Document No. 586-797
Installation Instructions
August 25, 2005
Instructions
I innstall g the Backplane
Before securing, ensure no wires are caught
or pinched behind the backplane.
Insert the MBC-24 or MBC-40 backplane conne
through the rectangular cutout on the right side of
backplane.
WARNING:
1. ctor
the
Snap in place, as shown in (Error!
t found.1). (RBC alreadyReference source no
installed.)
Figure 1. MBC-24 Backplane connector.
2. Using ¼ in. (6.35mm) hardware provided by the
cabinet manufacturer mount the backplanes:
•MBC-24, 7-1/2 x 16-15/16 in (190mm x 430mm)
MBC-40, 7-1/2 x 26-15/1•6 in (190mm x 684mm)
ree•RBC, 7-1/2 x 11-3/4 in (190mm x 298mm) th
places bottom centered
Installing the Line Voltage Varistors
ure 2. Line Voltage Varistor AssFig embly
t
3. Attach ¼ quick connect (13) on white wire (8) to
transformer and (9) to Neutral with the wire nut.
1. Place insulator under terminal strip (3) and secure to
cabinet with sheet metal screws.
2. Attach ring (12) on green/yellow wire (7) to cabine
approved building earth ground point.
4. Attach ¼ quick connect (13) on black wire (10) to
transformer and (11) to Line voltage not greater than
240VAC typical with the wire nut.
Installing the Low Voltage Cable
1. Provide a 1-1/8 (28.5mm) x 9/16 in. (13.5mm) cutout
for the circuit breaker or remove tape backing and
apply to clean, dry surface.
2. Secure terminal to cabinet with sheet metal screws.
3. Using Phillips screw with washer secure the ring
terminals on the neutral wires to the backplane.
CAUTION:
Where multiple backplanes are
powered by one transformer
ensure H N polarity is observed.
4. Screw 24VAC Hot and Neutral wires into terminal.
5. Plug the low voltage power cable into backplane.
H N
Figure 3. Low Voltage Power Cable Assembly.
Completing the Installation
1. Apply Shutdown label adjacent to circuit breaker.
DANGER: The circuit breaker may not
disconnect all high voltage I/O
modules.
Incorporate a readily accessible
disconnect device for high
voltage I/O modules into the
wiring outside the backplane.
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. © 2005 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. 586-797
Printed in the U.S.A.
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