Overview
Manuals
Wire size
Best Practices for Installation
Compatibility Check
Features:
- 36-pin cage-clamp removable terminal block
- Standard-depth ControlLogix housing
- 0.5 N·m screw torque
- 0.33 to 2.1 mm² single-wire range
The Allen-Bradley 1756-TBCH is a 36-pin cage-clamp removable terminal block supplied with the standard ControlLogix housing. It creates the field-wiring interface for compatible 1756 I/O modules and allows the wiring arm to be unplugged from the module during maintenance.
The RTB accepts one conductor per terminal up to 2.1 mm² or two conductors within the manufacturer double-wire limits. The exact I/O module determines whether this RTB is permitted, and an extended 1756-TBE housing is required when the larger 2.5 mm² wiring arrangement is used.
The Allen-Bradley 1756-TBCH is an active ControlLogix wiring accessory for compatible standard I/O modules.
Allen-Bradley 1756-TBCH ControlLogix 36-Pin Cage-Clamp Removable Terminal Block Manuals(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Single wire connection: 0.33…2.1 mm2 (22…14 AWG) solid or stranded copper wire rated at 105 °C (221 °F), or greater, 1.2 mm (3/64 in.) insulation max. Do not wire more than one conductor on any single terminal. Double wire connection: 0.33…1.3 mm2 (22…16 AWG) solid or stranded copper wire rated at 105 °C (221 °F), or greater, 1.2 mm (3/64 in.) insulation max. Do not wire more than two conductors on any single terminal.
Wiring Sequence: Always wire from the bottom terminals (pins 35/36) upwards. This ensures unobstructed access to the top terminals and facilitates operation with hand tools.
Stress Relief: Securely fasten thick multi-core field cables with cable ties using the built-in bottom mounting slot.
Physical Keying: Mechanically connect the RTB to its designated module using the plastic keying wedges on the edge connectors. This prevents installers from accidentally plugging AC terminals into low-voltage DC or analog cards.
High-Density Cabling Considerations: If you are using the maximum gauge wire (14 AWG) on all 36 pins, the standard housing included with the 1756-TBCH may make cabling too crowded. It is recommended to replace it with a deeper housing (1756-TBE) to easily accommodate denser cabling.
Compatibility Check:
- Match the exact 1756 I/O module
- Confirm 36-pin RTB requirement
- Use standard non-safety housing
- Select 1756-TBE for extended depth
Do not substitute a safety RTB or housing; verify the I/O module installation instructions and conductor requirements before wiring.
