Auxiliary contact Schneider Electric LC1D18F7 for contactor, AC coil 110 V, 1 normally open + 1 normally closed

Schneider Electric LC1D18F7 is an auxiliary contact module for compatible contactors, providing one normally open (NO) and one normally closed (NC) contact. It is paired with a device that has a 3-pole, 18 A main contact rating and is operated by a 110 V AC coil; the auxiliary module extends control and interlocking options for motor starters, automation panels and industrial switching applications.

Advantages

The LC1D18F7 offers coordinated auxiliary contacts (1 NO + 1 NC) that expand control logic and interlock functions without changing the main power path. Its 110 V AC coil rating matches common control voltages, and the accessory is designed to integrate with standard contactor assemblies used in motor starters and control panels. Built to the brand’s industrial practices, it supports reliable signalling and basic control tasks within the contactor’s electrical limits.

Suitable for

• Extending control and signalling on contactors used with three-phase motors within the contactor’s rated current
• Interlocking and control logic circuits in automation panels
• Monitoring or indicating contactor status in industrial switching applications

When it may not be suitable

This auxiliary contact is not suitable where more auxiliary circuits are required than the single NO + NC set provides, or where a different coil voltage is needed. It should not be used as a replacement for main power contacts or in installations that demand higher continuous current than the associated contactor’s 18 A rating.

Key specifications

• Auxiliary contacts: 1 normally open (NO) + 1 normally closed (NC)
• Coil/control voltage (associated contactor): 110 V AC
• Compatible main contact arrangement: three-pole contactors (for three-phase loads)
• Intended use: signaling, interlocking and control extension for contactors used with motors and resistive loads
• Mounting: designed to attach to compatible contactor assemblies in electrical enclosures

How to use

Attach the auxiliary contact module to the matching Schneider Electric contactor according to the manufacturer’s mechanical and wiring instructions. Connect the NO and NC terminals into the control or signalling circuits where required. Ensure the control wiring matches the 110 V AC coil system of the contactor and protect the circuit with appropriate fuses or breakers. Verify correct operation of interlocks and indicator circuits during commissioning and include recommended motor overload or short-circuit protection in the overall installation.

What to consider before purchase

• Confirm compatibility with the contactor model you use and that the accessory fits mechanically
• Ensure a single NO + NC auxiliary contact set meets your control and interlock needs
• Verify the control system voltage is 110 V AC or that the contactor coil voltage matches your supply
• Consider required protective devices (overload relays, fuses, breakers) for the connected load

Usage recommendations

Combine the auxiliary contact and contactor with appropriate motor protection and short-circuit protection. Install in a clean, dry enclosure and follow manufacturer torque and wiring instructions to ensure reliable signalling and interlock performance.