Overview
The LADN223G is a Schneider TeSys Deca auxiliary contact block, order code LADN223G, with a 2 NO + 2 NC contact configuration rated for 6 A switching current. It mounts to the front of compatible TeSys Deca contactors and uses spring terminals for wiring. Rated insulation voltage is 690 V, and the block carries an IP20 enclosure rating for in-cabinet use.
Function & operation
This block provides four instantaneous contacts — two normally open and two normally closed — for signalling and interlocking circuits on TeSys Deca contactors. The 6 A switching current covers typical control loads such as PLC inputs, indicator lamps, and small relays. Rated making capacity is 140 A AC and 250 A DC per IEC 60947-5-1, with short-time ratings of 100 A for 1 s, 120 A for 500 ms, and 140 A for 100 ms at 60 °C. A non-overlap time of 1.5 ms on both energisation and de-energisation prevents simultaneous closure of NO and NC contacts — critical for safety interlock circuits.
Applications
Auxiliary contact blocks like the LADN223G are used in motor control centres, panel builder assemblies, and machine control cabinets to extend the signalling capacity of a contactor. Typical roles include status feedback to a PLC, enabling/disabling downstream devices, and forming interlock chains between contactors.