Siemens 125-5033 User manual

Two-State Constant Volume
Fume Hood Controller
Owner’s Manual
125-5033 Rev. AA, September 2007

Rev. AA, September 2007
NOTICE
The information contained within this document is subject to change without notice and should not be
construed as a commitment by Siemens Building Technologies, Inc. Siemens Building Technologies, Inc.
assumes no responsibility for any errors that may appear in this document.
All software described in this document is furnished under a license and may be used or copied only in
accordance with the terms of such license.
WARNING
This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in
accordance with the instructions manual, may cause interference to radio communications. It has been
tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against such interference when operated in a
commercial environment. Operation of this equipment in a residential area is likely to cause interference in
which case users at their own expense will be required to take whatever measures may be required to
correct the interference.
SERVICE STATEMENT
Control devices are combined to make a system. Each control device is mechanical in nature and all
mechanical components must be regularly serviced to optimize their operation. All Siemens Building
Technologies branch offices and authorized distributors offer Technical Support Programs that will ensure
your continuous, trouble-free system performance.
For further information, contact your nearest Siemens Building Technologies, Inc. representative.
Copyright 2007 by Siemens Building Technologies, Inc.
TO THE READER
Your feedback is important to us. If you have comments about this manual, please submit them to
[email protected]
CREDITS
APOGEE is a registered trademark of Siemens Building Technologies, Inc.
Insight for Minicomputers is a registered trademark of Siemens Building Technologies, Inc.
Insight for Personal Computers is a registered trademark of Siemens Building Technologies, Inc.
UniTrak
™
is a trademark of Siemens Building Technologies, Inc.
Teflon is a registered trademark of DuPont.
Country of Origin: US

Siemens Building Techologies, Inc. V
Table of Contents
How To Use This Manual.............................................................................................VII
Manual Organization.................................................................................................VII
Manual Conventions..................................................................................................VII
Manual Symbols........................................................................................................VIII
Datamate Software....................................................................................................VIII
Getting Help ..............................................................................................................VIII
Where To Send Comments.......................................................................................VIII
Product Overview.........................................................................................................1
Introduction...................................................................................................................1
Related Equipment....................................................................................................1
Electronic Actuation................................................................................................1
Pneumatic Actuation...............................................................................................1
Ordering Notes .......................................................................................................2
Hardware Inputs........................................................................................................3
Analog.....................................................................................................................3
Digital......................................................................................................................3
Hardware Outputs.....................................................................................................3
Analog.....................................................................................................................3
Digital......................................................................................................................3
Power Wiring.............................................................................................................3
Communication Wiring..............................................................................................3
Controller LED Indicators..........................................................................................4
Operator Display Panel (ODP)..................................................................................4
Laboratory Exhaust Air Terminal...............................................................................5
Venturi Air Valves......................................................................................................6
Electronic Actuator Assembly
...................................................................................................................................Err
or! Bookmark not defined.
Pneumatic Actuator...................................................................................................8
Analog Output-Pneumatic (AO-P) Module................................................................9
Differential Pressure Transmitter ..............................................................................10
Airflow Sensor...........................................................................................................10
Cables .......................................................................................................................10

VI Siemens Building Technologies, Inc.
Applications..................................................................................................................11
Fume Hood Controller: 2-Position Constant Volume...............................................11
Basic Operation............................................................................................................12
High and Low Exhaust Flow Control.........................................................................12
Control Loops .........................................................................................................12
Calibration .................................................................................................................12
DO3 Output Functionality..........................................................................................13
Warning and Alarm Features....................................................................................13
Warning Operation..................................................................................................13
Alarm Operation......................................................................................................13
Alarm Strategies.....................................................................................................14
Emergency Purge Feature........................................................................................14
Emergency Purge Operation..................................................................................14
Emergency Purge Strategies..................................................................................15
Fail-safe Operation....................................................................................................16
Fume Hood Controller ............................................................................................16
ODP........................................................................................................................16
Differential Pressure Transmitter............................................................................16
Electronic Actuator Assembly.................................................................................16
Pneumatic Actuator ................................................................................................16
AO-P Module..........................................................................................................16
Point Database..............................................................................................................17
Troubleshooting ...........................................................................................................20
Basic Service Information .........................................................................................20
Preventive Maintenance............................................................................................20
Safety Features.........................................................................................................21
Controller LEDs.........................................................................................................21
Glossary ........................................................................................................................22
Index ..............................................................................................................................26

Siemens Building Techologies, Inc. VII
How To Use This Manual
This section covers manual organization, conventions, and symbols used in the
manual, and other information that will help you understand and use a Laboratory
Room Controller — Electronic Output.
Manual Organization
This manual contains the following sections:
•Chapter 1 Product Overview describes the hardware components and the
accessories that are used with the controller.
•Chapter 2 Applications describes the control applications available in the
controller.
•Chapter 3 Point Database defines the point database descriptors and
includes address and applications.
•The Glossary describes terms and acronyms.
•The Index helps you find information.
Manual Conventions
The following table lists conventions used in this manual.
Convention Example
Actions that you should
perform are specified in
boldface font.
Type Ffor Field panels.
Click OK to save changes and close the dialog box.
Error and system
messages are displayed
in Courier New font.
The message Report Definition successfully renamed
appears in the status bar.
New terms appearing for
the first time are
italicized.
The Open Processor continuously executes a user-defined set of
instructions called the control program.

VIII Siemens Building Technologies, Inc.
Manual Symbols
The following table lists symbols that are used to draw your attention to important
information.
Notation Symbol Meaning
CAUTION: Indicates that equipment damage or loss of data may occur
if the user does not follow a procedure as specified.
WARNING: Indicates that personal injury or loss of life may occur to the
user if a procedure is not performed as specified.
Datamate Software
Datamate is a customer software tool for all controller communications. There are
two versions: Datamate Base, and Datamate Advanced.Datamate Base works on an
IBM-compatible Personal Computer (PC), or a Handheld PC or Pocket PC™ running
Windows CE. Datamate Advanced works only on an IBM-compatible Personal
Computer. With Datamate, you can backup, restore, and edit any APOGEE database
(but only Datamate Advanced allows you to edit points offline). Backing up and
restoring a database can be accomplished while connected to any APOGEE field
panel, or to the Building Level Network (BLN) or Floor Level Network (FLN) device in
question. A modem and telephone lines can also be used. Databases can be saved
to a hard or floppy disk and kept for permanent storage or used as backup.
For more information on Datamate software, refer to the appropriate user guide
based on which version of Datamate you are using (Base or Advanced), or contact
your local Siemens Building Technologies, Inc. representative.
Getting Help
If at any time you find that you need help with a Laboratory Room Controller issue
not covered in this manual, contact your local Siemens Building Technologies, Inc.
representative.
Where To Send Comments
Your feedback is important to us. If you have comments about this manual, please submit them
to [email protected]

Siemens Building Technologies, Inc. 1
1
Product Overview
Introduction
The Fume Hood Controller is an equipment controller designed to provide Direct Digital
Control (DDC) for 2 position fume hoods. The controller consists of a controller board and a
controller enclosure. The controller board (Figure 1) is the central computing/controlling
component of the system.
Related Equipment
•Operator Display Panel (ODP)
•Laboratory Exhaust Air Terminal
•Venturi Air Valve
•Differential Pressure Transmitter (See NOTE)
•Airflow Sensor (See NOTE)
•Cables
Electronic Actuation
•Electronic Actuator Assembly (See NOTE)
Pneumatic Actuation
•Analog Output-Pneumatic (AO-P) Module (See NOTE)
•Pneumatic Actuator (See NOTE)
NOTE: These components may be included in the Laboratory Exhaust Terminal or
Venturi Air Valve.

Fume Hood Controller Owner's Manual
2 Siemens Building Technologies, Inc.
Table 1. Fume Hood Controller – Electronic Output Applications.
Application Description
940 2 Position Fume Hood Controller
Ordering Notes
Fume Hood Controller – Electronic Output (940) 546-00750
Figure 1. Fume Hood Controller Board .

Product Overview
Siemens Building Technologies, Inc. 3
Hardware Inputs
Analog
•Differential pressure transmitter
Digital
•Operator Display Panel (ODP)
•ATTN.UNATTN (through DI1)
•OCC.UNOCC (through DI1)
Hardware Outputs
Analog
•AO-E/AO-P module (Floating Control)
•Operator Display Panel (ODP)
•AO2 (Flow Signal, 1 to 10 Vdc)
Digital
•FLN communications trunk
•DO3 (24 Vac, Alarm/Hi.Low Output)
Power Wiring
The controller is powered by 24 Vac. Power wiring connects to the three screw terminals on
the controller labeled “C” (Common), “H” (Hot) and “E” (Ground) on the terminal block labeled
“TB1”. Earth ground connection is required (Figure 2).
Communication Wiring
The controller connects to the field panel by means of a Field Level Network (FLN) trunk.
Communication wiring connects to the three screw terminals on the controller labeled “+”
(positive), “-“ (negative), and “S” (Shield) (Figure 3).

Fume Hood Controller Owner's Manual
4 Siemens Building Technologies, Inc.
24V COMMON
24V HOT
GROUND
LAB00140R1
FLN TRUNK
+-
S
(SHIELD) (SHIELD)
(+)
(+)(-) (-)
TEC0470R1
Figure 2. Power Wiring. Figure 3. Communication Wiring.
Controller LED Indicators
The controller has six Light Emitting Diode (LED) indicators. See Table 2.
Table 2. Controller LEDs.
LED Type Label
(if present)* Indication
DO LED 1 - LED 3 Indicates the ON/OFF status of the DO associated with it. A
glowing LED indicates that the DO is energized.
Transmit TX Indicates, when flashing, that the controller is transmitting
information to the field panel.
Receive RX Indicates, when flashing, that the controller is receiving
information from the field panel.
BST
”Basic Sanity Test” BST Indicates, when flashing ON and OFF once per second, that the controller is functioning properly.
Operator Display Panel (ODP)
The Operator Display Panel (ODP) is the interface device between the Fume Hood Controller
and the operator. Its main functions are to display normal, warning, and alarm conditions to
the operator. The ODP consists of a housing, three Light Emitting Diodes (LEDs), a liquid
crystal display (LCD), four buttons, and a portable operator's terminal port. See Figure 4. The
ODP buttons function as follows:
Horn Silence button – Pressing the Horn Silence button turns the audible alarm off for the
current alarm event.
Emergency Purge button – Pressing the Emergency Purge button removes contaminated
air from the fume hood by switching to an emergency exhaust flow level. The internal audible
alarm will sound. Emergency Purge automatically overrides any other control mode in the
Fume Hood Controller.

Product Overview
Siemens Building Technologies, Inc. 5
Pressing the Emergency Purge button a second time reverts the Fume Hood Controller to
normal operation for the current conditions.
HI/LO: HI/OFF Select button – Pressing this button changes the controller from a high flow
setpoint to a low flow setpoint and back again or changes the controller from a high flow
setpoint to and OFF state and back again.
Auxiliary Button – The Auxiliary buttons are not used currently.
For more information on the ODP, see the Fume Hood Controller Operator Display Panel
User's Card (125-1976).
Figure 4. Operator Display Panel.
Laboratory Exhaust Air Terminal
The Laboratory Exhaust Air Terminal is a pre-packaged, easy to install, airflow measurement
and control station. See Figure 5. It combines an orifice plate flow sensor, differential
pressure transmitter, an electronic actuator assembly, or No. 3 pneumatic actuator, and
Analog Output-Pneumatic (AO-P) Module, and butterfly damper in a 20 gauge 316 stainless
steel duct section.
This arrangement provides fast acting, stable, and precise VAV fume hood exhaust airflow
control.

Fume Hood Controller Owner's Manual
6 Siemens Building Technologies, Inc.
The terminal is available in diameters ranging from 4 to 18 inches. The terminal is available in
a variety of end configurations to match the ductwork construction. It is also available in
TEFLON®coated 18-gauge steel for highly corrosive environments.
Figure 5. Laboratory Exhaust Air Terminal.
Venturi Air Valves
The Venturi Air Valve is a pre-packaged, easy to install airflow measurement and control
station. See Figure 6. This assembly combines the orifice plate flow sensor, differential
pressure transmitter, Electronic actuator and a Venturi Air Valve.
This arrangement provides fast acting, stable, and precise exhaust airflow control.
FUM0400R1
Figure 6. Single-Body Venturi Air Valve.

Product Overview
Siemens Building Technologies, Inc. 7
High Speed Electronic Actuation
The High speed electronic actuator assembly consists of two parts, the electronic actuator
and the interface board. The actuator is connected to the exhaust flow control device in the
fume hood exhaust duct. The electronic actuator assembly is used because of its small size
and quick response time.
CAUTION:
Due to the design parameters and the response time required by the Fume Hood
Controller, the assembly must be replaced with the same part or a Siemens
Building Technologies, Inc. approved equivalent. Any modifications that are not
approved may affect the safety and performance of the Fume Hood Controller.
1 1 1
11.75
14.5
AO - E
MODULE
FUM0319R3
ACTUATOR
3.5
4.5
Figure 7. Electronic Actuator Assembly in an Exhaust Air Terminal Enclosure.

Fume Hood Controller Owner's Manual
8 Siemens Building Technologies, Inc.
Low Speed Electronic Actuation
Alternately, when speed of response is not an issue, slower speed electronic actuation may
be used. This can be used when the change-of-state between High and Low can take place
in 15 seconds or more.
Low Speed Actuator (GMA13x).
Pneumatic Actuation
The pneumatic actuator is connected to an exhaust flow control device in the fume hood
exhaust duct. The standard pneumatic actuator (Figure 8) used with the Fume Hood
Controller is the No. 3 unit. The No. 3 actuator is used because of its small size and quick
response time. The actuator has a deep drawn aluminum housing, a rubber diaphragm, and
a spring return rated at 8 to 13 psi. Pneumatic actuation requires two components, the
actuator and the transducer (AO-P module).
WARNING:
Due to the design, parameters and the response times required by the
Fume Hood Controller, the No. 3 actuator always must be replaced
with the same part or a Siemens Building Technologies, Inc. approved
equivalent. Any modifications that are not approved may affect the
safety and performance of the Fume Hood Controller.

Product Overview
Siemens Building Technologies, Inc. 9
Figure 8. Pneumatic Actuator.
Analog Output-Pneumatic (AO-P) Module
The Analog Output-Pneumatic (AO-P) Module is an electric-to-pneumatic interface between
the Fume Hood Controller and the pneumatic actuator. The AO-P Module translates electrical
signals from the Fume Hood Controller into pneumatic signals that command the actuator.
The AO-P Module consists of two industrial grade solenoids that supply or bleed air to the
actuator by using a pulse modulation technique. See Figure 9. Minimum air supply to the AO-
P Module is 18 psi and the maximum is 30 psi. The valves are rated for 24 Vac.
5.00" (127.0mm)
3.70"
(94.0mm)
SUPPLY
COMMON EXHAUST
SUPPLY
S
(SUPPLY)
18-30 PSI
R
(ACTUATOR)
EXHAUST
FUM0240R1
Figure 9. AO-P Module.

Fume Hood Controller Owner's Manual
10 Siemens Building Technologies, Inc.
NOTE: While the pneumatic actuator is being commanded, you may hear a hissing or
clicking sound coming from the AO-P module. This is due to the movement of the
air valves and the bleeding of air from the actuator. This is normal operation.
Differential Pressure Transmitter
The differential pressure transmitter is used to send a signal that represents the velocity of air
in the duct to the controller. The differential pressure transmitter receives the velocity
pressure signal from the airflow sensor (orifice plate). The transmitter is a dead-end device
which prevents the exhausted fume hood air from flowing through the transmitter or the
sensor.
NOTE: In accordance with laboratory ventilation safety standards and regulatory
agencies, the performance of the fume hood should be checked annually, as a
minimum, to ensure continued safe and proper operation. Consult Siemens
Building Technologies for more information about a comprehensive laboratory
ventilation system evaluation and associated test programs.
Airflow Sensor
Airflow sensors are used in conjunction with the differential pressure transmitter. The airflow
sensor senses an average air velocity across the duct section. Using the average air velocity
and the duct area, the controller calculates the airflow.
CAUTION:
Ensure that the sensor and exhaust system materials match the fume hood usage.
Exhausting corrosive fumes may corrode the sensor and exhaust system.
Cables
The Fume Hood Controller connects to the portable operator's terminal with the controller
interface cable (P/N 540-143). This cable has an RJ-11 connector (similar to a phone jack)
on one end, and a larger, 9-pin connector on the other end. The RJ-11 connector plugs into
the bottom of the ODP. For more information, see the Fume Hood Controller Operator
Display Panel User's Card (125-1976). The 9-pin connector plugs in the communication port
of the portable operator's terminal. For more cable information, contact your local Siemens
Building Technologies, Inc. representative.

Siemens Building Technologies, Inc. 11
2
Applications
Fume Hood Controller: 2-Position Constant Volume
Application 940 is designed for use with a constant volume or two-position fume hood in a
manifold fume hood exhaust system. In this application, two position fume hoods have an
individual exhaust damper or venturi air valve connected to a central fan. The application
modulates the exhaust flow control device to maintain a high or low flow setpoint based on
inputs from the ODP (Operators Display Panel), Digital Input, an exhaust airflow sensor, and
the controller setpoints (Figure 10).
Figure 10. Application 940 Control Drawing shown using a damper.

Fume Hood Controller Owner's Manual
12 Siemens Building Technologies, Inc.
Basic Operation
The Fume Hood Controller provides Direct Digital Control (DDC) technology for controlling
fume hood face velocities in a manifolded fume hood exhaust system.
High and Low Exhaust Flow Control
The Fume Hood Controller can operate at two different setpoints, described as HI flow and
LOW flow setpoints. The low setpoint can be set to zero to send the controller into an OFF
mode. The OFF mode shuts off the flow alarms and closes the exhaust flow control device
and allows the controller to go into a standby mode of operation.
The Operators Display Panel (ODP) can display HI/LOW setpoint or output exhaust flow in
CFM. Due to display limits, the actual number displayed is CFM divided by 10.
Control Loops
The PID loop controls the exhaust flow control device based on the values of the exhaust
flow and the flow setpoint. The loop output controls the supply and exhaust through a time
modulation scheme. The control loopout ranges from -100 to 100%.
•-100% is the maximum supply that closes the exhaust flow control device at full
speed.
•0% holds the exhaust flow control device at its current position.
•100% is the maximum exhaust that opens the exhaust flow control device at full
speed.
Electronic
The controller sends a separate signal to each of the two inputs that reside on the AO-E
module. For values of 100% to 0%, the controller sends a decreasing percentage of the full
signal length to the retract input. For values of 0% to -100%, the controller sends an
increasing percentage of the full signal to the extend input.
Pneumatic
The controller sends a separate signal to each of the two solenoids that reside on the AO–P
module. For values of 100% to 0%, the controller sends a decreasing percentage of the full
signal length to the exhaust solenoid. For values of 0% to -100%, the controller sends an
increasing percentage of the full signal length to the supply solenoid.
Calibration
Air Velocity Sensor - Calibration of the controller's air velocity sensor is periodically required
to maintain accurate air velocity readings.