Observe these additional guidelines when mounting
a controller in a panel or enclosure:
• Mount the controller so that the enclosure walls
do not obstruct cover removal or ventilation
through the controller.
• Mount the controller so that the power
transformer and other devices do not radiate
excessive heat to the controller.
• Do not install the controller in an airtight
enclosure.
Figure 2: Controller mounting positions
Mounting features and dimensions
Figure 3: Back of controller showing extended
mounting clips, DIN rail channel, and mounting
dimensions, mm (in.)
DIN rail mount applications
Mounting the controller horizontal on 35 mm DIN
rail is the preferred mounting method. To mount a
controller on 35 mm DIN rail, complete the following
steps:
1. Securely mount a 20 cm (8 in.) or longer section
of 35 mm DIN rail horizontally and centered in
the desired space so that the controller mounts
in the horizontal position.
2. Pull the two bottom mounting clips outward
from the controller to the extended position.
3. Hang the controller on the DIN rail by the hooks
at the top of the (DIN rail) channel on the back
of the controller, and position the controller
snugly against the DIN rail.
4. Push the bottom mounting clips inward (up) to
secure the controller on the DIN rail. To remove
the controller from the DIN rail, pull the bottom
mounting clips out to the extended position
and carefully lift the controller off the DIN rail.
Wall-mount applications
To mount the controller directly on a wall or other
flat vertical surface, complete the following steps:
1. Pull the two bottom mounting clips outward
and ensure they are locked in the extended
position.
2. Mark the mounting hole locations on the wall
using the dimensions in Figure 3 and one of the
mount positions shown in Figure 2. Or hold the
controller up to the wall or surface in a proper
mount position and mark the hole locations
through the mounting clips.
3. Drill holes in the wall or surface at the marked
locations, and insert appropriate wall anchors
in the holes (if necessary).
4. Hold the controller in place, and insert the
screws through the mounting clips and into the
holes (or anchors). Carefully tighten all of the
screws.
Important:
Do not overtighten the mounting
screws. Overtightening the screws may
damage the mounting clips.
IOM3733 Input/Output Module Installation Guide
3