Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual page 67

Dimensions and drill patterns are shown here:
b. Drill and tap for # 10 (or M4) screws.
c. Start the mounting screws (supplied by the user) in the drilled
holes.
d. Hang the Rack on the screws at the top.
e. Mark the locations for the bottom screws.
f. Drill and tap for # 10 (or M4) screws.
g. Remove the rack from the enclosure.
2. Aluminum grounding bars for the I/O module wiring are optional.
They can be mounted at the top, at the bottom, or at the top and
bottom of the rack, as indicated below. If grounding bars are
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