System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin
35
Assembling System 450 Modules
After selecting the System 450 components for your control system, you must assemble the modules. Figure 2 on
page 7 shows an example of a System 450 module assembly.
Observe the following guidelines when assembling System 450 modules:
• Always locate the control module on the left side of the module assembly.
• Always plug the System 450 power module (when used) into the right side of the control module.
• Plug the expansion modules together, in any order, on the right side of the System 450 power module or on the
right side of the control module when an external 24 V power supply is used instead of a System 450 power
module. (See Wiring System 450 Components
on page 36 for information on wiring an optional external
24 VAC supply power to System 450 control systems that do not include a power module.)
Installing System 450 Components
Locating System 450 Modules
Observe these guidelines when locating and mounting System 450 modules:
• Ensure that the mounting surface can support the module assembly, DIN rail, mounting hardware, and any
(user-supplied) panel or enclosure.
• Mount the modules in a horizontal, upright orientation wherever possible. DIN rail mounting is strongly
recommended.
• In direct-mount applications, mount the modules on flat and even surfaces.
• Mount the modules in a location free of corrosive vapors and observe the ambient operating conditions in the
Related Documentation
on page 61.
• Allow sufficient space for making connections, running wires, and viewing the LCD.
• Do not mount the modules on surfaces that are prone to vibration or in locations where high-voltage relays and
motor-starters, electromagnetic emissions, or strong radio frequency may cause interference.
• Do not install heat generating devices in an enclosure with the modules that may cause the ambient
temperature to exceed 66°C (150°F).
Mounting
Mount System 450 modules on 35 mm DIN rail (recommended) or directly to a flat, even surface.
To mount the modules on DIN rail:
1. Provide a section of 35 mm DIN rail that is longer than the module assembly width, and mount the DIN rail in a
suitable location using appropriate mounting hardware.
2. Clip the control module on the rail, position the module’s upper DIN rail clips on the top rail, and gently snap the
lower clips on to the bottom of the rail.
3. Clip the remaining modules to the right of the control module on to the DIN rail and gently slide and plug the
modules together. (If a System 450 power module is used, mount the power module on the right side of the
control module so that the power module plugs directly into the control module.)
IMPORTANT: When mounting a module assembly on a DIN rail, clip the modules on to the DIN rail
individually before gently sliding and plugging the mounted modules together on the DIN rail. Clipping a
complete module assembly that is already plugged together on to the DIN rail can damage the 6-pin modular
plugs and void any warranties.
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