Overview
The Allen-Bradley 1794-TBN Flex I/O Terminal Base is a standard termination unit from Rockwell Automation’s distributed I/O platform. This terminal base provides secure field wiring connections for Allen-Bradley Flex I/O output modules in industrial automation systems. With its NEMA-style screw clamp design and robust construction, the 1794-TBN delivers reliable performance in panel and DIN-rail mounted control cabinets.
Key Features
- 16 I/O connection points with 2 common terminals and 2 +voltage terminals
- NEMA-style screw clamp terminations for secure wire connections (0.34–3.3 mm² / 22–12 AWG)
- 250V AC/DC voltage rating with 10A maximum current capacity
- 5V DC FLEXBUS supply with 640 mA capability for module communication
- Operating temperature range of –20 to +70°C with storage capability to +85°C
- Supports both panel and DIN-rail mounting configurations
- UL, CE, CSA, CUL certified for international compliance
Technical Specifications
- Catalog Number: 1794-TBN
- Termination Type: NEMA Screw Clamp
- I/O Connections: 16 I/O points; 2 common; 2 +V terminals
- Voltage Rating: 250V AC/DC at 50–60 Hz
- Maximum Current: 10 Amperes
- FLEXBUS Rating: 5V DC, 640 mA
- Wire Size: 0.34–3.3 mm² (22–12 AWG), copper, 75°C rated minimum
- Terminal Screw Torque: 1.4 Nm (12 lb-in)
- Operating Temperature: –20 to +70°C (–4 to +158°F)
- Storage Temperature: –40 to +85°C (–40 to +185°F)
- Mounting Options: DIN Rail, Panel-mount
- Enclosure: Open-style (no fuse protection)
- Dimensions: 94 × 94 × 69 mm
- Weight: 0.42 lb (0.19 kg)
- Certifications: UL, CE, CSA, CUL, KC, GOST
Typical Applications
- Distributed I/O control in manufacturing and process industries
- Field device termination in machinery control systems
- Industrial plant automation requiring remote digital and analog I/O
- Material handling and assembly line controls
- HVAC, power distribution, and utility automation systems
- OEM machine builder control panel integration
Compatibility & Replacements
Compatible With
- Flex I/O 1794 series digital input modules (1794-IA8, 1794-IA16, 1794-IA32)
- Flex I/O 1794 series output modules (1794-OA8, 1794-OA8I, 1794-OW8, 1794-OW8XT)
- Flex I/O analog and specialty modules
- CompactLogix and ControlLogix controllers via FLEXBUS
- Rockwell Studio 5000 development environment
- EtherNet/IP and local FLEXBUS networks
Replaces / Drop-In Replacement For
- 1794-TBN series terminal bases (same catalog number across revisions)
- Verify model compatibility with your system integrator or distributor before ordering
Works With
- Studio 5000 Logix Designer software for I/O configuration
- Allen-Bradley CompactLogix L35E, L36E controllers
- ControlLogix 5580 and 5580E processors
- FLEXBUS distributed I/O architecture
- EtherNet/IP industrial networks
- Integrated safety modules and communication adapters
