Siemens RWD62U Owner's manual

RWD62U
Technical Instructions
Document No. 155-737
January 14, 2005
Universal Controller
Description The Universal controller is intended for heating, air conditioning, ventilation and
refrigeration in comfort control applications. RWD62U main loop control applications
are designed for temperature, static pressure, humidity, air pressure, fluid pressure,
refrigeration, air quality and air fluid velocity control. The controller contains pre-
programmed applications.
Auxiliary control functions include:
• Day/night setpoints
• Remote setpoint control
• Limiter control
• Cascade control
• Maximum priority
• Setpoint compensation
• Summer/winter operation
Control parameters are adjusted for maximum comfort control via three buttons on the
face of the device, or with a laptop computer and Siemens Building Technologies
program software.
NOTE: For complete supporting technical documentation, including training
presentations, see www.us.sbt.siemens.com/hvp/components.
Features • Stand-alone electronic temperature controller with P or P+I response
• 24 Vac operating voltage
• Control application selectable via Application Number
• Active input scale can be selectable
• Limit and direction of the output scale can be freely assigned
• Two universal inputs for Siemens 1000 ohm nickel (Ni 1000), 1000 ohm platinum
(Pt 1000) temperature sensors and 0 Vdc to 10 Vdc signals
• Unit can be set as °F, °C, % or no specified unit
• Two modulating 0 to 10 Vdc signal outputs, direct or reverse action
• One digital input for day/night changeover
• Entering or changing of all data via operating buttons on the controller, possible
without additional tools
• Computer connection for downloading canned applications via the software tool
Product Number RWD62U
Siemens Building Technologies, Inc.

Technical Instructions RWD62U Universal Controller
Document Number 155-737
January 14, 2005
Warning/Caution Notations
CAUTION:
Equipment damage may occur if you do not follow a
procedure as specified.
Specifications
Power Supply
Operating voltage 24 Vac + 20%
Frequency 50/60 Hz
Power consumption 2.5 VA
LCD Actual and nominal values Four digits
Setpoint adjustment range -58°F to 302°F (-50°C to 150°C)
Display Resolution
(does not relate to controller
accuracy)
Siemens Ni 1000 ohm 1°F (0.5°C)
Pt 1000 ohm 1°F (0.5°C)
Active sensor Depends on setting range
Environmental Conditions Storage and transport
Temperature -13°F to 158°F (-25°C to 70°C)
Humidity <95% rh
Operation
Temperature 32°F to 122°F (0°C to 50°C)
Humidity <95% rh
Regulatory Approvals Conforms to requirements
UL UL listed to 916 Energy Management
Equipment
Terminals Screw terminals, min./max. conductors Minimum: 24 AWG (1)
Maximum: 16 AWG (2), or
14 AWG (1)
Weight RWD62U Controller 10.4 oz (295 grams)
With packaging 12.24 oz (347 grams)
Analog Inputs X1, X2
Siemens Ni 1000 ohm @ 32°F
(0°C)
Controller measuring range -58°F to 302°F (50°C to 150°C)
Maximum cable length for 14 AWG Maximum 984 ft (300 m)
Pt 1000 ohm at 32°F (0°C) Controller measuring range -4°F to 356°F (-20°C to 180°C)
Maximum cable length for 14 AWG Maximum 984 ft (300 m)
Analog voltages
(For measured variable in °F,
°C, % or without unit)
Range 0 to 10 Vdc corresponding to
adjustable range from –100 to
8000 (°C, °F, % or no unit)
Maximum cable length for 14 AWG Maximum 984 ft (300 m)
Remote setpoint X2 Range 0 to 1000 ohm corresponding to
adjustable range from –100 to
8000 (°C, °F, % or no unit)
Maximum cable length for 14 AWG Maximum 984 ft (300 m)
Digital input D1 Polling voltage for control commands (D…M) 15 Vdc
Current consumption <15 mA
Analog outputs Y1, Y2 Range 0 to 10 Vdc
Maximum current +1 mA
Accessories ARG62.21 Protective enclosure for wall mounting.
SEH62.1U Program Clock
SEM62.2U 24/120 Vac Transformer
125-3481 RWD Controller Programming Tool (CD)
RWDTKU Tool Kit
Page 2 Siemens Building Technologies, Inc.

RWD62U Universal Controller Technical Instructions
Document Number 155-737
January 14, 2005
Function Summary • Controller
Stand-alone controller with two 0 to 10 Vdc outputs with independent adjustment
on each sequence for direct acting and/or reverse acting. Adjustable parameters,
including proportional band and integral action time.
• Auxiliary selectable function
• Universal input X2 for one of the following auxiliary functions:
− P+I limiter function (Absolute and Relative)
− Remote setpoint
− Cascade control
− Setpoint compensation
− Winter/summer operation
− Maximum priority
• Digital input D1 for setpoint changeover day/night
Equipment
Combinations
The following Siemens devices can be connected to RWD62U Universal Controllers.
Other combinations with units from third-party manufacturers are possible, if the
input and output specifications match the RWD62U.
Table 1.
Description Document Number
Sensor with Siemens Ni 1000 temperature sensing element
QAA25U Room temperature sensor with setpoint adjuster
155-330
GIB Series 310 lb-in Non Spring Return Actuators
GBB Series 177 lb-in Non Spring Return Actuators
155-176P25
155-177P25
GEB Series 132 in-lb Non Spring Return Actuators 155-318P25
GCA Series 142 in-lb Spring Return Actuators 155-173P25
155-174P25
155-175P25
GMA Series 62 in-lb Spring Return Actuators 155-315P25
SKD Valve Actuator with proportional input 155-180P25
SKB/SKC Valve Actuator with proportional input 155-163P25
SQX Valve Actuator with proportional input 155-182P25
SQS Valve Actuator with proportional input 155-190P25
SSC Valve Actuator with proportional input 155-313P25
SSB Valve Actuator with proportional input 155-192P25
Electric Rack and Pinion proportional actuator 155-541P25
1/2 to 2-inch two-way globe valves 155-184P25
1/2 to 2-inch three-way globe valves 155-185P25
2-1/2 to 6-inch two-way flange valves 155-159P25
2-1/2 to 6-inch three-way flange valves 155-160P25
MT Series 1/2 to 1-1/2-inch two-way globe valves 155-196P25
MT Series 1/2 to 1-1/2-inch three-way globe valves 155-197P25
MZ Series 1/2 to 1-inch two-way globe valves 155-198P25
MZ Series 1/2 to I-inch three-way ball valves 155-199P25
Differential Pressure Sensor 155-719
Siemens Building Technologies, Inc. Page 3

Technical Instructions RWD62U Universal Controller
Document Number 155-737
January 14, 2005
Software Tool An optional, user-friendly, Windows® 95 (or later) based software tool for controller
application selection and parameter adjustment is available. It provides you with a
printout of the controller settings. This tool allows controller programming prior to
installation.
Functions
Controller Type
The RWD62U is a stand-alone universal controller, which performs both primary and
auxiliary control functions. The respective mode is defined by entering the
corresponding configuration and setting parameters via the push buttons on the
controller or the software tool.
Main Functions The RWD62U controller can be programmed as follows:
• One sequence: Y1 or Y2 Reverse or direct acting
• Two sequences: Y1 and Y2 Reverse and direct acting or
Y1 and Y2 Reverse and reverse acting or
Y1 and Y2 Direct and direct acting
NOTE: Direct Acting – As air temperature increases, the control output increases.
Reverse Acting – As air temperature increases, the control output
decreases.
TH0599R3
= TEMPERATURE SENSOR
= AIR DAMPER ACTUATOR
= HEATING COIL
= COOLING COIL
= HEATING OR COOLING COIL (TWO-PIPE)
= FAN OR PUMP
= TIME CLOCK
= REMOTE SET POINT UNIT
= OUTSIDE AIR SENSOR
+
+
-
-
Figure 1. Frequently Used Symbols in Application Drawings.
TH0786R1
Y1
Output
Voltage
Setpoint
Setpoint
Temp.
Figure 2. One Sequence Heat, Direct
Acting or Reverse Acting
(Application 10 to 19).
Y1
Output
Voltage
Temp.
Y2
Setpoint
TH0787R1
Figure 3. Two Sequence Heat, Two Direct
Acting or Two Reverse Acting Sequences
(Application 20 to 29).
Y1
Setpoint Temp
Y2
Output
Voltage
TH0788R1
Setpoint
Figure 4. One Direct Acting Heat and One
Direct Acting Cool or One Reverse Acting
Heat and One Direct Acting Cool
Sequence
(Application 30 to 39).
TH0789R1
Y1
Temp.
Output
Voltage
Setpoint
Setpoint
Figure 5. One Direct Acting Cool or One
Reverse Acting Cool Sequence
(Application 40 to 49).
Page 4 Siemens Building Technologies, Inc.

RWD62U Universal Controller Technical Instructions
Document Number 155-737
January 14, 2005
Output
Voltage
Y2
Setpoint Temp.
Y1
TH0790R1
Figure 6. Two Direct Acting Cool or Two Reverse Acting Cool Sequences
(Application 50 to 59).
Universal Input X1 The primary input for a Siemens Ni 1000 temperature sensor, a Pt 1000 temperature
sensor, or a 0 to 10 Vdc active input.
Universal Input X2 The secondary input for a Siemens Ni 1000 temperature sensor, a Pt 1000
temperature sensor, an active/passive remote setpoint transmitter, or a 0 to 10 Vdc
active input.
Digital Input D1 Selects the day/night changeover. Changeover occurs via potential-free dry contacts
between D1 and M. Typically, a time clock controls D1 input.
Analog Outputs Each output (Y1, Y2) can be configured for either reverse or direct acting. The
modulating voltage output (Y…) controls the devices requiring a 0 to 10 Vdc signal.
Example
X1
Y2Y1
Temp.
Y
TH0791R1
Figure 7. Constant Volume with Temperature
Control, Direct Acting/Reverse Acting.
X1 Room temperature
Y1 Heating, direct action
Y2 Cooling, reverse action
X1
Y2Y1
Temp.
Y
TH0811R1
Figure 8. Constant Volume with Temperature
Control, Reverse Acting/Direct Acting.
X1 Room temperature
Y1 Heating, reverse action
Y2 Cooling, direct action
Auxiliary Functions One of the following auxiliary functions can be selected:
• P+I limiter (Absolute, #x2 and Relative, #x3)
• Remote setpoint, #x1
• Cascade control, #x5
• Setpoint compensation, #x4
• Winter/summer operation, Digital #x6, Analog #x7
• Maximum priority, #x8
• Main loop 0 to 10V input, #x9
Day and night operation mode is also available.
Siemens Building Technologies, Inc. Page 5

Technical Instructions RWD62U Universal Controller
Document Number 155-737
January 14, 2005
P+I Limiter Function
NOTE: In the following
illustrations, the
heating and cooling
outputs are D.A.
Outputs can be
reversed.
TH0794R1
X1
Y2Y1
Temp.
Y
X2
Figure 9. P+I Limiter Function.
The limiter function with P+I control
enables absolute (or relative) maximum
or minimum limitation of the supply air
temperature (X2).
When the value drops below or exceeds
the limiter setpoint, the limiter function
controls and takes priority over the main
setpoint.
Remote Setpoint
NOTE: You cannot select
the remote setpoint
auxiliary function in
Night mode.
X1
Y2Y1
Temp.
Y
X2
TH0793R1
Figure 10. Remote Setpoint.
A remote setpoint transmitter (QAA25U),
connected to X2 and configured
accordingly, enables setpoint
adjustment.
Active measurement from 0 to 10 Vdc
corresponding adjustable range from
–100 to 8000 units
Passive measurement from 0 to 1000 Ω
corresponding adjustable range from
–100 to 8000 units
Cascade Control
TH0794R1
X1
Y2Y1
Temp.
Y
X2
Figure 11. X2 Supply Air Temperature
Sensor.
You can select the P+I/P+I room/supply
air temperature cascade control. In this
case, the virtual P+I room temperature
controller determines the setpoint within
the limiter setpoints for the P+I supply air
temperature controller.
Maximum Priority
NOTE: You cannot select
the maximum priority
auxiliary function in
Night mode.
TH0795R1
X2
Y2Y1
Temp.
Y
X1
Figure 12. Maximum Priority,
Cooling.
If the value (0 to 10V) of the input X2 is
greater than the calculated output of the
cooling sequence, the output will use the
X2 input value as output value. This is
active even when the controller is
working with the heating sequence.
Setpoint Compensation
TH0796R1
X2
Y1
Temp.
Y
X1
Figure 13. Setpoint Compensation.
The temperature setpoint X1 is shifted
by the temperature as measured at
sensor X2.
Configuration of the RWD62U defines
the influence on setpoint X1.
The example shows the room air
temperature setpoint as shifted by the
outside temperature.
Page 6 Siemens Building Technologies, Inc.

RWD62U Universal Controller Technical Instructions
Document Number 155-737
January 14, 2005
Winter/Summer Operation
TH0797R1
X1
Y2Y1
Temp.
Summer
Setpoint Winter Setpoint
Y
T
X2
Figure 14. Winter/Summer Operation.
A digital switch or analog input between
terminals X2 and M will implement
winter/summer changeover.
When adjusting setpoints, the heating
setpoint must be less than the cooling
setpoint.
Digital changeover
When the contact is closed, summer
operation is selected. Reverse acting
output (Y1 only) is set to direct action
(cooling).
Analog changeover
Summer operation is selected when the
X2 input exceeds the setpoint Reverse
acting output (Y1 only) is set to direct
action (cooling).
Day/Night Setpoint
TH0798R1
X1
Y2Y1
Temp.
Y
D1
Figure 15. Day/Night Setpoint.
A contact between terminals D1 and M
can be used to implement setpoint
changeover for day/night operation.
When the contact is open, the setpoints
for day operation are selected.
When the contact is closed, the setpoints
for night operation are selected.
During the night mode, the following
auxiliary functions are disabled: remote
setpoint, absolute/relative limiter,
setpoint compensation and maximum
priority.
Mechanical Design
Protective Housing
ARG62.21
• This UL-approved plastic housing protects the controller when mounted outside a
control panel, such as on ducts, walls and in mechanical rooms. This housing
also prevents inadvertent contact with voltage supplying parts such as the
connecting terminals.
• The RWD62U clips into the housing.
• The cable entries are located at the top and the bottom of the ARG62.21
housing.
• The front has an opening for the LCD display and the programming buttons.
Terminals Plug-in screw terminals
Siemens Building Technologies, Inc. Page 7

Technical Instructions RWD62U Universal Controller
Document Number 155-737
January 14, 2005
Operating and Display
Elements The RWD62U is operated by the buttons on the controller front. Additional tools are
not necessary. The controller can also be programmed via the software tool, which
plugs into the nine-pin port.
TH0799R1
LCD Display
Software Tool
Nine Pin Port
Program and Display
Function Buttons
Figure 16. RWD62U Universal Controller.
LCD The LCD shows the following information for normal operation:
• Current operating values (maximum four digits)
• Current setpoints (day/night)
• Application number
• Control sequencing diagram
• Auxiliary input value
• Selected auxiliary function
Operating Buttons The controller has three operating buttons for the following functions:
The SELECT ●button is used to enter or save the value adjustment.
The operating buttons are used for viewing and adjusting parameters.
Configuration To configure the controller, follow the instructions supplied with the controller.
Page 8 Siemens Building Technologies, Inc.

RWD62U Universal Controller Technical Instructions
Document Number 155-737
January 14, 2005
Installation Notes The RWD62U controller can be mounted as follows:
NOTE: Observe all local installation regulations and building codes.
A On a DIN rail at least 4.7 inches (120 mm) long
B Wall-mounted with two #6 screws
C Front-mounted using standard hardware:
• One DIN rail 5.9 inches (150 mm) long
• Two hexagonal blocks 1.97 inches (50 mm)
• Washers and screws
D In the ARG62.21 protective housing
TH0741R1
AB C D
Figure 17. Mounting Options.
Electrical Installation Notes
CAUTION:
• Standard cables can be used for the controller. However, when
mounting in an environment greatly exposed to Electrical Magnetic
Interface (EMI), use only shielded cables.
• The RWD62U is designed for 24 Vac operating voltage.
• Use safety insulating transformers with double insulation; they
must be designed for 100% duty.
• When using several transformers in one system, the connection
terminals G0 (ground) must be galvanically connected.
• Supplying voltages above 24 Vac to low voltage connections may
damage or destroy the controller or any other connected devices.
• Connections to voltages exceeding 24 Vac endanger personal
safety.
• The ARG62.21 Protective Housing does not provide grounding
between conduit connections. Use grounding bushings and jumper
wires or equivalent.
Commissioning Notes A commissioning booklet is included with the RWD62U controller.
Observe the following:
• The controller must be configured for application-specific operation using the
standard application number.
• Application-specific fine tuning can be performed if required (see the
commissioning booklet).
• Power supply to the controller and the connected devices must be guaranteed.
• Values and settings entered remain available even on power failure.
Siemens Building Technologies, Inc. Page 9

Technical Instructions RWD62U Universal Controller
Document Number 155-737
January 14, 2005
Wiring Diagrams
G0 Y2
D1 M X1 M X2 M G
M
Y1 M
Tool
TH0800R1
D1 Digital input
G, G0 24 Vac supply
M Ground (G0) for signal inputs
and universal inputs and analog
outputs
X1 Signal input (main input:
Siemens Ni 1000, Pt 1000 and 0
to10 Vdc)
X2 Signal input (aux. Input:
Siemens Ni1000, Pt 1000, 0
to10 Vdc and 0 to 1000 Ωor
0 to 10 Vdc remote setpoint)
Y1, Y2 Analog outputs
Tool Communication port for PC
(9-pin plug)
Figure 18. RWD62U Wiring Diagram.
TH0801R1
Y1
G
Y1
S1
D1
GO
Y..
BM BM
X1 X2MM
Y2
Y2
GO
G
Y..
X2X1
M
MM
GO
G
24 V SN
24 V SP
N1
TOOL
PC
GG
N1 RWD62U controller
PC Personal computer
S1 Time clock or switch
SN System neutral
SP System potential
X1 Main input (Termination G appears when X1 is an active sensor)
X2 Auxiliary input or remote setpoint (Termination G appears when X2 is an
active sensor)
Y1, Y2 Valve actuator 1 and 2/Damper actuator 1 and 2
Figure 19. Connection Diagram.
CAUTION:
if you use a DESKTOP computer, the TOOL signal ground is
galvanically connected to G0 inside the controller. If the signal line of
the computer is grounded to Earth, the G0 line after TOOL connection
will be grounded as well.
Page 10 Siemens Building Technologies, Inc.