Belimo CR24 Series, Информация о продукте

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Single room controller with three analog outputs
CR24-B3
14 www.belimo.com
Pr
oduct information S4-CR24-.. • en • v2.3 • 08.2022 • Subject t
o changes
Product features
Energy hold off
In energy saving mode, the room temperature is reduced to building protection level, i.e. either
the heating setpoint is significantly reduced or the cooling setpoint is significantly increased, for
instance in a room with an open window.
Stand-by
The room temperature is reduced to stand-by level, i.e. either the heating setpoint is slightly
reduced or the cooling setpoint is slightly increased, for instance in a room that is temporarily
unoccupied.
Frost
The frost protection function is activated if the actual room temperature falls below 10°C.
Change-over
Change-over heating or heating/cooling.
Chilled ceiling with dew point limiting
If the temperature falls below the dew point, the corresponding output is set to 0.
Boost
The room can be ventilated with the maximum volume flow (V’
max
) or heated or cooled with the
maximum capacity.
External temperature sensor
An external temperature sensor can be connected to the analog input ai1, for instance in order to
measure the average room temperature in the exhaust air duct.
External setpoint shift
An external DC 0...10 V signal at the analog input ai2 can be used to shift the basic setpoint 0...10
K, for instance for the summer/winter compensation.
These functions are described in detail on pages 17 to 24.
Electrical installation
Wiring diagram
1 2 9 10 11 6 7 8
3 4 12 5
~
0...10
V
+
AC 24 V
NTC
CR24-B3
ai/di1 di2 di3 ai2
ao1 ao2 ao3 U5
1
U5
2
Configuration / Prinzipal diagram
Y [V] Boost
t
R
[°C]
10
2
8.4
0
V
max
.
V
min
.
V
maxH
.
ao3
ao1
ao1
ao2
W
H
W
C
Configuration
DIP
Default-
settings
1 P-band normal P-band wide
2 V′
max
heating off V′
max
heating 80%
3 Output ao2
Heating
Output ao2
Change-over
Cooling
4 Input di3
Boost
Input di3
Change-over
Dew point
5 Boost
Temperature
controlled
Boost
V′
max
6 Control characteristic
PI
Control characteristic
P
1 2 3 4 5 6
Key
Y [V]
Output voltage in volt ao.. Analog outputs
t
R
[°C] Room temperature in degrees centigrade V'
max
Maximum volume flow
W
H
Heating setpoint V'
maxH
Maximum volume flow heating
W
C
Cooling setpoint V'
min
Minimum volume flow
Inputs Outputs
3
ai1 External temperature sensor 6 ao1 System output for Belimo VAV controller
di1 Energy hold off 9/10 ao3 Heating (3-point)
4 di2 Stand-by 11 ao2 Heating / Cooling
5 ai2 External setpoint shift Other connections
12 di3 Boost / Change-over / Dew point 7 PP1 Diagnostics socket 1
8 PP2 Diagnostics socket 2
Note
• Connect via safety isolation transformer.
• Parallel connection of other actuators possible.
Note the performance data.
!