Installation Instructions

Document No. 553-087
Installation Instructions
August 15, 2006
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their
respective owners. © 2006 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
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Document No. 553-087
Country of Origin: US
Page 4 of 4
Mounting the PXC Compact in an
Enclosure
WARNING:
Turn OFF AC power to the enclosure at the
circuit breaker panel.
Steps for Installing with a DIN Rail
1. Attach the DIN rail to the backplane of the
enclosure.
2. Align the channel on the back of the PXC
Compact with the DIN rail (see Figure 1).
3. Push in each mounting tab until it clips onto the
DIN rail.
4. Continue with Completing the Installation.
Steps for Installing without a DIN Rail
NOTE: Use the 3/8” self-tapping screws and, if
necessary, the 1-3/4” self-drilling screws for
this installation.
1. Carefully align the mounting holes of the PXC
Compact with holes in the perforated backplane
of the enclosure.
2. If necessary, drill holes to match the PXC
Compact mounting holes with the backplane.
3. Secure the controller using the provided 3/8”
screws and, if necessary, the 1-3/4” screws.
4. Continue with Completing the Installation.
Completing the Installation
Terminate wires to both the 24 Vac connector
and the appropriate point connectors (see
Figure 2 and Figure 3).
NOTE: Do not connect power to the PXC
Compact at this time.
CAUTION:
Adjacent point connections on the PXC
Compact share a Common termination
(see Figure 3).
For specific wiring diagrams, see the APOGEE
Wiring Guidelines for Field Panels and
Equipment Controllers (125-3002).
The installation is now complete.
37 38 39 4025 26 27 28 29 30 31 32 33 34 35 36
24V 24VUI1 UI2 UI3 U4 U5 U6 U7 U8
PXC0009R1
Point 1 (UI) +
-
Point 2 (UI) +
Point 3 (UI) +
-
Point 4 (U) +
Point 5 (U) +
-
Point 6 (U) +
Point 7 (U) +
-
Point 8 (U) +
+
-
+
-
External Sensor Power
Supplies 24Vdc, up to 100mA
Figure 3. Polarity for Point Connections.
NOTE: The combined total of the external sensor
power outputs cannot exceed 100 mA.