Siemens RWD62 User manual

CE2N3342en
2017-12-05 Building Technologies
3
342
RWD62
Universal Controller RWD62
For comfort control in HVAC&R-Systems
·Standalone electronic universal controller with P or PI response
·Operating voltage in accordance to type AC 24 V
·Control application selectable via Application Number
·Active input scale can be selectable
·Limit and direction of the output scale is able to be freely assigned
·Two universal inputs for Ni 1000, Pt 1000 temperature sensors and
DC 0…10 V signals
·Unit can be set as °C, °F, % or no specified unit
·Two modulating outputs with DC 0…10 V 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, possi-
ble without additional tools
·PC connection for downloading canned applications via the software tool
Use
The universal controllers are intended for Heating, Ventilating, Air-Conditioning and
Refrigeration in comfort control plants. It can be mounted in a control panel or in the
ARG62.21/ARG62.22 housing on ducts, walls and in plant rooms.

2/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
HVAC&R Application
Measurement and control of temperature, relative humidity, absolute humidity, en-
thalpy, pressure differential, volumetric airflow and indoor air quality. The input scale
can be set from –100 units to 8,000 units. The start and end points of output voltage
can be any value between DC 0 V to DC 10 V.
Functions Summary
·Controller
Stand-alone controller with two DC 0…10 V outputs with independent adjustment on
each sequence for direct acting and/ or reverse acting. Adjustable parameters includ-
ing proportional band and integral action time.
·Auxiliary selectable function
Universal input X2 for one of the following functions:
-PI limiter function (absolute and relative)
-Remote setpoint function
-Cascade control function
-Setpoint compensation
-Winter/summer operation
-Maximum priority
·Digital input D1 for setpoint changeover day/ night
Type summary
Inputs Outputs Type Reference
Universal Digital Analog Digital
2120RWD62
Name Type
Protective small enclosure for wall mounting ARG62.21
Protective big enclosure for wall mounting ARG62.22
Software Tool S3341A031EN0
Equipment combinations
The following Siemens units can be connected to RWD62 universal controller.
Units Data sheet no.
Sensor with LG-Ni 1000 temperature sensing element 17… to 19…
Sensor with Pt 1000 temperature sensing element 1846
Sensor with DC 0…10 V measuring signal 17… to 19…
Room temperature sensor with setpoint adjuster QAA25
or QAA25/AP
1721 / 1748
Remote setpoint adjusters FZA21.11 and FZA61.11 19…
Air damper actuators with DC 0…10 V input 46…
Valve actuators with DC 0…10 V input 45…
Control valves 46…
Signal converter SEM 61.4 for current valve control 51…
Various signal converters 34…
Accessories

3/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
Other combinations with third-party units are possible, provided the input and output
specifications match the RWD62.
A software tool for controller application selection and parameter adjustment is avail-
able. It is a user-friendly Windows® 95 (or above) based software tool which provides
you a printout of the controller settings.
Functions
The RWD62 is a stand-alone universal controller, which performs both primary and
auxiliary control functions. The respective mode is defined by entering the correspond-
ing configuration and setting parameters via the push buttons on the controller or the
software tool.
The RWD62 controller can be programmed as follows:
One sequence: Y1 or Y2 reverse or direct acting
Two sequence: Y1 and Y2 reverse and direct acting or
Y1 and Y2 reverse and reverse acting or
Y1 and Y2 direct and direct acting
Y1
Output
Voltage
Setpoint
Load
3342d01
3342d02
Y1
Output
Voltage
Load
Y2
Setpoint
Reverse acting sequence
(application no.: 10…19)
2 Reverse acting sequences
(application no.: 20…29)
Y1
Setpoint Load
Y2
3342d03
Output
Voltage
Y1
Setpoint
Load
3342d04
Output
Voltage
Reverse and direct acting sequences
(application no.: 30…39)
Direct acting sequence
(application no.: 40…49)
3342d05
Output
Voltage
Y1
Setpoint Load
Y2
2 Direct acting sequences
(application no.: 50…59)
Software Tool
Controller type
Main functions

4/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
The universal input X1 is used as the primary input for a LG- Ni 1000 temperature sen-
sor, a Pt 1000 temperature sensor or a DC 0…10 V active input.
The universal input X2 is used as the secondary input for a LG-Ni 1000 temperature
sensor, a Pt 1000 temperature sensor, an active/passive remote setpoint transmitter or
a DC 0…10 V active input.
The digital input D1 is used to select the day or night changeover. Changeover occurs
via potential-free contacts between D1 and M.
Each output Y (Y1, Y2) can be configured for either reverse or direct acting. The modu-
lating voltage output (Y…) controls the devices requiring a DC 0…10 V signal.
Ventilating plant with temperature control
X1 Room temperature
Y1 Heating, reverse action
Y2 Cooling, direct action
X1
Y2Y1
Temp.
RWD62
Y
3342s01
One of the following auxiliary functions can be selected:
·PI limiter function (absolute and relative)
·Remote setpoint function
·Cascade control function
·Setpoint compensation
·Winter/summer operation
·Maximum priority
Additionally, the day and night operation mode is available.
The limiter function with PI 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.
X1
Y2Y1
Temp.
RWD62
YX2
3342s02
A remote setpoint transmitter (FZA21.11, QAA25 or
QAA25/AP), connected to X2 and configured accord-
ingly, enables setpoint adjustment.
Active measurement from 0…10 V DC corresponding
adjustable range from –100 to 8000
Passive measurement from 0…1000 Wcorresponding
adjustable range from –100 to 8000
X1
Y2Y1
Temp.
RWD62
Y
X2
3342s03
Universal input X1
Universal input X2
Digital input D1
Analog outputs
Example
Auxiliary functions
PI limiter function
Remote setpoint
Cascade control

5/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
X2 Supply air temperature sensor
You can select the PI/PI room/supply air
temperature cascade control. In this case, the
virtual PI room temperature controller determines
the setpoint within the limiter setpoints for the PI
supply air temperature controller.
X1Y2Y1
Temp.
RWD62
YX2
3342s04
Maximum priority, cooling
If the value (0…10 V) 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.
X2Y2Y1
Temp.
RWD62
Y
X1
3342s05
The temperature setpoint X1 is shifted by the tem-
perature as measured at sensor X2.
Configuration of the RWD62 defines the influence
on setpoint X1.
The example shows the room air temperature
setpoint as controlled by the outside temperature.
3342s06
X2
Y1
Temp.
RWD62
Y
X1
A digital switch or analogue input between termi-
nals X2 and M can be used to implement win-
ter/summer changeover.
Digital changeover
When the contact is closed, summer operation is
selected. Reverse acting output (Y1 only) is set
to direct action (cooling).
Analog changeover
When the X2 input exceeds the setpoint, sum-
mer operation is selected. Reverse acting output
(Y1 only) is set to direct action (cooling).
X1
Y2Y1
Temp.
RWD62
Y
T
X2
3342s07
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 func-
tions are disabled: remote setpoint, abso-
lute/relative limiter, setpoint compensation and
maximum priority.
X1
Y2Y1
Temp.
RWD62
Y
D1
3342s08
Maximum priority
Setpoint compensation
Winter/ summer
operation
Day/ night setpoint

6/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
Mechanical design
The RWD62 universal controller is as per DIN 43 880 Gr. 1 requirements.
A protective housing is used to protect the controller when mounted outside a control
panel, such as on ducts, walls and in plant rooms. Furthermore, the protective housing
prevents inadvertent contact with voltage supplying parts such as the connecting termi-
nals.
The RWD62 clips into the protective housing.
The cable entries are located at the top and the bottom of the protective housing.
The front has an opening for the LCD display and the programming buttons.
The RWD62 universal controller can be mounted as follows:
·In a standard electrical control cabinet as per DIN 43 880
·Wall mounted in a protective housing
·Front mounting with standard available installation elements
Plug-in screw terminals
The RWD62 is operated by the buttons on the controller front. Additional tools are not
necessary. A 9-pin port is provided for optional programming via the software tool.
3342z01
The LCD shows the following information for normal operation:
·Current operating values (maximum 4 digits)
·Current setpoints (day/night)
·Application number
·Output voltage value
·Control sequencing diagram
·Auxiliary input value
·Selected auxiliary function
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.
To configure the controller, follow the instructions supplied with the controller.
Engineering notes
Use this controller only for applications as described in the description on the title page
(bold print) and the section "Use". Additionally, observe all conditions and restrictions
imposed in this section and in "Technical data".
Housing
Protective housing
ARG62.21/ARG62.22
Mounting options
Terminals
Operating and display
elements
LCD
Operating buttons
SELECT
Configuration
Intended use

7/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
The sections marked with a warning symbol contain technical safety requirements and
restrictions. Observe all of these warnings as they directly relate to the protection of
person and equipment.
Installation notes
Observe all local installation and mounting regulations.
The RWD62 controllers can be mounted as follows:
A On a top hat rail (EN60715, 35 × 7.5) at least 120 mm long
B Wall mounted with 2 screws
C Front mounted using standard elements, e.g.
1 × top hat rail 150 mm long
2 × hexagonal placeholders 50 mm
washers and screws
D In the ARG62.21/ARG62.22 protective housing
Standard cables can be used for the controller. However, when mounting in an envi-
ronment greatly exposed to EMI, use only shielded cables.
The RWD62 is designed for AC 24 V operating voltage.
The low voltage must comply with the requirements for safety extra-low voltage (SELV)
as per EN 60730.
Use safety insulating transformers with double insulation as per EN 60742; they must
be designed for 100 % on-time.
When using several transformers in one system, the connection terminals G0 must be
galvanically connected.
Supplying voltages above AC 24 V to low voltage connections may damage or destroy
the controller or any other connected devices. Additionally, connections to voltages
exceeding AC 42 V endanger personal safety.
Commissioning notes
A booklet is supplied with the RWD62 controller for commissioning.
Observe the following:
·The controller must be configured for plant-specific operation using standard applica-
tion number
·Plant specific fine tuning can be performed if required (refer to 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
Electrical installation

8/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
Disposal
Technical data
Operating voltage
Safety extra-low voltage (SELV) as per
Frequency
AC 24 V ±20 %
EN 60730
50 Hz/60 Hz
RWD62 2.5 VA
Actual and nominal values 4 digits
LG-Ni 1000
Pt 1000
Active sensor
0.5 °C
0.5 °C
Depends on the setting range
Transport
Climatic conditions
Temperature
Humidity
Mechanical conditions
IEC721-3-2
Class 2K3
-25…+70 °C
<95 % r.h.
Class 2M2
Operation
Climatic conditions
Temperature
Humidity
IEC721-3-3
Class 3K5
0…+50 °C
<95 % r.h.
Housing
Front and with ARG62.21
Front and with ARG62.22
IP 20 as per EN 60529
IP 30 as per EN 60529
IP 30 as per EN 60529
EU Conformity (CE)
RCM Conformity
CE2T3341xx *)
CE2T3341en_c1 *)
The product environmental declaration CE1E3343en *) contains data on environmentally
compatible product design and assessments (RoHS compliance, materials composition,
packaging, environmental benefit, disposal).
Screw terminals for cables with min. 0.5 mm dia.
max. 2 x 1.5 mm2or 2.5 mm2
RWD62 0.277 kg
*) The documents can be downloaded from http://siemens.com/bt/download.
The device is considered electrical and electronic equipment for dis-
posal in terms of the applicable European Directive and may not be
disposed of as domestic garbage.
·Dispose of the device through channels provided for this purpose.
·Comply with all local and currently applicable laws and regula-
tions.
General data
Power supply
Power consumption
LCD
Display resolution for (these
values do not relate to the
controller accuracy)
Environmental
conditions
Environmental
conditions
IP code
Norms and standards
Terminals
Weight without packag-
ing
Environmental compati-
bility

9/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
Controller measuring range
Max. cable length for dia. 0.6 mm
-50…+150 °C
max. 300 m
Controller measuring range
Max. cable length for dia. 0.6 mm
-20…+180 °C
max. 300 m
Range
Max. cable length for dia. 0.6 mm
DC 0…10 V corresponding to adjustable
range from –100 to 8000 (°C, °F, % or
no unit)
max. 300 m
Range
Max. cable length for dia. 0.6 mm
0…1000 Wcorresponding to adjustable
range from –100 to 8000 (°C, °F, % or
no unit)
max. 300 m
Polling voltage for control commands (D…M)
Current consumption
DC 15 V
<15 mA
Range
Maximum current
DC 0…10 V
±1 mA
Internal diagram
G0
RWD62
Y2
D1M X1M X2 M G
MY1 M
Tool
3342g01
D1 Digital input
G, G0 AC 24 V supply
( SELV AC 24 V power supply)
MGround (G0) for signal inputs, universal inputs and analog outputs
X1 Signal input (main input: LS Ni 1000, Pt 1000 and 0…10 V DC)
X2 Signal input (aux. input: LS Ni 1000, Pt 1000, 0 …10 V DC and 0…1000 Wor
0…10 V DC remote setpoint)
Y1, Y2 Analog outputs
Tool Communication port for PC (9-pin plug)
Connection diagram
Analog inputs X1, X2
LG-Ni 1000 Wat 0 °C
Pt 1000 Wat 0 °C
Analog voltages
(for measured variables
in °C, % or without unit)
Remote setpoints X2
Digital input D1
Analog outputs Y1, Y2

10/10
Siem ens RWD62 Universal controller CE2N3342en
Building Technologies 2017-12-05
N1 RW D62 controller
PC Personal computer
S1 Time clock or switch
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
Please note that if you use a DESKTOP computer, the TOOL signal ground is gal-
vanically 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 Earthed as well.
This will change from SELV to a PELV.
Dimensions
ARG62.21 = 150
2
0
0
61.5
48.5
ARG62.22 = 345
Published by:
Siemens Switzerland Ltd.
Building Technologies Division
International Headquarters
Gubelstrasse 22
6301 Zug
Switzerland
Tel. [phone]
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd 2017
Delivery and technical specifications subject to change
Note
RWD62
ARG62.21 / ARG62.22