Johnson Controls IOM2723, Installation Manual

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Observe these additional guidelines when mounting
an expansion module in a panel or enclosure:
• Mount the expansion module so that the
enclosure walls do not obstruct cover removal or
ventilation through the expansion module.
• Mount the expansion module so that the power
transformer and other devices do not radiate
excessive heat to the expansion module.
• Do not install the expansion module in an airtight
enclosure.
Figure 2: Mounting positions
Mounting features and dimensions
See the following figure for mounting dimensions
listed in millimeters and inches. Inches are listed
in parenthesis. The following figure also illustrates
the DIN rail channel and the mounting clips in an
extended position.
Figure 3: Back of expansion module
DIN rail mount applications
Mounting the expansion module horizontally on 35
mm DIN rail is the preferred method.
To mount an expansion module on a 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 expansion
module mounts in the position shown in Figure
2.
2. Pull the two bottom mounting clips outward
from the expansion module to the extended
position (Figure 3).
3. Hang the expansion module on the DIN rail
by the hooks at the top of the DIN rail channel
on the back of the expansion module (Figure
3), and position the expansion module snugly
against the DIN rail.
4. Push the bottom mounting clips inward (up) to
secure the expansion module on the DIN rail.
To remove the expansion module from the DIN rail,
pull the bottom mounting clips out to the extended
position and carefully lift the expansion module off
the DIN rail.
Wall mount applications
To mount an expansion module 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, as shown in Figure 3.
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. You can
also hold the expansion module 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).
IOM2723 Input/Output Module Installation Guide 3