2CDS200914R0001 ABB S2C-H6RU Auxiliary Contact 1CO UL

Why Choose the ABB S2C-H6RU Auxiliary Contact?

The ABB S2C-H6RU is a compact auxiliary contact with one changeover contact (1CO) designed for remote indication of the switching position of compatible ABB modular circuit protection devices. It provides a volt-free signalling contact that can be incorporated into control, monitoring and status-indication circuits.

As part of ABB's modular circuit breaker accessory range, the S2C-H6RU mechanically follows the operating position of the associated protective device. This enables external equipment such as PLC inputs, indicator circuits, building management systems and control relays to identify whether the connected breaker is in its ON or OFF position.

The S2C-H6RU is designed for UL 489 / UL 1077 applications and uses a 1CO changeover contact, providing normally open and normally closed signalling paths from a common terminal. Its modular construction allows straightforward integration alongside compatible ABB circuit breakers and supplementary protectors in electrical distribution boards and industrial control panels.

Key Advantages

• Provides reliable remote indication of circuit breaker switching position.
• 1CO changeover contact provides both normally open and normally closed signalling functions.
• Supports integration with PLCs, indication circuits and automation systems.
• Mechanically linked operation reflects the position of the associated protective device.
• Compact modular design for installation alongside compatible ABB devices.
• Useful for local and remote electrical system monitoring.
• Designed for compatible UL 489 / UL 1077 circuit protection systems.

Key Features

• ABB S2C-H6RU auxiliary contact.
• 1 changeover contact (1CO).
• Provides auxiliary status signalling from compatible protective devices.
• Changeover arrangement provides 1 NO + 1 NC signalling paths from a common contact.
• Suitable for control and monitoring circuits.
• Mechanical indication of associated device switching position.
• Compact modular accessory construction.
• Designed for UL 489 / UL 1077 modular circuit protection applications.

Reliable Circuit Breaker Status Signalling

Auxiliary contacts allow the mechanical position of a circuit protection device to be represented electrically in a separate monitoring or control circuit. The ABB S2C-H6RU follows the switching position of its associated device and changes the state of its 1CO contact, allowing remote equipment to receive a clear status signal.

This functionality is particularly useful in automated machinery, distribution systems and remotely monitored installations. The changeover arrangement gives panel designers both normally open and normally closed signalling options, allowing the S2C-H6RU to be incorporated into a wide variety of status indication, interlocking and supervisory circuits.

Typical Applications

• Remote circuit breaker status indication.
• Industrial machine control panels.
• Electrical distribution boards.
• PLC and automation system inputs.
• Building management and supervisory systems.
• Indicator lamp and annunciation circuits.
• Electrical interlocking and monitoring circuits.
• Compatible ABB UL 489 / UL 1077 modular protection assemblies.