Product Name:FLEX I/O Terminal Base Units
Brand Name:Allen-Bradley
Model Number:1794-TB3
Country of Origin:USA
Warranty:12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Allen-Bradley |
Model Number: |
1794-TB3 |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Parameter |
Specification |
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Catalog Number |
1794-TB3 |
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Manufacturer |
Rockwell Automation / Allen-Bradley |
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Series |
FLEX I/O |
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Termination Type |
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I/O Terminals |
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Common Terminals |
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Supply Voltage Terminals |
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Max Supply Voltage |
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Current Capacity (I/O) |
2A max per terminal |
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Backplane Current Draw |
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Isolation Voltage |
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Wire Size |
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Strip Length |
5–6 mm (0.20–0.24 in.) |
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Terminal Screw Torque |
0.56–0.79 Nm (5–7 lb-in) |
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Dimensions (H x W x D) |
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Weight |
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Mounting |
DIN rail |
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Operating Temperature |
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Hazardous Location Approval |
Class I, Division 2, Groups A, B, C, D; Zone 2 |
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Certifications |
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Conformal Coating Option |
Available (K suffix: 1794-TB3K) |
The 1794-TB3 is a 3-wire cage-clamp terminal base unit from Allen‑Bradley’s FLEX I/O family, providing the physical and electrical interface between FLEX I/O modules and field devices. This 1794-TB3 base offers 16 I/O terminals, 18 common terminals, and 18 voltage terminals, supporting up to 132V AC/156V DC and 10A. The cage-clamp design of the 1794-TB3 ensures secure, vibration-resistant terminations. Ideal for distributed I/O architectures, the 1794-TB3 snaps onto DIN rail and plugs together to form the backplane.
Cage-Clamp Termination: Screw-type clamping for secure, vibration-resistant connections
High-Density Design: 16 I/O points with 18 common and 18 supply terminals
Hot-Swappable: Supports Removal and Insertion Under Power (RIUP)
Keyswitch Protection: Prevents incorrect module installation
Daisy-Chain Capability: Supports power and communication daisy-chaining
Hazardous Location Ready: Class I Division 2 and Zone 2 approved
Conformal Coating Option: K‑suffix models (1794-TB3K) resist noxious gases
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Operating Temperature |
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Storage Temperature |
-40°C to +85°C |
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Relative Humidity |
5–95% non-condensing |
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Vibration |
5 g @ 10–500 Hz (operating) |
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Operating Shock |
30 g |
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Non-Operating Shock |
50 g |
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Conformal Coating |
Optional (K suffix) for corrosive gas environments per ISA/ANSI-71.04 Class G3 |
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Hazardous Location |
Class I Div 2, Groups A-D; ATEX/IECEx Zone 2 |
Q1: What is the difference between the 1794-TB3 and the 1794-TB3S?
A1: The 1794-TB3 uses cage-clamp (screw) termination, while the 1794-TB3S uses spring-clamp termination for tool‑free wiring.
Q2: What wire sizes does the 1794-TB3 accept?
A2: It accepts 24–16 AWG (0.21–1.3 mm²) stranded copper wire rated at 105°C or higher.
Q3: Can the 1794-TB3 be used in hazardous locations?
A3: Yes, it is approved for Class I Division 2 Groups A, B, C, D and ATEX/IECEx Zone 2 hazardous locations.
Q4: Does the 1794-TB3 support hot-swapping?
A4: Yes, the FLEX I/O system supports Removal and Insertion Under Power (RIUP) for module replacement without system shutdown.
Q5: What does the "K" suffix mean on models like 1794-TB3K?
A5: The "K" suffix indicates conformal coating, providing protection against noxious gases per ISA/ANSI-71.04 Class G3 environments.
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