Din Rail Mount Applications - Johnson Controls FEC26 Installation Instructions Manual

• Mount the FEC on 35 mm DIN rail whenever
possible.
• Mount the FEC in the proper mounting position
(Figure 1).
• Mount the FEC on a hard, even surface whenever
possible in wall-mount applications.
• Use shims or washers to mount the FEC securely
and evenly on the mounting surface.
• Mount the FEC in an area free of corrosive vapors
and observe the Ambient Conditions in the
Technical Specifications section.
• Provide for sufficient space around the FEC for
cable and wire connections, easy cover removal,
and good ventilation through the controller (50 mm
[2 in.] minimum on the top, bottom, and front of the
controllers).
• Do not mount the FEC on surfaces prone to
vibration, such as duct work, or in areas where
electromagnetic emissions from other devices or
wiring can interfere with controller communication.
On panel or enclosure mount applications, observe
these additional guidelines:
• Do not install the FEC in an airtight enclosure.
• Mount the FEC so that the enclosure walls do not
obstruct cover removal or ventilation through the
controller.
• Mount the FEC so that the power transformer and
other devices do not radiate excessive heat to the
controller.
Figure 1: Controller Mounting Positions
2 FEC26 Extended Temperature Field Equipment Controller Installation Instructions
Figure 2: Back of FEC26 Controller Showing
Extended Mounting Clips, DIN Rail Channel, and

DIN Rail Mount Applications

DIN rail mounting is the preferred mounting method.
To mount an FEC on 35 mm DIN rail:
1. Securely mount a 20 cm (8 in.) or longer section of
35 mm DIN rail horizontal and centered in the
desired space so that the controller mounts in the
horizontal position shown in Figure 1.
2. Pull the two bottom mounting clips outward to the
extended position (Figure 2).
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 (Figure 2), and position the controller
snugly against the DIN rail.
4. Push the bottom mounting clips inward to secure
the controller on the DIN rail.
To remove the FEC from the DIN rail, pull the bottom
mounting clips out to the extended position and
carefully lift the controller off the DIN rail.