Schneider Electric LA1-LB021 Pushbutton Contact Block

Schneider Electric LA1-LB021 auxiliary contact block is an accessory for Telemecanique LA1 pushbutton operators that provides four normally open (NO) contacts and one normally closed (NC) contact in a compact module. It uses screw-clamp terminals for secure, field wiring and is designed to mount with LA1 modular pushbuttons as part of Schneider Electric’s LA1 family, enabling additional signaling or interlock functions in automation panels without replacing the main operator. The 4 NO + 1 NC configuration supports multiple signaling paths or simple interlock logic in control circuits and PLC interfaces, making it a practical extension for machines that require extra contacts alongside a pushbutton. Schneider Electric notes that LA1-LB021 has not been replaced and that the reference was discontinued on July 12, 2021, a detail to consider when assessing current availability or planning new installations. If you’re maintaining an existing LA1 setup that already uses this block, the LA1-LB021 remains a compatible auxiliary option in the LA1 ecosystem, and you may want to consult Schneider Electric or a qualified distributor for suitable modern alternatives if a fresh design is planned.