Dantherm CDF 40 Service Manual page 15

Installation: Electrical connection
!
It is the responsibility of the installer to ensure the conformity towards national regulations of
NOTICE
all, not supplied cables.
Control panel The interfaces and terminals on the control panel make it possible to communicate with the
interfaces dehumidifier and connect accessory such as a RH/T sensor, an alarm and a heating coil. The
figure and table below describe the different functions of the interface.
Pos . Interface
1
2
3
4
5
External RH/T There is an option for connecting an external RH/T sensor, which makes it possible to overrule
sensor connection the internal sensors. In Fig. 5 there is an example on how it could be connected.
(Optional)
*Switch in position: 0 = Internal sensors in use, 1 = External sensors in use
**Note, operational range is within 40-99% RH, if out of range the dehumidifier will be in
stand by mode
USB RS485
1
Description
USB USB is used for datalogging/ software update. See more information
in section "Software update and log files" on page 20.
Modbus RTU Connection via modbus. A list of data for the Modbus interface can be
(RS-485) downloaded on support.dantherm.com
External Terminals for connecting an external humidity/ temperature sensor.
See wiring example in Fig. 5
RH/T sensor
Alarm An external alarm can reveal, if the dehumidifier is operating normally
or has an error. See wiring example in Fig. 6
12 VDC Connection of LPHW (water) or electric heating helps controlling the
Heat control indoor temperature. Contact your Dantherm dealer for more informa-
tion.
ON/OFF switch for
external sensors*
0
(Optional)
1
10k NTC
External temperature sensor
(or resistor)
RUN FAIL
EXT RH/T ALARM
2 3 4
Fig. 4
EXT RH/T
EXT RH/T
External humidity sensor
(or control unit)
Fig. 5
HEAT1 HEAT2
OK
12V DC
5
0V = 0% RH
5V = 50% RH
10V = 100% RH**
0-10V
GND
15