Allen-Bradley 1794-TB3G FLEX I/O Terminal Base Unit, 3-Wire Grounded Screw Clamp
Allen-Bradley 1794-TB3G is a FLEX I/O terminal base unit with 3-wire grounded screw clamp terminations for the 1794 Flex, FlexEx and FlexXT I/O systems.
Overview
The 1794-TB3G carries the field wiring while any FLEX I/O module plugs on top — modules can be replaced without disturbing a single wire. It is rated 31.2 V AC/DC at 10 A with 2500 V DC isolation, accepts 24…16 AWG wire at a terminal screw torque of 0.56 to 0.79 Nm, and clips to a 35 mm DIN rail. Operating range is a wide -20 to 70 °C with 5 to 95% non-condensing humidity.
Key Features
- FLEX I/O terminal base unit — 3-wire grounded, screw clamp terminations
- Rated 31.2 V AC/DC, 10 A; isolation 2500 V DC
- Wire size 24 to 16 AWG; terminal screw torque 0.56…0.79 Nm
- 50/60 Hz; DIN rail mount; modules hot-swappable without rewiring
- Operating -20…70 °C; storage -40…85 °C; 5…95% RH non-condensing
- Vibration resistance 5 g @ 10…500 Hz
Technical Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Product Line | FLEX I/O (1794) |
| Series | FLEX I/O 1794 |
| Part Number / Catalog No. | 1794-TB3G |
| UPC | 612598180233 |
| Product Type | Flex I/O Terminal Base Unit |
| Terminal Type | Screw Clamp, 3-Wire Grounded |
| Supply Voltage Rating | 31.2 V AC/DC |
| Current Rating | 10 A |
| Isolation Voltage | 2500 V DC |
| Wire Size | 24 to 16 AWG |
| Terminal Screw Torque | 0.56 to 0.79 Nm |
| Frequency | 50/60 Hz |
| Dimensions | 12 x 8 x 6 cm (4.7 x 3.1 x 2.4 in) |
| Weight | 0.56 lbs (0.26 kg) |
| Operating Temperature | -20 to 70 °C (-4 to 158 °F) |
| Relative Humidity | 5 to 95% (non-condensing) |
Applications
Use the 1794-TB3G wherever a grounded 3-wire termination is required — analog and sensor channels that need a separate ground reference, or any FLEX I/O bank where shielded field wiring must be landed cleanly. Because the electronics live in the module and the wiring lives in the base, module swaps take seconds and never touch field wiring.
Why Buy from Us
This terminal base is available new in original factory packaging, fully tested and backed by a standard warranty of 1 year. We ship worldwide with careful protective packaging and fast dispatch. Quantity discounts and repair/exchange options are available on request.
Documents
| Resource | Title | Link |
|---|---|---|
| Publication | 1794-IN092 — FLEX I/O Terminal Base Units Installation Instructions (English) | 1794-in092_-en-p.pdf |
| Publication | 1794-PP019 — FLEX I/O Product Profile (English) | 1794-pp019_-en-p.pdf |
