Chapter 2: Installing a ControlLogix 1756sc-CTR8-SC Module 2-3
Owner’s Guide 0300199-01 Rev. D
This equipment is classified as open equipment and must be installed (mounted)
in an enclosure during operation as a means of providing safety protection.
The conformally coated versions of the module meet or exceed the ANSI/ISA
71.04.2013 G3 Environment standard.
This module receives power through the 1756 chassis backplane from the fixed
or modular +5 VDC and +24 VDC chassis power supply.
230 mA 75 mA
Add this current to the requirements of all other modules in this chassis to
prevent overloading the chassis backplane.
A ControlLogix I/O module mounts in a ControlLogix chassis and uses a
Removable Terminal Block (RTB) to connect all field-side wiring. RTBs are not
included with your purchase.
When ordering RTBs, specify Allen Bradley Part Number:
• 1756-TBCH 36-pin Screw terminal RTB
• 1756-TBS6H 36-pin Spring clamp RTB
You receive the following components with your RTB:
• 1756-TBH standard-depth RTB housing.
• Wedge-shaped keying tabs and U-shaped keying bands.
• A generic RTB door label.
Use these components in all module applications. Use an optional extended-
depth cover (1756-TBE) or applications requiring heavy gauge wiring.
When installing the module in a chassis, it is not necessary to remove the
terminal blocks from the module. However, if the terminal blocks are removed,
use the write-on label located on the side of the terminal blocks to identify the
module location and type.
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