Rockwell Automation 1756-HSC ControlLogix High Speed Counter Module - Manual (Page 52)

Rockwell Automation Publication 1756-UM007C-EN-P - November 2011
52 Install and Wire the ControlLogix High-speed Counter Module
3. Slide the locking tab down to lock the RTB onto the module.
Remove the Removable
Terminal Block
If you need to remove the module from the chassis, you must first remove the
RTB from the module. Do these steps to remove the RTB.
1. Unlock the locking tab at the top of the module.
2. Open the RTB door by using the bottom tab.
20854-M
WARNING
When you connect or disconnect the Removable Terminal Block
(RTB) with field side power applied, an electrical arc can occur.
This could cause an explosion in hazardous location
installations.
Be sure that power is removed or the area is nonhazardous
before proceeding.