ABB PS1-4-0-100 Industrial Safety Relay 4 Channel

ABB PS1-4-0-100 is a 3-phase busbar accessory for ABB's PS1 motor-protection and safety-relay lineup, designed to connect four MS116 or MS132 motor protectors within a single PS1 frame and rated for 100 A continuous current. It provides a compact 3-phase distribution for four protection channels, enabling safe, centralized wiring in PS1 panels that reduces wiring complexity while maintaining quick service access. The unit is specified for use with up to 690 V AC systems and uses a 17.5 mm pitch between connection points, supporting a tidy, standardized installation in industrial control cabinets. The part is identified by 1SAM201916R1104 and commonly listed as PS1-4-0-100 by ABB and major distributors, reflecting its role as a dedicated distribution module within the PS1 ecosystem. In practice, it facilitates modular motor protection deployments in automated equipment, such as conveyors, packaging lines, and other manufacturing processes that require four motor-protection channels in a compact footprint.