Allen-Bradley 1794-TB3/A FLEX I/O Terminal Base Unit
$123.00
$320.00
Description
Allen-Bradley 1794-TB3/A FLEX I/O Terminal Base Unit
The Allen-Bradley 1794-TB3/A, also cataloged as the 1794-TB3 3-Wire Terminal Base Unit, operates as a dedicated hardware component for field wiring termination and module mounting within the Allen-Bradley FLEX I/O system. It provides the physical interface between field devices and installed FLEX I/O modules through screw-clamp terminals.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-TB3/A |
| Brand | Allen-Bradley / Rockwell Automation |
| Origin | United States |
| Module Type | 3-Wire Screw-Clamp Terminal Base Unit |
| Product Line | FLEX I/O System |
| Number of Terminals | 36 screw terminals |
| Supported Wiring | 3-wire signal, return, and power/ground connections |
| Terminal Screw Torque | 0.86 Nm (7 lb-in) |
| Wire Size Range | 0.34 ... 2.1 mm2 (22 ... 14 AWG) solid or stranded copper wire |
| Voltage Rating | 125 V AC/DC max |
| Current Rating | 10 A max through power terminals |
| Mounting Options | 35 x 7.5 mm DIN rail or direct panel mounting |
| Operating Temp | -20 deg C to +70 deg C (-4 deg F to +158 deg F) |
| Storage Temp | -40 deg C to +85 deg C (-40 deg F to +185 deg F) |
| Relative Humidity | 5% to 95% non-condensing |
| Dimensions | 94 x 94 x 69 mm |
| Weight | 0.44 lbs |
EtherNet/IP and FLEX I/O Bus Interface Characteristics
The 1794-TB3/A functions as the terminal interface layer of the FLEX I/O architecture, providing mechanical retention and electrical termination for compatible FLEX I/O modules. The terminal base unit maintains field wiring separation and supports direct channel-level connections without additional external terminal blocks.
The FLEX I/O system uses modular I/O communication through the adapter and backplane interface. Proper module seating, terminal alignment, and wiring segregation maintain signal integrity for digital and analog I/O channels connected through the terminal base assembly.
Frequently Asked Questions
Q: Can the 1794-TB3/A be used as a standalone I/O module?
A: No. The 1794-TB3/A is a terminal base unit and requires a compatible FLEX I/O module installed on the base assembly to provide field signal processing.
Q: Does the 1794-TB3/A support direct 3-wire field device connection?
A: Yes. The terminal arrangement provides screw-clamp connections for 3-wire field wiring, including signal, return, and power/ground connections according to the installed I/O module requirements.
Q: Is the terminal base unit hot-swappable by itself?
A: The 1794-TB3/A is a passive mounting and wiring component. Hot-swap capability depends on the installed FLEX I/O module, adapter configuration, and system operating conditions.
Field Installation Guidelines
Install the 1794-TB3/A on a compatible 35 mm DIN rail or approved panel mounting surface. Verify that the terminal base is mechanically secured before installing the FLEX I/O module.
Terminate field wiring using the specified conductor size range and apply the recommended terminal screw torque. Separate signal wiring from high-voltage power conductors to reduce electrical interference.
Connect cable shields and grounding conductors according to the system grounding design. Confirm terminal assignments before energizing the circuit to prevent incorrect field device connections.
Maintain adequate spacing for module removal and inspection access. Ensure environmental conditions remain within the specified operating temperature and humidity limits.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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