Schneider Electric LADT4 Time Delay Relay Tesys

LADT4 is a TeSys Deca time-delay auxiliary contact block that adds a 10–180 s on-delay function to TeSys D IEC contactors, featuring 1 normally open (NO) and 1 normally closed (NC) contact and front mounting with screw clamp terminals. This compact block wires into the control circuit to delay the activation of the NO contact after energization, while the NC contact provides complementary signaling, enabling simple sequencing and interlock logic without a separate timer relay. It’s designed as an accessory to TeSys D devices, making it ideal for applications requiring staggered motor starts, conveyor sequencing, or other automated control loops where precise timing between control signals is needed. The LADT4’s front-mount, screw-terminal construction supports secure wiring in industrial panels, with the 10–180 second timing range suitable for short to medium-length delays in industrial automation contexts.