Allen-Bradley 1794-TB2 Flex I/O Cage Clamp Terminal Base Unit
Configured for field signal termination and module backplane interfacing in Allen-Bradley Flex I/O networks, the Allen-Bradley 1794-TB2 (1794-TB2 Terminal Base Unit) provides direct physical/electrical execution. This 2-wire termination base incorporates cage clamp connection points supporting up to 16 I/O connections with 18 common and 2 voltage terminals rated for up to 125 VAC/DC at 10 A per terminal.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-TB2 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.50 lbs (0.23 kg) |
| Dimensions | Standard Flex I/O Base Dimensions |
| Operating Temp | -20 to +55 deg C |
| Power Consumption | Passive Component / Rated 125 VAC/DC max |
| Termination Type | Cage clamp terminals |
| Wire Size Capacity | 0.21 to 1.3 mm2 (24 to 16 AWG) |
| Maximum Terminal Current | 10 A per terminal |
| Terminal Configuration | 18 common terminals, 2 voltage terminals |
| Isolation Voltage | 125 V continuous insulation barrier |
| Terminal Screw Torque | 0.56 to 0.79 Nm (5 to 7 in-lbs) |
| Operating Shock Resistance | 30 g operating / 50 g non-operating |
Backplane Bus Communication Velocity & EtherNet/IP Deterministic Networks
The 1794-TB2 terminal base unit routes internal backplane signal buses continuously across adjacent modules, maintaining low jitter communication velocity between functional I/O cards and EtherNet/IP adapter modules. Continuous 125 V galvanic isolation barriers shield backplane logic processing from common-mode voltage spikes and field wiring noise. The mechanical chassis handles operational mechanical shocks up to 30 g without interrupting backplane contact continuity or signal integrity.
Frequently Asked Questions
Q: What wire gauge size is compatible with the cage clamp terminals on the 1794-TB2?
A: The cage clamp terminals accept solid or stranded conductors ranging from 0.21 to 1.3 mm2 (24 to 16 AWG).
Q: What is the recommended tightening torque for the terminal screws on the 1794-TB2?
A: Terminal screws should be tightened to a torque rating between 0.56 and 0.79 Nm (5 to 7 in-lbs) to ensure secure electrical contact.
Q: How many common and voltage terminals are available on the 1794-TB2 base?
A: The unit features 18 common terminals and 2 dedicated voltage terminals to support 16 I/O signal lines and field power distribution.
Field Installation Guidelines
- Snap the 1794-TB2 terminal base onto a grounded TS35 DIN rail or secure it to an enclosure plate using mounting holes.
- Slide the unit laterally into the adjacent Flex I/O terminal base until the internal Flexbus backplane connectors fully engage.
- Strip signal wire ends to specified length and insert them into cage clamp terminals, tightening screws to 0.56 to 0.79 Nm torque.
- Adjust the module mechanical keying dial on the base to match the position required for the targeted 1794 functional module.
- Verify field circuit voltage levels do not exceed the 125 VAC/DC continuous rating or 10 A terminal current limits.
Allen-Bradley 1794-TB2 Flex I/O Cage Clamp Terminal Base Unit
Allen-Bradley 1794-TB2 Flex I/O Cage Clamp Terminal Base Unit
Configured for field signal termination and module backplane interfacing in Allen-Bradley Flex I/O networks, the Allen-Bradley 1794-TB2 (1794-TB2 Terminal Base Unit) provides direct physical/electrical execution. This 2-wire termination base incorporates cage clamp connection points supporting up to 16 I/O connections with 18 common and 2 voltage terminals rated for up to 125 VAC/DC at 10 A per terminal.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-TB2 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.50 lbs (0.23 kg) |
| Dimensions | Standard Flex I/O Base Dimensions |
| Operating Temp | -20 to +55 deg C |
| Power Consumption | Passive Component / Rated 125 VAC/DC max |
| Termination Type | Cage clamp terminals |
| Wire Size Capacity | 0.21 to 1.3 mm2 (24 to 16 AWG) |
| Maximum Terminal Current | 10 A per terminal |
| Terminal Configuration | 18 common terminals, 2 voltage terminals |
| Isolation Voltage | 125 V continuous insulation barrier |
| Terminal Screw Torque | 0.56 to 0.79 Nm (5 to 7 in-lbs) |
| Operating Shock Resistance | 30 g operating / 50 g non-operating |
Backplane Bus Communication Velocity & EtherNet/IP Deterministic Networks
The 1794-TB2 terminal base unit routes internal backplane signal buses continuously across adjacent modules, maintaining low jitter communication velocity between functional I/O cards and EtherNet/IP adapter modules. Continuous 125 V galvanic isolation barriers shield backplane logic processing from common-mode voltage spikes and field wiring noise. The mechanical chassis handles operational mechanical shocks up to 30 g without interrupting backplane contact continuity or signal integrity.
Frequently Asked Questions
Q: What wire gauge size is compatible with the cage clamp terminals on the 1794-TB2?
A: The cage clamp terminals accept solid or stranded conductors ranging from 0.21 to 1.3 mm2 (24 to 16 AWG).
Q: What is the recommended tightening torque for the terminal screws on the 1794-TB2?
A: Terminal screws should be tightened to a torque rating between 0.56 and 0.79 Nm (5 to 7 in-lbs) to ensure secure electrical contact.
Q: How many common and voltage terminals are available on the 1794-TB2 base?
A: The unit features 18 common terminals and 2 dedicated voltage terminals to support 16 I/O signal lines and field power distribution.
Field Installation Guidelines
- Snap the 1794-TB2 terminal base onto a grounded TS35 DIN rail or secure it to an enclosure plate using mounting holes.
- Slide the unit laterally into the adjacent Flex I/O terminal base until the internal Flexbus backplane connectors fully engage.
- Strip signal wire ends to specified length and insert them into cage clamp terminals, tightening screws to 0.56 to 0.79 Nm torque.
- Adjust the module mechanical keying dial on the base to match the position required for the targeted 1794 functional module.
- Verify field circuit voltage levels do not exceed the 125 VAC/DC continuous rating or 10 A terminal current limits.
