Allen‑Bradley 1794‑TB3 Flex I/O Terminal Base Unit

Allen‑Bradley 1794‑TB3 is a terminal base unit for Flex I/O distributed automation system. It serves as wiring carrier for Flex I/O modules, providing screw terminal connections for field sensor, actuator and power cables, realizing physical wiring and signal transition between field devices and I/O electronic modules.

This terminal base supports direct mounting on DIN‑rail, allows hot‑swap replacement of I/O modules without disconnecting field wiring. It is widely used as spare part for manufacturing, water treatment and petrochemical distributed I/O cabinet maintenance and retrofit projects.

Main Specifications

• Brand: Allen‑Bradley (Rockwell Automation)
• Model: 1794‑TB3
• Product Type: Flex I/O Terminal Base Unit
• Mounting: Standard DIN‑rail mounting
• Wiring Type: Screw‑type terminal block
• Feature: Support hot‑swap of Flex I/O modules
• Compatibility: Matches standard 1794 Flex I/O electronic modules
• Housing: Industrial plastic enclosure
• Certification: UL, CE industrial compliance certification
• Operating Temperature Range: 0°C ~ +60°C

Core Functions

• Provide screw terminal interfaces for field sensor, actuator and power circuit wiring
• Realize signal transition between field cables and 1794 Flex I/O electronic modules
• Support hot‑swap function: ｒｅｐｌａｃｅ I/O module without removing field wiring
• DIN‑rail installation saves cabinet space for distributed I/O layout
• Stable mechanical structure ensures reliable connection in industrial cabinet environment
• Work cooperatively with various digital and analog Flex I/O electronic modules
• Simplify on‑site wiring work and facilitate subsequent equipment maintenance operations
• Modular split‑type design separates wiring base and electronic circuit module
• Reduce field re‑wiring workload during module failure replacement
• Offer reliable physical wiring foundation for distributed I/O signal acquisition system

Application Scenarios

• Automotive workshop Flex I/O distributed signal acquisition control cabinets
• Water supply and sewage treatment plant field distributed I/O station racks
• Petrochemical and chemical plant remote discrete and analog signal collection systems
• Energy plant auxiliary equipment on‑site distributed automation control units
• Metallurgy, cement industry workshop decentralized I/O wiring cabinets
• Packaging machinery and logistics conveying equipment Flex I/O automation projects
• Distributed I/O system renovation, terminal‑base replacement and cabinet upgrade projects
• 1794 Flex I/O station maintenance and spare‑parts backup for existing production lines
• Rockwell Allen‑Bradley Flex I/O spare‑parts inventory and on‑site maintenance supporting projects