3
368
RWC32 RWC82
POLYGYR®
Temperature controller for Comfort control in HVAC systems
• • • • • •
Fully autonomous, electronic temperature controller with P or PI response Operating voltage in accordance to type AC 230 V or AC 24 V Two temperature inputs for Landis & Staefa Ni 1000 temperature sensors One digital input for summer / winter or day/ night changeover One 3-position or two two-position outputs, direct or reverse action Entering or changing of all data via operating buttons on the controller, possible without additional tools
Use
The temperature controllers are primarily intended for Comfort ventilating and air conditioning plants. It can be mounted separately in a control panel or in the ARG62.101 housing in ducts, on walls and in plant rooms.
Functions
• Controller Stand-alone controller with one 3-position or two 2-position (ON / OFF) outputs with independent adjustment for heating and / or cooling. In 3-position operation, the controller exhibits PI response, and P-response in 2-position operation. • Auxiliary controllers – Analog input B2 for one of the following functions: – PI limitation – Remote setpoint – Temperature differential control – Setpoint compensation • Digital input D1 for one of the following functions: – Setpoint changeover day/ night – Operating mode changeover summer/ winter
Type summary
Accessories
Inputs
Outputs 3-position 2-position
Operating voltage
Type reference
Analog
Digital
2
1
1
2
AC 230 V
RWC32
2
1
1
2
AC 24 V
RWC82
Name Protective housing, to use an RWC32 or RWC82 for wall mounting
Siemens Building Technologies Building Automation
Type ARG62.101 CM2N3368E / 08.2001 1/8
Equipment combinations
The following Landis & Staefa units can be connected to RWC32 and RWC82 temperature controllers. Units
Data sheet no.
Sensor with Landis & Staefa Ni 1000 temperature sensing element
17... to 19...
Remote setpoint transmitter type FZA21.11 (0...1000 Ω)
19...
Air damper actuators with 3-position input
46...
Valve actuators with 3-position input
45...
Other combinations with third-party units are possible, provided the input and outputs specifications match those of the POLYGYRâ RWC32 respectively RWC82.
The RWC32 and RWC82 are temperature controllers and conduct both primary and auxiliary functions. The respective mode is defined by entering the corresponding configuration and setting parameters via the buttons.
Controller type
RWC32 and RWC82 controllers are used as 3-position controllers or as 2-step 2position controllers (ON / OFF).
Main functions
The RWC32 and RWC82 controllers can be programmed as follows: • 3-position controller: Q1 or Q2 heating or cooling • 2-position controller: Q1 and Q2 heating or cooling on each step SD1 2
ON
XDZ
SD1 2
Q1
Q2
OFF
3368D01
Technical design
Q
w
SD1
SD1
XDZ Q2
Q1
Q1
Q2
3368D02
3-position controller: heating or cooling
ON OFF
Q w
2-position controller: 2-step heating or 2-step cooling or 1-step heating and 1-step cooling Setpoint
Legend w = Setpoint Q = Load Q1 = Digital output1 Q2 = Digital output 2 XDZ = Dead zone SD1 = Switching differential 1
The heating setpoint to be set is assigned to heating sequence Q1 and positioned in the centre of the switching differential. The cooling setpoint exceeds the heating setpoint by the dead zone setting XDZ. The setting for XDZ must be at least 0.5 °C higher than the switching differential.
Zero energy band
CM2N3368E / 08.2001 2/8
The dead zone between heating and cooling is defined by the XDZ setting.
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Synchronisation of actuators
The RWC32 and RWC82 room temperature controllers configured as 3-position controllers control the actuators by means of an internal stroke model. For electic actuators it is therefore essential to synchronise the actuator with the lift model. There are 3 types of synchronisation:
Full synchronisation
After switching on the power
End-stop synchronisation
whenever the stroke model rearches a mechanical end stop the controller holds the actuator against this mechanical stop for a full running time cycle.
Periodic synchronisation
Every 24 hours a check is made to see that the actuator has run against the mechanical end-stop for a full running time cycle. Provided that this is the case, the synchronisation is realiased in the appropriate direction.
Inputs and outputs The analog input B1 is used exclusively for the main temperature sensor (Landis & Staefa Ni 1000).
Analog input B2
The analog input B2 is used either as an auxiliary temperature input (Landis & Staefa Ni 1000) or for the remote setpoint transmitter.
Digital input D1
The digital input D1 is used to select the setpoints or operating modes. Changeover occurs via potential-free contacts between D1 and GND.
Digital outputs Q
Each output Q (Q1, Q2) can be configured for either heating or cooling.
Example
Ventilating plant with temperature control
3368S01
Analog input B1
Q1
B1 Q1 Q2
Auxiliary functions
= = =
Room temperature Heating, reverse action Cooling, direct action
On Q1 Off RWC32/82
Q2
B1
Q2
Temp.
From the following auxiliary functions, one each can be configured: • PI limiter function • Remote setpoint • Temperature differential control • Setpoint compensation Additionally, one of the following functions can be selected: • Day/ night operation • Summer/ winter operation
PI limiter function
The limiter function with PI control enables absolute maximum or minimum limitation of the supply air temperature (B2). When the value drops below or exceeds the limiter setpoint, the limiter function overrides the standard control function to maintain the limiter setpoint.
D1
Q1
On Q1 Off RWC32/82
Q2
B2
B1
Q2
Temp. 3368S04
Siemens Building Technologies Building Automation
CM2N3368E / 08.2001 3/8
. . . . . . . . . . . . . . . .
Remote setpoint
A remote setpoint transmitter (FZA21.11 or QAA25), connected to B2 and configured accordingly, assumes the function of the setpoint D1
Two ranges are available: 0... 50 °C 0...100 °C Temperature differential
Q1
On Q1 Off RWC32/82
Q2
B2
B1
Q2
Temp. 3368S05
The controller forms the temperature differential from the measured values of sensors B1 and B2. If the differential exceeds the setpoint, the controller sends a corresponding output signal to outputs Q1 or Q2.
Q1 On Q1 Off RWC32/82
Q2
B2
B1
Q2
Diff. Temp.
Temp. 3368S06
Setpoint compensation
The temperature setpoint B1 is controlled by the temperature as measured at sensor B2. Configuration of the RWC32 or RWC82 defines the influence on setpoint B1. The example shows the supply air temperature setpoint as controlled by the outside temperature.
Q1 On Q1 Off RWC32/82
Q2
B2
B1
Q2
Diff. Temp.
Temp. 3368S07
Summer/ winter operation
CM2N3368E / 08.2001 4/8
D1−GND potential-free contact (thermostat) A thermostat contact between terminals D1 and GDN can be used to implement summer/ winter changeover. When the contact is closed, summer operation is selected. Output is set to direct action (cooling) for 3-position control. When the contact is open, winter operation is selected. Output is set to reverse action (heating) for 3-position control.
3368S02
D1−GND potential-free contact (timer) A timer contact between terminals D1 and GDN can be used to implement setpoint changeover for day/ night operation. When the contact is open, the setpoint for day operation is selected. When the contact is closed, the setpoint for night operation is selected.
D1
Q1
On Q1 Off RWC32/82
Q2
B1
Q2
Temp.
T
D1 3368S03
Day/ night setpoint
Q1
On Q1 Off RWC32/82
Q2
B1
Q2
Temp.
Siemens Building Technologies Building Automation
Mechanical design Housing
RWC32, RWC82 temperature controllers are compact units as per DIN 43 880 Gr. 1.
Protective housing ARG62.101
The ARG62.101 accommodates an RWC32 or RWC82. A protective housing is used to protect the controller when mounted outside a control panel, such as in ducts, on walls and in plant rooms. Furthermore, the protective housing prevents inadvertent contact with voltage supplying parts such as the connecting terminals. Brackets are used to attach the RWC32 or RWC82 in the protective housing. The cable entries are located at the top and on the sides of the protective housing. The front contains an LCD display and the programming buttons.
Mounting options
The RWC32 and RWC82 temperature controllers can be mounted as follows: • In a standard electrical control cabinet as per DIN 43 880 • Wall mounting in an ARG62.101 protective housing • Front mounting with standard available installation elements
Terminals
Plug-in screw terminals
Operating and display elements
The RWC32 and RWC82 are operated by means of the buttons on the controller front. Additional tools, such as PC tools, etc., are not necessary.
3368Z01
LCD
The LCD shows the following information for normal operation: • Current temperature • Current setpoint • Function of the second analog input The LCD shows the following information for test operation: • Status of Q1 and Q2 outputs • Temperature at sensor B1 • Temperature at sensor B2 • Status for digital input D1
Operating buttons
The controller has three operating buttons for the following functions:
SELECT ●
The SELECT ● button is used to select the next higher level in the configuration program. Pressing the SELECT button for 5 seconds opens the configuration mode. The SELECT button in this mode is used to change options.
▲/▼
The setting values are changed via the ▲ / ▼ operating buttons. Press both ▲ / ▼ buttons simultaneously to open the test mode.
Configuration
To configure the controller, follow the instructions supplied with the controller.
Siemens Building Technologies Building Automation
CM2N3368E / 08.2001 5/8
Engineering notes Intended use
Use this controller only for applications as described in the brief 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". The sections marked with a warning symbol as shown to the left contain technical safety requirements and restrictions. Observe all of these warnings as they directly relate to the protection of personnel and equipment.
Installation notes
The RWC32 and RWC82 controllers may be mounted as follows: Observe all local installation and mounting regulations. A B C
3368Z02
D
Electrical installation
On a DIN rail (EN 50 022-35 x 7.5) at least 120 mm long Wall mounting by means of 2 or 4 screws Front mounting by means of the following standard elements: 1x DIN rail 125 mm long, 2x hexagonal placeholders 50 mm with inside and outside thread M5 with 1x stud, 1x screw and 2x washers In the ARG62.101 protective housing
A
B
C
D
Standard cables can be used for the POLYGYR® system. However, when mounting in an environment greatly exposed to EMC, use only shielded cables.
• The RWC32 is designed for AC 230 V operating voltage. • The RWC82 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 60 730. Use safety insulating transformers with double insulation as per EN 60 742; 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 personnel safety.
Commissioning notes Required documentation
The following documents are required for commissioning: • All instructions supplied with the RWC32 and RWC82 controllers
Configuration and parameterization (programming)
The controller must be configured for plant-specific operation. In this regard, observe the following: • Power supply to the controller and the connected devices must be guaranteed • Values and settings entered in the devices are saved permanently, i.e., they remain available even on power failure
CM2N3368E / 08.2001 6/8
Siemens Building Technologies Building Automation
Technical data General data Operating voltage RWC32 Operating voltage RWC82 Safety extra-low voltage (SELV) as per Frequency RWC32 Frequency RWC82
AC 230 V ± 15 % AC 24 V ± 20 % EN 60 730 50 Hz / 60 Hz 50 Hz
Power input
RWC32, RWC82
3 VA
Prompting speed
Cycle time
2s
LCD
Actual and nominal values Resolution of values < 100
3 digits 0.5
Degree of prodection
Housing Front and with ARG62.101
IP 20 as per EN 60 529 IP 30 as per EN 60 529
Sensing element Range Resolution Max. cable length for dia. 0.6 mm
L&S Ni 1000 Ω at 0 °C − 35…+ 130 °C ± 0.5 °C max. 50 m (4.5 Ω line resistance corresponds to approx. 1 K differential)
Range Resolution Max. cable length for dia. 0.6 mm
0...1000 Ω (0...50 °C or 0...100 °C) ± 0.5 °C max. 50 m (10 Ω line resistance corresponds to 1% error)
Digital input D1
Polling voltage for control commands (D…GND) Current consumption
DC 12 V < 6 mA
Digital outputs Q1, Q2
Relay contacts (potential-free) Voltage Maximum current
AC 24...230 V 4 A resistive, 3 A ind.
Operation as per Climatic conditions Temperature Humidity Transport as per Climatic conditions Temperature Humidity Mechanical conditions
IEC721-3-3 Class 3K5 − 5...+ 50 °C < 95 % r.h. IEC721-3-2 Class 2K3 − 25...+ 70 °C < 95 % r.h. Class 2M2
Power supply
Analog inputs B1, B2 for temperature sensor
for remote setpoint transmitter B2
Environmental conditions
Standards Product standards conformity as per Electromagnetic compatibility
Miscellaneous Terminals Weight without packaging
Siemens Building Technologies Building Automation
Automatic electrical controls for household and similar use
EN 60 730
EMC directives Low voltage directive
89/336 EEC 73/23 EEC
Emissions as per Immunity as per
EN 50 081-1 EN 50 082-1
Screw terminals for cables with
min. 0.5 mm dia. max. 2 x 1.5 mm2 or 2.5 mm2
RWC32, RWC82 ARG62.101
0.300 kg 0.175 kg
CM2N3368E / 08.2001 7/8
3368A01
Diagrams Internal diagram L
D1 GND
B1 M1
G
B2 M2
RWC32
B1 M1
B2 M2
RWC82
Q11 Q14 Q12 Q21 Q24 Q22
Legend
G, G0 L, N M1, M2 B1 B2 Q... D1 GND G0
Connection diagram
G AC 24 V (L) AC 230 V
G0
Q11 Q14 Q12 Q21 Q24 Q22
AC 24 V supply AC 230 V supply Ground (G0) for signal inputs Signal input (main temperature) Signal input (aux. Temperature, remote setpoint) Digital output, various voltages permissible AC 24...230 V Digital input Ground (G0) for digital signal input Ground (G0) for signal outputs
3368A02
N
D1 GND
B M
B M
B1
S1
B2
N1 G(L)
B1 M1
B2 M2
D1 GND
RWC32/82
Q21
Q11
Q1
Q11
Q2
Q12 Q14 Q22 Q24
Q12 Q14 Q22 Q24
G0(N)
Q21
Q1
Q2
1.
Y1 Y2 G0(N)
2.
Y1
E1
G0 (N)
Legend
N1 B1 B2 S1 Q1/Q2 Y1 E1
RWC32/82 controllers Main temperature sensor Auxiliary temperature sensor or remote setpoint Timer or summer/winter thermostat Potential-free relay contacts for 3-position or 2-position control in 2 steps Actuator with 3-position control AC 24...230 V Electrical load 2-position control
RWC32/82 Dimensions in mm
CM2N3368E / 08.2001 8/8
56.7 49.7 33.1
120
162.6
84
99
105 97
3368M01
Dimensions
ARG62.101
1999 Siemens Building Technologies Ltd.
Siemens Building Technologies Building Automation
