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- 1756-TBNH
- ControlLogix ControlNet Communication Module
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- 13.8 × 11.2 × 5.2 cm
- 0.19kg
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Industrial Technical Report – 1756-TBNH ControlLogix Removable Terminal Block Housing
Product Overview
The 1756-TBNH is a removable terminal block housing designed for ControlLogix I/O systems. It provides a secure interface between industrial field wiring and ControlLogix input/output modules, enabling reliable signal transmission and simplified maintenance operations.
This model uses a screw-clamp terminal design, making it suitable for applications requiring strong wire retention, stable electrical contact, and long-term operational reliability in demanding industrial environments.
The removable housing structure allows maintenance personnel to disconnect field wiring quickly without rewiring the entire system, significantly reducing equipment downtime during servicing or module replacement.
Brand Information
The product belongs to a globally recognized industrial automation ecosystem specializing in programmable logic controllers, industrial networking technologies, distributed I/O architectures, and process automation systems.
It is widely used in:
- Industrial automation systems
- Manufacturing control systems
- Process industries
- Energy infrastructure systems
- Heavy industrial machinery applications
Key characteristics include:
- Reliable screw-clamp wiring connection
- Modular removable structure
- High-density field wiring support
- Industrial-grade durability
- Simplified maintenance operation
Product Series
ControlLogix Wiring & Terminal Accessories Series
The 1756-TBNH belongs to the ControlLogix removable terminal block housing family designed for modular PLC systems.
Key system features include:
- 36-position removable terminal block design
- Screw-clamp field wiring interface
- Front-access terminal arrangement
- Fast installation and maintenance support
- High compatibility with ControlLogix I/O modules
Compatible module categories include:
- Digital input modules
- Digital output modules
- Analog input modules
- Analog output modules
- Specialty control modules
The terminal housing is engineered for structured industrial cabinet wiring environments.
Technical Parameters
Detailed Specification Table
| Parameter | Specification |
|---|---|
| Model | 1756-TBNH |
| Product Type | Removable Terminal Block Housing |
| Series | ControlLogix Wiring Accessories |
| Terminal Type | Screw-clamp terminal |
| Terminal Positions | 36 positions |
| Wiring Method | Screw terminal connection |
| Compatible Wire Size | 0.33–2.1 mm² |
| Compatible AWG | 14–22 AWG |
| Mounting Type | Direct module attachment |
| Connection Access | Front-access wiring |
| Retention Method | Locking latch mechanism |
| Conductor Compatibility | Copper industrial wiring |
| Housing Material | Industrial thermoplastic |
| Insulation Rating | Industrial-grade insulation |
| Replaceable Under Maintenance | Yes |
| Wiring Density | High-density terminal arrangement |
| Field Wiring Retention | Excellent mechanical retention |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Vibration Resistance | Industrial rated |
| Shock Resistance | Industrial rated |
| Flame Rating | UL94-V0 |
| EMC Compatibility | Industrial environment compliant |
| Dimensions | 13.8 × 11.2 × 5.2 cm |
| Weight kg（ ） | ~0.19 kg |
Product Description
The 1756-TBNH is designed to provide a durable and maintenance-friendly field wiring solution for ControlLogix automation systems. It creates a removable electrical interface between field devices and PLC modules while maintaining secure screw-terminal wiring integrity.
Its removable design allows technicians to replace I/O modules without disconnecting field-side wiring, improving maintenance efficiency and minimizing production interruption.
The screw-clamp connection system provides strong wire retention, making the housing suitable for environments exposed to vibration, electrical noise, and continuous industrial operation.
Product Applications
Industrial Automation Systems
Used in:
- PLC control cabinets
- Production line control systems
- Conveyor automation systems
- Industrial machine control panels
Manufacturing Industry
Applied in:
- Automotive assembly systems
- Robotics installations
- Packaging machinery
- CNC machine systems
Process Control Systems
Used in:
- Chemical processing facilities
- Pharmaceutical production systems
- Food and beverage automation
- Water treatment plants
Energy & Utility Systems
Used in:
- Power generation control panels
- Renewable energy systems
- Utility automation equipment
- Electrical distribution systems
Infrastructure Applications
Used in:
- Transportation control systems
- Building automation systems
- Public utility management
- Industrial infrastructure monitoring
Product Advantages
1. Strong Screw-Terminal Connection
Provides reliable and stable wiring retention.
2. Removable Wiring Structure
Simplifies maintenance and module replacement.
3. High Wiring Density
Supports compact industrial cabinet layouts.
4. Industrial Durability
Designed for harsh operating environments.
5. Reduced Maintenance Downtime
Allows rapid servicing without rewiring.
6. Excellent Mechanical Stability
Performs well under vibration and industrial stress.
Recommended Models (Same Series or Related)
ControlLogix Wiring Accessories & Related Modules
| Model | Type | Function | Key Feature | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-TBNH | Terminal Block Housing | Screw terminal wiring | 36-position removable RTB | 13.8×11.2×5.2 cm | 0.19 kg |
| 1756-TBCH | Terminal Block Housing | Cage clamp wiring | Quick wire insertion | 13.8×11.2×5.2 cm | 0.18 kg |
| 1756-TBS6H | Terminal Block | Spring clamp connection | Compact high-density design | 13.5×11×5 cm | 0.17 kg |
| 1756-TBE | Terminal Expansion Accessory | Wiring expansion | Modular field interface | 14×11×5 cm | 0.20 kg |
| 1756-IF16 | Analog Input Module | Signal acquisition | 16-channel analog input | 14.8×14.2×3.8 cm | 0.32 kg |
| 1756-OB16E | Digital Output Module | DC output control | 16-point electronic output | 14×13.5×3.5 cm | 0.26 kg |
Recommended Popular Models (Same Platform Ecosystem)
Widely Used ControlLogix Modules
| Model | Function | Network | Role | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-L85E | PLC Controller | EtherNet/IP | Main processor unit | 15×14×13 cm | 0.65 kg |
| 1756-EN2TR | Ethernet Module | EtherNet/IP | Industrial communication | 13×14×12 cm | 0.48 kg |
| 5069-L320ER | Advanced PLC | EtherNet/IP | High-performance automation | 13×10×9 cm | 0.54 kg |
| 1734-AENTR | I/O Adapter | EtherNet/IP | Remote I/O gateway | 7×7×7 cm | 0.20 kg |
| 1769-L36ERM | Compact PLC | Ethernet | Mid-range controller | 15×11×10 cm | 0.75 kg |
Installation Notes
Correct installation improves connection reliability and long-term system stability.
Key requirements:
- Use compatible industrial wire sizes
- Tighten screw terminals according to torque requirements
- Ensure latch locking after installation
- Avoid excessive cable pulling force
- Keep wiring organized for maintenance access
Maintenance Characteristics
- Minimal maintenance requirement
- Easy removable terminal structure
- Fast field replacement capability
- High mechanical reliability
- Long operational service life
Final Summary
The 1756-TBNH is a removable screw-terminal block housing designed for ControlLogix systems, providing secure and organized field wiring connections for industrial automation applications.
Its primary strengths include reliable screw-terminal retention, simplified maintenance procedures, and durable industrial construction, making it suitable for demanding control cabinet environments where stable long-term wiring performance is essential.