Rockwell / Allen-Bradley 1794-TB3 FLEX I/O Terminal Base Unit
Rockwell / Allen-Bradley Industrial Controllers & PLCs. Current: 10 A per terminal, Voltage: 125V AC/DC, Voltage: 125V continuous.
- Model
- Rockwell / Allen-Bradley 1794-TB3
- Calibration
- Available on request
- Price
- $65
- Status
- In stock
- RFQ ref
- 1794-TB3
This unit
The Rockwell/Allen-Bradley 1794-TB3 is a FLEX I/O Terminal Base Unit that is a wiring termination point for distributed I/O installations within Allen-Bradley FLEX I/O systems. The unit features 16 I/O terminals with 3-wire cage clamp connections and accommodates a total of 52 terminals - 18 common terminals and 18 supply terminals (+V). Operating at 24V DC/AC or 120V DC/AC with maximum supply voltage of 125V AC/DC, the TB3 supports current capacity up to 10 A per terminal.
DIN rail mounted in a compact 94 mm × 94 mm × 69 mm form factor, it accepts solid or stranded copper wire from 0.34 mm² to 4 mm² (22 AWG to 12 AWG) with terminal screw torque of 0.56–0.79 Nm.
Technical Specifications
- Model: 1794-TB3
- Termination Type: 3-wire cage clamp
- I/O Terminals: 16
- Total Terminals: 52 (18 common, 18 supply)
- Maximum Current: 10 A per terminal
- Supply Voltage: 125V AC/DC, 50/60 Hz maximum; 24V DC/AC or 120V DC/AC operational
- Isolation Voltage: 125V continuous; module-dependent ratings up to 60V AC or 75V DC
- Backplane & FlexBus Current: 640 mA @ 5V DC each
- Wire Size: 0.34–4 mm² (22–12 AWG); solid or stranded copper, 75°C rated
- Terminal Torque: 0.56–0.79 Nm (5–7 lb-in)
- Dimensions: 94 × 94 × 69 mm (3.7 × 3.7 × 2.7 in)
- Weight: ~0.249 kg (0.5 lbs)
- Mount: DIN rail
- Enclosure: IP20 open-style
Key Features
- Cage clamp termination simplifies wiring and maintenance
- Supports multiple FLEX I/O module types: digital, analog, temperature, and specialty I/O
- Operating temperature range: −20°C to 70°C (−4°F to 158°F)
- Storage temperature: −40°C to 85°C
- Rated for 30G shock and 5G vibration (10–500 Hz)
- UL, cULus, CE, and RoHS certified
Compatibility & Integration The TB3 integrates with FLEX I/O modules including 1794-IA8, 1794-OA8, 1794-IB8, 1794-OB8, 1794-IB16D, 1794-IT8, 1794-IRT8, 1794-IR8, 1794-IF4I, and 1794-OF4I. Network communication supported through Remote I/O, DeviceNet, ControlNet, and EtherNet/IP via appropriate adapter modules.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 120V DC/AC operational |
Rockwell / Allen-Bradley 1794-TB3 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Rockwell / Allen-Bradley 1794-TB3. Calibration covers I/O channel accuracy per specification, analog output and input calibration to rated accuracy, and functional communication interface test (serial, Ethernet, fieldbus). All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Rockwell / Allen-Bradley 1794-TB3 faults: blown I/O fuses, failed analog modules, power supply capacitor failure. Common faults include blown I/O protection fuses, failed analog I/O modules, power supply capacitor failure, and serial or Ethernet communication port damage.
Rockwell / Allen-Bradley 1794-TB3 price
This Rockwell / Allen-Bradley 1794-TB3 is listed at $65. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Rockwell / Allen-Bradley 1794-TB3 calibration cost
NIST-traceable calibration for the Rockwell / Allen-Bradley 1794-TB3 is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers I/O channel accuracy per specification, analog output and input calibration to rated accuracy, and functional communication interface test (serial, Ethernet, fieldbus). Turnaround is 1 to 3 business days after receipt. See full calibration details →
