Siemens 941 User manual

Installation Instructions
Document No. 546-00085
December 8, 2011
CE Compliant Fume Hood Controller —
Application 941 and 942
Item No. 546-00085. Rev. CA Page 1 of 7
Figure 1. CE Compliant Fume Hood
Controller(Standard enclosure).
Figure 2. CE Compliant Fume Hood Controller
(Otherenclosure).
Control Applications
941 and 942
Product Description
The Fume Hood Controller Board (Figure 1 and
Figure 2) is the main termination board for the Fume
Hood Controller. The board comes with a ferrite filter
to suppress electrical emissions from the 8-
conductor cable. The ferrite filter must be installed to
meet FCC requirements and CE compliance
Product Numbers
546-00705 CE Compliant Fume Hood Controller
— Application 941 and 942 with cover
and mounting rail
546-00705E
CE Compliant Fume Hood Controller
— Application 941 and 942 with FHC
enclosure
NOTE:
Keep the controller board in its static
proof bag until you are ready to install.
Warning/Caution Notation
WARNING
Personal injury/loss of life may
occur if you do not follow the
procedures as specified.
CAUTION
Equipment damage or loss of data
may occur if you do not follow the
procedures as specified.
Expected Installation Times
23 minutes.
Required Tools and Materials
•Smallflat-blade screwdriver
Prerequisites
•Fume Hood Controller Enclosure is mounted
and wiring has been roughed-in.
•Operator Display Panel is installed and
cable pulled to location of controller.

Document No. 546-00085
Installation Instructions
December 8, 2011
Page 2 of 7Siemens Industry, Inc.
Instructions
1. If the Fume Hood Controller will be used with a
field panel, then disconnect the Field Level
Network (FLN) trunk from the field panel.
2. Place the ESD wrist strap on your wrist and
attach it to a good earth ground.
3. Carefully remove the controller board from the
anti-static bag.
4. To mount the controller, do one of the following:
•Center the controller board over the
mounting posts in the bottom of the
controller enclosure (Figure 1). Insert the
corner holes of the board onto the mounting
posts. Press firmly on the board to snap it
securely into place. Repeat for all
controllers.
•Secure the mounting rail inside the
enclosure at the controller’s desired
location and snap it into place on the
mounting rail (Figure 2). Repeat for all
controllers.
5. After installing all controller boards, verify that
power is OFF. Connect a certified 24 Vac Class
II power source to the Fume Hood Controller,
see Figure 3.
NOTE:
To meet CE requirements, the
enclosuremust be grounded.
Figure 3. Power Trunk Wiring.
6. Connect the FLN trunk wiring as shown in
Figure 4.
7. After all controllers are connected to the FLN
reconnect the FLN trunk to the field panel.
CAUTION
Do not connect an earth ground
to the FLN trunk shield terminal.
The earth ground should be
connected only at the field panel
to prevent ground loop currents.
Figure 4. FLN Trunk Wiring.
8. Connect the point wiring for the appropriate
Fume Hood Controller application as shown in
Figure 7 and Figure 8. The wiring for sashes is
shown in Figure 9 through Figure 14. Red/Signal
and Black/Common polarity must be maintained
on all sash sensors. Terminate both connections
of a 24 Vac load directly to the controller board.
The 24 Vac “H” terminal is switched through a
triac to the NO terminations when the associated
DO is energized.
CAUTION
The Fume Hood Controller DOs
control 24 Vac loads only. The
maximum rating is 12 VA for
each DO. For higher ratings an
interposing relay must be used.
9. Follow the instructions in Figure 5.
CAUTION
Ferrite filter(s) must be installed
on the Operator Display Panel
(ODP) cable. If not, the controller
is not FCC and CE compliant.

Document No. 546-00085
Installation Instructions
December 8, 2011
Siemens Industry, Inc. Page 3 of 7
Figure 5. Installing a Ferrite Filter.
10. Plug the Operator Display Panel cable into the
Operator Display Panel Communication port on
the controller board (Figure 6 and Figure 7).
NOTE:
The ferrite filter must be installed on the
cable inside the enclosure to meet FCC
and CE requirements (Figure 6).
Figure 6. Ferrite Filter Installed.
The installation is complete.

Document No. 546-00085
Installation Instructions
December 8, 2011
Page 4 of 7 Siemens Industry, Inc.
Figure 7. Fume Hood Controller with Damper Wiring (Application 941).

Document No. 546-00085
Installation Instructions
December 8, 2011
Siemens Industry, Inc. Page 5 of 7
Figure 8. Fume Hood Controller with Venturi Air Valve Wiring (Application 942).

Document No. 546-00085
Installation Instructions
December 8, 2011
Page 6 of 7Siemens Industry, Inc.
NOTE:
The wiring shown is based on wiring
sashes from the left side. When wiring
sashes from the right, the wiring is
reversed. The sash closest to the
connector is wired to Red and Black.
The sash farthest from the connector is
wired to White and Black.
Figure 9. Single Vertical Sash Configuration.
Figure 10.Two Horizontal Sash Configuration.
Figure 11.Four Horizontal Sash Configuration.
Figure 12.Two Horizontal/One Vertical Sash
Configuration.
Figure 13. Four Horizontal/One Vertical Sash
Configuration.

Document No. 546-00085
Installation Instructions
December 8, 2011
Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as
design improvements are introduced. APOGEE and Insight are registered trademarks of Siemens Industry, Inc. Other product or company
names mentioned herein may be the trademarks of their respective owners. © 2011 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A
Your feedback is important to us. If you have
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Document No.546-00085
Printed in the USA
Page 7 of 7
Figure 14. 2 Verticals and up to 8 Horizontals, Walk-in Sash Configuration Wiring Diagram.