Document No. 129-477
Installation Instructions
November 15, 2017
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. APOGEE is a registered trademark or Siemens Industry, Inc. Other product or company names mentioned herein
may be the trademarks of their respective owners. © 2015 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
USA
+ 1 847-215-1000
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Document No. 129-477
Printed in the USA
Page 4 of 4
CAUTION:
To prevent equipment damage, do the
following:
If the room unit is powered by AC
:
•
AC Supply must be type NEC Class 2
and earth grounded at the secondary
neutral.
•
Room unit ACN (GND) must be
connected to the controller common.
•
If the controller has a floating common,
that common must be connected to the
same earth ground point as the
controller AC supply.
If the room unit is powered by isolated DC:
•
Where power is current limited up to
300 mA, it is not required to earth
ground the controller isolated common.
•
Room unit DC-(GND) must be
connected to the controller common.
CAUTION:
Follow manufacturer’s Installation
Instructions and Wiring Guidelines for
connecting the controller to the room unit.
For Siemens Controllers:
•
APOGEE Controllers with common
already earth grounded are TXIO
used on PXC Modular, PXC Compact
36 Expansion and P1 BIM or PTM
used on MBC and RBC. These do not
require the earth ground wire to be
connected to the controller.
•
APOGEE Controllers with floating
common are PXC Compact 16/24/36,
MEC, PXM, LON TEC and PPM.
These require the earth ground wire
to be connected to the controller.
Figure 6. Typical Wiring Base.
(All terminals may not be present.)
NOTE:
If active temperature (0 to 5V/0 to 10V/4 to
20 mA) (Pin 3) rather than passive/resistive
temperature is used, Passive Temp Common
(Pin 6) does not need to be terminated.
The installation is now complete.
Pin No.
Function
Sensing Only, Not Selectable
2
GND
3
TEMP
Sensing Only, Selectable
1
DC+ or ACH
2
DC- or ACN (GND)
3
Temp Output
5*
Passive Temp
6*
Passive Temp Common
Display, Selectable
1
DC+ or ACH
2
DC- or ACN (GND)
3
Temp Output
5*
Passive Temp
6*
Passive Temp Common
7
Setpoint Output
8
Override
9
Override Common
