Johnson Controls System 450 Series Installation Instructions Manual page 2

Mounting System 450 Modules
Mount System 450 modules on 35 mm DIN rail
(recommended) or directly to an even wall 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 horizontally in a suitable location using
appropriate mounting hardware/fasteners.
2. Clip the control module on the rail, position the
upper DIN rail clips on the top rail, and gently snap
the lower clips on to the rail.
3. Clip the remaining modules to the right of the
control module on to the DIN rail and plug together.
To direct mount modules to wall surfaces:
1. Plug the modules together, remove the module
covers, place the assembly against wall surface
horizontally in a suitable location, and mark the
mount hole locations on the surface.
2. Install appropriate screw fasteners, leaving screw
heads approximately one to two turns away from
flush to the surface.
3. Place the assembly over screw heads and on the
mounting slots, and carefully tighten mount screws.
Note: If you mount the modules on an uneven
surface, do not damage the housings when
tightening mounting screws. Use shims/washers to
mount module assembly evenly on the surface.
Refer to the control sensor installation instructions for
information on locating and mounting control sensors.
Wiring
See Figure 2 and Table 1 for electrical termination
locations and wiring information. See Technical
Specifications on page 11 for electrical ratings.
WARNING: Risk of Electric Shock.
! Disconnect or isolate all power supplies
before making electrical connections.
More than one disconnect or isolation
may be required to completely
de-energize equipment. Contact with
components carrying hazardous voltage
can cause electric shock and may result
in severe personal injury or death.
IMPORTANT: Use copper conductors only. Make
all wiring in accordance with local, national, and
regional regulations.
2 System 450™ Series Control Modules with Analog Outputs Installation Instructions
IMPORTANT: Do not exceed the System 450
module electrical ratings. Exceeding module
electrical ratings can result in permanent damage to
the modules and void any warranty.
IMPORTANT: Do not connect 24 VAC supply
power to the System 450 modules before finishing
wiring and checking all wiring connections. Short
circuits or improperly connected wires can result in
damage to the modules and void any warranty.
IMPORTANT: Run all low-voltage wiring and
cables separate from all high-voltage wiring.
Shielded cable is strongly recommended for input
and output cables that are exposed to high
electromagnetic or radio frequency noise.
24V
C
Sn1
C
Common terminals (C)
are internally
connected.
+
Analog Analog
Controlled
Controlled
_ Device
Device
Low-Voltage
Analog Output Terminals
Figure 2: C450CxN-1 Wiring Terminals
Sn2
C
Sn3
5V
+
System 450
Control Module
_
with Analog
Outputs
(C450CQN-1)