49
ENG
Electrical connections
g0300122EN rel. 1.0 - 01.12.2021
EXTERNAL PROPORTIONAL CONTROLLER and REMOTE CONTACT (modulating operation)
• connect terminals 1U and 2U (production request) to a humidistat;
• connect inputs 7U and 8U (enable) to a remote contact (e.g.: switch, timer,...);
• to enable control, set:
1U 2U
3U 4U 5U 6U
7U 8U
9U 10U 11U 12U 13U 14U
U
OU
T
REF
Fig. 9.j
Index
Parameter
Description
Ea01
Control type
proportional to external signal
Ea03
Proportional band Set: Hysteresis (0-100%) - Min-
imum production (25%-00%) -
Maximum production (25%-100%)
Ec01
Type of main
probe
Select from: 0 - 1V, 0 - 10V, 2 - 10V,
0 - 20mA, 4 - 20mA
Tab. 9.g
EXTERNAL PROPORTIONAL CONTROLLER and REMOTE CONTACT (modulating operation) with LIMIT PROBE
• short-circuit terminals 7U and 8U (jumper) to enable production; alternatively connect terminals 7U – 8U to a remote contact
(e.g.: switch, timer,...);
• connect terminals 1U and 2U (production request) to an external controller;
• connect the active limit probe to terminals 5U, 3U (+12Vdc), 6U (GND);
• to enable control, set:
Notice:
when using 0-10 V probes, connect the probe power (G) to terminal “G” on the board rather than terminal 3U.
1U 2U
3U 4U 5U 6U
7U 8U
9U 10U 11U 12U 13U 14U
U
OU
T
REF
OU
T H/T
M
+ (G)
Fig. 9.k
Index
Parameter
Description
Ea01
Control type Proportional to external signal with
limit probe
Ea03
Proportional
band
Set: Hysteresis (0-100%) - Minimum
production (25%-00%) - Maximum
production (25%-100%)
Ea06
Limit probe
Set: Humidity set point (0-100 %rH) -
Diff erential (20 %rh)
Ec01
Type of main
probe
Select from: 0 - 1V, 0 - 10V, 2 - 10V, 0 -
20mA, 4 - 20mA
Ec02
Limit probe
type
Select from: 0 - 1V, 0 - 10V, 2 - 10V, 0 -
20mA, 4 - 20mA
Tab. 9.h
Notice:
in industrial environments (IEC EN61000-6-2) the signal cables leaving the humidifi er must not exceed 30 m (98’)
in length: steam production signal cable (terminals 1U, 2U), digital remote on/off input (terminals 7U, 8U) and shielded cable for
RS485 communication.
9.3
C
ontrol with humidity probes
The main control board, connected to a room humidity probe, manages steam production based on the humidity measured.
A second outlet humidity limit probe can also be connected: with this confi guration, typical of air handling units, the controller
continues managing steam production according to the humidity requirement, however production is limited according to the
relative humidity measured in the outlet duct.
RC
HP
HLP
Key:
HP
Room humidity control probe
(intake/room humidity probe)
RC
Remote contact
HLP
Limit humidity probe (outlet humidity probe)
Fig. 9.l