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ROC827 Instruction Manual
Issued Mar-06 Installation and Use 2-7
2.3.3 Removing and Installing Module Covers
Before you insert an I/O or communications module, remove the module
cover over the empty module slots in which you intend to install the
modules. Although you are not required to remove the power to the
ROC827 to perform this procedure, caution is always advisable when
working with a powered ROC827.
Caution
To avoid circuit damage when working inside the unit, use appropriate
electrostatic discharge precautions (such as wearing a grounded wrist
strap).
When working on units located in a hazardous area (where explosive
gases may be present), make sure the area is in a non-hazardous state
before performing procedures. Performing these procedures in a
hazardous area could result in personal injury or property damage.
To remove a module cover:
1. Remove the wire channel cover.
2. Unscrew the two captive screws on the face of the cover.
3. Using the tab at the left side of the removable terminal block, pull the
module cover straight out from the ROC827 housing.
Note: If you remove a module for an extended period, install a module
cover plate over the empty module slot to keep dust and other matter from
getting into the ROC827.
To install a module cover:
1. Place the module cover over the module slot.
2. Screw the two captive screws on the module cover plate.
3. Replace the wire channel cover.
2.4 Mounting the ROC827 on a DIN Rail
When choosing an installation site, be sure to check all clearances.
Provide adequate clearance for wiring and service. The ROC827 mounts
on Type 35 DIN rails and requires two strips of DIN rail. Refer to Figures
2-1, 2-2, and 2-3.
Note: English measurement units (inches) appear in brackets in the
following figures.