Auxiliary contact Schneider Electric LC1D18B7 — AC contact rating 24 V

The Schneider Electric auxiliary contact LC1D18B7 provides supplementary switching points to extend the functionality of contactors and control circuits. Designed for integration with motor starters, control panels and automation systems, this auxiliary contact has an AC contact rating at 24 V and a multicolour actuator to allow visual identification of contact state. The compact design is intended for reliable auxiliary signalling, interlocking and feedback without modifying the main contactor assembly.

Advantages

The unit offers a standardized mounting interface for easy attachment to compatible contactors and a multicolour indication that simplifies status recognition during operation and maintenance. Its 24 V AC contact rating makes it suitable for common control voltage environments. The accessory is built to provide consistent electrical switching performance for auxiliary circuits while maintaining the electrical isolation of the primary power contacts.

Suitable for

• Adding auxiliary signalling to motor starters and contactor assemblies
• Interlocking and sequence control in automation panels
• Feedback circuits for PLCs and control relays operating at 24 V AC
• Retrofitting existing switchgear to provide additional contact points

Key specifications

• Contact type: auxiliary switching contacts compatible with standard contactors
• Rated contact voltage: AC 24 V for control circuits
• Indicator: multicolour actuator for visual state identification
• Mounting: designed for direct attachment to matching contactor bodies
• Function: supplementary signalling, interlocking and feedback switching

How to use

Install the auxiliary contact on the side or designated attachment point of a compatible contactor following the contactor manufacturer’s mechanical engagement procedure. Wire the auxiliary contacts into the control circuit so that the auxiliary contact closes or opens in response to the main contactor operation, using the 24 V AC control supply where required. Verify correct wiring and perform functional checks under no-load conditions before placing the circuit into full operation.

Recommendations

Use the auxiliary contact within the specified control voltage and current limits, mount it only on compatible contactors, and confirm correct mechanical engagement and secure electrical connections. For safety and longevity, integrate the component into circuits protected by appropriate overload and short-circuit protection and follow local electrical codes when connecting to PLCs or control relays.