Carel humiSonic, User Manual, Page: 47 / 72

13
ENG
Direct version for room applic. +0300062EE - rel. 1.4 - 24.09.2020
5.3 Main board connections
Depending on the type of signal used, atomised water production can
be enabled and/or managed in different ways (ON/OFF or modulating).
HUMIDISTAT O R R EMOTE CONTACT (ON/OFF action)
Production is enabled by closing terminal M14.
M14 can be connected to a switch, a humidistat or a controller (voltage-
free contact, max 5 Vdc open, max 7 mA closed).
M 14
Remote
ON/OFF
+ GND
G
G0
Fig. 5.g
TH TEMPE R ATU R E & HUMIDITY P R OBE (built-in on part numbers
UU** R *AS01)
If the TH
temperature and
humidity probe is connected to terminal G,
atomised water production starts when:
• terminal M14 is closed;
• in humidity control mode (A0 = 3), The humidity value measured by
the probe is lower than the set point (pre-set at 50% rH and modifiable
via dipswitches 5-6 or on the display);
• in dew point temperature control mode (A0 = 4), the dew point value
calculated based on the temperature and humidity measured by the
probe is lower than the set point (pre-set at 10°C/50°F and modifiable
via the optional display).
485 SE R IAL CONNECTION
Carel/Modbus protocol
R S 485
-
+
GND
M 11
Fig. 5.h
NO TICE: for RS485 connections in household (IEC EN 55014-1) and
residential (IEC EN 61000-6-3) environments, use shielded cable (with
shield connected to PE both on the terminal and controller ends),
maximum length specified by the EIA RS485 protocol, equivalent to
European standard CCITT V11, using AWG26 twisted pair cable; the input
impedance of the 485 stage is 1/8 unit-load (96 kOhm). This configuration
allows a maximum of 256 devices to be connected, with cables in
separate conduits from the power cable.
ALA R M R ELAY
The connections can be used to directly control a light or an auxiliary
relay coil or signal when reaching the humidity or dew point temperature
set point (see table of parameter b0 values).
M9
M10 J8
1 2 3 4 5
J17
COMMON
NO
Fig. 5.i
NO TICE
: in industrial environments (IEC EN61000-6-2) the signal cables
leaving the unit must not exceed 10 m (33 ft) (1) in length: remote on/
off digital input (terminals M14.1-M14.2) and shielded cable for RS485
communication.
5.4 Auxiliary card connections
See chap. ”Configuration parameters” for the description of parameters
A0, A1, A2.
M9
M10 J8
1 2 3 4 5
J17
COMMON
NO
1 2
OUT
GND
21 Vdc
Fig. 5.j
The auxiliary card features the following connections:
ON/OFF CONT R OL (humidistat or remote switch)
• jumper inputs M14.1 and M14.2 (enable) on the main board;
• connect terminals M10.1 and M10.2 to a humidistat or a remote switch
(voltage-free contact);
• set parameter A0=0 to enable On/Off operation.
EXTE R NAL P R OPO R TIONAL CONT R OL (modulating operation)
• jumper inputs M14.1 and M14.2 (enable) on the main board;
• connect terminals M10.1 and M10.2 (production request) to an
external controller;
• set parameter A0=1 to enable modulating control and parameter A2
depending on the chosen signal (0 to 10 V, 2 to 10V, 0 to 20, 4 to 20
mA).
CONT R OL WITH CA R EL HUMIDITY P R OBE
• jumper inputs M14.1 and M14.2 (enable) on the main board;
• connect the probe to terminals M10.1, M10.2. The power terminal
M10.3 can be connected via a cable with a maximum length of 2 m
(6.6 ft); for longer connections, use an external power supply with the
earth electrically connected to the controller’s earth.
• set parameter A0=2 to enable control via probe and parameter A2
depending on the chosen signal (0 to 10 V, 2 to 10V, 0 to 20, 4 to 20
mA).
If non-CAREL probes are used, check:
• voltage signal 0-10 Vdc, 2-10 Vdc, terminal M10.1 (GND: M10.2);
• current signal: 4 to 20, 0 to 20 mA, terminal M10.1 (GND: M10.2).
ENABLE TH P R OBE AS HUMIDITY LIMIT / DEW POINT TEMPE R ATU R E
In control modes A0 = 0, A0 = 1, A0 = 2, the built-in temperature and
humidity probe (TH) can be used as a humidity limit probe or dew point
temperature limit probe by setting parameter bH=1 or bH=2 respectively.
The limit set point and proportional band are set by parameters SL and
bL.
Final checks
The following conditions represent correct electrical connection:
Ƒ
mains power to the humidifier corresponds to the voltage shown on
the rating plate;
Ƒ
a mains disconnect switch has been installed so as to be able to
disconnect power to the humidifier;
Ƒ
terminals M14.1, M14.2 are jumpered or connected to a contact to
enable operation;
Ƒ
if the humidifier is controlled by an external controller (with auxiliary
card), the signal earth is electrically connected to the controller’s earth.