fit for industrial motor control panels and distributed automation installations.