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- A-B 1797-TB3 | FLEX Ex Terminal Base Unit (Screw Cage)
  
  Manufacturer: Allen‑Bradley (Rockwell Automation)
  
  Model: 1797-TB3
  
  Type: FLEX Ex Intrinsically Safe Terminal Base
  
  Series: 1797 FLEX Ex (Hazardous Location I/O)
  
  Status: Discontinued (spare parts only)
  
  Warranty: 12 months
  
  Certifications: ATEX, IECEx, UL, CSA, CE (Ex ib IIB/IIC T4, Class I Div 1)
  
  Specifications
  - Terminals: 52 total (1×16 + 2×18 rows)
  - Connection: Screw‑cage (torque 0.8–1.0 Nm)
  - Rating: 125 V AC/DC, 10 A per channel
  - Isolation: Channel‑to‑channel (module‑dependent)
  - Operating Temp: ‑20 °C to +70 °C
  - Protection: IP20 (enclosure)
  - Mounting: DIN rail, panel/wall (optional kit)
  - Dimensions (W×H×D): 94 × 94 × 69 mm
  - Weight: ~0.25 kg
  Key Features
  1. Hazardous Location Rated: Intrinsically safe for Zone 1 / Division 1 explosive areas.
  2. 52‑Point Termination: Flexible layout for FLEX Ex I/O modules.
  3. Screw‑Cage Design: Reliable, vibration‑resistant connections.
  4. Backplane Bus: Integrated Flexbus connector for daisy‑chaining I/O.
  5. Compact & Rugged: DIN rail mount, wide temperature range for harsh environments.
  Applications
  - Oil & gas, petrochemical, refining, offshore platforms
  - Hazardous‑area FLEX Ex I/O termination & distribution
  - Rockwell ControlLogix systems in explosive atmospheres

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A-B 1797-TB3 | FLEX Ex Terminal Base Unit (Screw Cage)

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Allen-Bradley

1797-TB3

PLC Module

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