1sna031845r1100 – bnms-t125vdc-1

Why Choose the TE Connectivity BNMS-T125VDC-1 Optocoupler Plug?

The TE Connectivity BNMS-T125VDC-1, manufacturer part number 1SNA031845R1100, is an industrial 125 V DC input optocoupler plug designed for compatible Entrelec PLC wiring and Interfast MS interface systems. It provides solid-state electrical isolation between a high-voltage DC input signal and the associated control-side circuitry, making it a practical interface component for industrial automation and control applications.

Designed specifically for 125 V DC input applications, the BNMS-T125VDC-1 operates across an input voltage range of approximately 93.5–140 V DC. Unlike an electromechanical relay, its optocoupler-based design provides signal transfer without mechanically operated contacts, supporting dependable interfacing in applications where electrical separation and compact installation are important.

The BNMS-T125VDC-1 has a narrow width of just 5 mm, a height of 34.5 mm and a depth of 38 mm. With a net weight of approximately 4 g, pollution degree 2 construction and a UL94 V-0 flammability classification, it is designed for high-density industrial interface installations where panel space and serviceability are priorities.

Key Advantages

• Purpose-designed 125 V DC input optocoupler plug for industrial control systems.
• Provides solid-state electrical isolation between input signals and control-side circuitry.
• Wide 93.5–140 V DC input operating range for compatible 125 V DC systems.
• No mechanically operated switching contacts in the optocoupler signal path.
• Only 5 mm wide, supporting high-density interface installations.
• Plug-in construction supports convenient integration and servicing in compatible Entrelec interface systems.

Key Features

• TE Connectivity / Entrelec BNMS-T125VDC-1 optocoupler plug.
• Designed as an input optocoupler.
• Nominal input voltage of 125 V DC.
• Input operating range of approximately 93.5–140 V DC.
• Part of the Entrelec Interfast MS / PLC wiring system.
• Compact dimensions of 5 × 34.5 × 38 mm.
• Pollution degree 2.
• UL94 V-0 flammability classification.

Solid-State Signal Isolation for Industrial Control Systems

Input optocouplers are used to transfer electrical signals between circuits while maintaining galvanic separation between the input and control sides. This isolation can help protect sensitive automation electronics and provides a practical method of adapting field-level signals for use within PLC and industrial control architectures.

The BNMS-T125VDC-1 provides this functionality for 125 V DC input circuits in a compact plug-in format. Its solid-state operating principle and narrow construction make it particularly suitable for high-density control panels where reliable signal isolation, organised wiring and straightforward servicing are required.

Typical Applications

• 125 V DC industrial signal interfacing.
• PLC input isolation and signal conditioning.
• Industrial control panels and electrical cabinets.
• Machine control and factory automation systems.
• Process control and monitoring equipment.
• Compatible Entrelec Interfast MS interface installations.