NRT405F902
3
Nº
Description
FS
25
Configuration of fan control:
0=No control, 1=The fan is controlled by the heat-
ing requirement, 2=The fan is controlled by the
cooling requirement, 3=The fan is controlled by
the heating and cooling requirement
When using an electric heater, this parameter
should only be set to 1 or 3, or the heater may be
overheated.
3
26
Start signal in % of the controller output, heating
or cooling, for fan speed 1
20 (5
when
using an
electric
heater)
27
Start signal in % of the controller output, heating
or cooling, for fan speed 2
60
28
Start signal in % of the controller output, heating
or cooling, for fan speed 3
100
29
Hysteresis for start/stop of fans in % of the control-
ler output
5
30
Number of fan speeds
3
31
Fan speed in the Auto mode:
0=The fan speed follows the cooling/heating
output, 1=The fan speed is minimum limited to
the lowest speed
1
32
Temperature compensation on AI1
0 K
33
Temperature compensation for the internal room
sensor.
0 K
34
Highest permitted setpoint offset upwards. Set-
table value=0...13 K. Starting point=22°C.
13 K
35
Highest permitted setpoint offset downwards. Set-
table value=0...17 K. Starting point=22°C.
17 K
36
NO/NC digital input 1:
0=NO, 1=NC
0
37
NO/NC universal input 1:
0=NO, 1=NC
0
38
Not used for this model
1
39
Not used for this model
1
40
Manual/Auto heating output signal:
0=Off, 1=Manual, 2=Auto
2
41
Manual/Auto cooling output signal:
0=Off, 1=Manual, 2=Auto
2
Nº
Description
FS
42
Heating output signal in manual mode
0
43
Cooling output signal in manual mode
0
44
Model
-
45
Version Major
-
46
Version Minor
-
47
Released or beta version
-
48
Revision
-
49
Display backlight low
10
50
Display backlight high
30
51
PLA address
-
52
ELA address
-
53
Modbus address
254
54
Modbus communication parity bit:
0=No parity, 1=Odd parity, 2=Even parity
2
55
Modbus timeout for character (t1.5) in ms. Should
be 1.5 times a character, i.e. at least 2 ms.
2 ms
56
Modbus answer delay (t3.5) in ms. Should be 3.5
times a character, i.e. at least 5 ms.
5 ms
57
Communication protocol:
0=Modbus, 1=BACnet MS/TP
0
58
BACnet MS/TP MAC address
0-127=master address, 128-254=slave address
-
59
The 4 low numbers in the BACnet device ID,
0-9999
-
60
The 3 high numbers in the BACnet device ID
-
61
BACnet MS/TP Max. master
127
62
Communication protocol speed:
0=9600 bps, 1=19200 bps, 2=38400 bps,
3=76800 bps (alternative 3 only applies to BAC-
net)
0
63
Resets communication parameters (not address-
es) to their factory settings:
1=Factory settings (Modbus@9600)
0
64
Basic setpoint. Settable value=5...50°C.
22°C
Wiring
10
20
30
LOGIC
40
50
POWER
Figure 4: Bottom plate connections
B
Figure 5: Connection diagram
