Document No. 540-743
Installation Instructions
September 10, 2009
4. Pull the cable through the required mounting
hardware in the order shown.
MEC0045R1
49
50
51
52
AI21
AI22
AI23
AI24
41
42
43
44
45
46
47
48
+
-
+
-
+
-
+
-
AI17
AI18
AI19
AI20
33
34
35
36
37
38
39
40
+
-
+
-
+
-
+
-
DI5
DI6
DI7
DI8
9
10
11
12
13
14
15
16
DI1
DI2
DI3
DI4
1
2
3
4
5
6
7
8
SHIELD
53
54
55
56
24 VDC
SENSOR
SUPPLY
+
SIG 1
COM 1
DI
SIG 2
5 COM2*
4 RTD
3 COM 1
2 LCDPR*
1 OVRRD*
6 SETPT*
SENSOR
TERMINAL BLOCK
COM 2
24 VDC+
* Optional feature
NOTE: 1. Some terminal blocks have only four terminal points.
2. Not all wires are used with all sensor models.
3. COM2 is the return signal path for the setpoint option.
4. Wiring configuration is only an example and can differ
depending on application.
Figure 8. Electrical Box and Rough-in Mounting,
Typical.
Figure 7. MEC Wiring. (Wiring to Full-featured
Sensor 544-780).
5. Install the two sensor mounting screws provided
but do not tighten.
Electrical Box and Rough-in
Mounting, Typical
6. Mount the sensor base plate on the wall, noting
the "UP" arrow on the stabilizer plate:
a. Level the sensor base plate for appearance
only.
1. If a locator is attached to the rough-in device,
remove the locator by removing the two screws
and lightly rocking the locator to pull it free.
b. Tighten the two mounting screws to the
sensor base plate.
2. Untie the twist tie and pull about three inches
(75 mm) of the sensor cable into the space.
CAUTION:
Over-tightening may cause the sensor
base plate to crack or bend.
3. If you have a single-sensor electrical box, install
the electrical box adapter plate. See Figure 8.
If you have a double-sensor electrical box,
install the required mounting plate(s).
If you use a universal adapter kit for a retrofit
job, install the multi-slotted plate in place of the
electrical box adapter plate. See Figure 8.
7. Continue
with
Drywall Mounting (No Rough-in,
Typical),
Steps 7 through 13.
The installation is now complete.
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. Product or company names mentioned herein may be the trademarks of their respective
owners.
© 2009 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
Industry Sector
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
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Document No. 540-743
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