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ABB NF31E-13 1SBH137001R1331 Contactor Relay  

1. Key Parameters

• Product Model: NF31E-13
• Order Code: 1SBH137001R1331
• Product Series: ABB NF-Series Industrial Contactor Relays (Control Loop Signal Conversion)
• Core Function: 1× NO (Normally Open) + 3× NC (Normally Closed) contacts; AC coil; DIN rail mounting; galvanic isolation; compatible with standard PLC/DCS outputs.

2. Core Features

• Compact Multi-Contact Design: 1NO+3NC contacts support diverse control logic (e.g., main contactor drive + status feedback), saving cabinet space vs. multiple single-contact relays.
• High Isolation: 4kVrms coil-to-contact isolation blocks electrical noise between controllers and load circuits, protecting sensitive PLC I/O.
• Medium-Load Driving: 6A contact rating reliably drives main contactor coils (common in LV systems), eliminating the need for separate power amplifiers.
• DIN Rail Compatibility: 22.5mm narrow width fits dense rail layouts, adapting to crowded control cabinet environments.

3. Application Fields

• Main Contactor Control: Isolates PLC outputs to drive AC contactor coils (e.g., AF-series) in motor control loops.
• Automation Signal Switching: Routes status signals (via NC contacts) and control commands (via NO contacts) in packaging, assembly, or material handling equipment.
• Auxiliary Circuit Protection: Acts as a intermediate switch for solenoid valves or indicator lights in power distribution auxiliary systems (e.g., transformer cooling fan control).

4. Precautions

• Compatibility: Match coil voltage to system control power (AC 230V); avoid exceeding 6A contact rating to prevent contact overheating.
• Installation: Ensure correct contact wiring (NO/NC distinction); torque terminals to 0.5~0.7 N·m; separate relay wiring from high-power cables (>10A) to reduce EMI.
• Maintenance: Inspect contacts annually for oxidation/arcing; replace if contact wear exceeds 0.5mm; check coil energization status quarterly.
• Spare Parts: Use genuine ABB NF31E-13 (1SBH137001R1331) units—non-genuine relays may have weak isolation or unstable contacts, causing control loop failures.

The structure and details of the product：

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