Installing System 450 Components; Locating System 450 Modules; Mounting - Johnson Controls Penn System 450 Series Technical Bulletin

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 mount is 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 Technical Specifications on page 67.
• 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 the modules in airtight enclosures.
• 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.
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.
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.)
36 System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin