ControlLogix System

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I/O Modules

Accessories—I/O Modules



Removable Terminal Blocks

Removable terminal blocks (RTBs) provide a flexible interconnection between your plant wiring and 1756 I/O modules. The RTB plugs into the front of the I/O module. The type of module determines which RTB you need. You can choose screw-clamp or spring-clamp RTBs.

RTBs are not shipped with I/O modules. You must order them separately. The standard housing on the front of the wiring arm is not deep enough for 2.5 mm² (14 AWG) wiring. If you plan to use 2.5 mm² (14 AWG) wiring, also order the extended housing.

Removable Terminal Blocks

Specifications [PDF]

Cat. No.	1756-TBNH	1756-TBSH	1756-TBCH	1756-TBS6H	1756-TBE
Description	20-position NEMA screw-clamp RTB	20-pin spring-clamp RTB with standard housing	36-pin cage-clamp RTB with standard housing	36-pin spring-clamp RTB with standard housing	Extended depth terminal block housing
Screw torque	0.8…1 N•m 7…9 lb•in		0.4 N•m 4.4 lb•in		—
Screwdriver width	8 mm (5/16 in.) max

Wiring Systems

As an alternative to buying RTBs and connecting the wires yourself, you can buy a wiring system of:

• interface modules (IFMs) that provide the output terminal blocks for digital I/O modules. Use the pre-wired cables that match the I/O module to the IFM.
  
• analog interface modules (AIFMs) that provide the output terminal blocks for analog I/O modules. Use the pre-wired cables that match the I/O module to the AIFM.
  
• I/O module-ready cables. One end of the cable assembly is an RTB that plugs into the front of the I/O module. The other end has individually color-coded conductors that connect to a standard terminal block.
  

For more information, go to the Allen-Bradley Industrial Controls Catalog, Terminal Blocks and Wiring Systems at: www.ab.com/en/epub/catalogs/12768/229240/229268/.

Or to select or configure a wiring system for your I/O module go to: http://raise.rockwellautomation.com/catalog/_0.asp?onKil=http://www.ab.com/raise.



PanelConnect Modules

A PanelConnect module and its sensor connection system connect sensors directly to I/O modules using convenient pre-built cables and connectors.

The PanelConnect module mounts on the enclosure and creates the correct seal for the entry of the sensor connections. You do not need to seal the opening where the sensor cables enter the enclosure, create custom connectors, or wire to those custom connectors.

For more information, go to the Rockwell Automation Product Directory, Terminal Blocks & Wiring Systems, and select Panel Connection Systems at: www.ab.com/industrialcontrols/products/terminal_blocks_and_wiring/panel_connection_systems/panel_connect_family.html.