GENERAL CHARACTERISTICS
DIGITAL HUMIDITY
CONTROLLER
with two outputs
EC 4-432
* Size: 48 x 48 mm.
* 230 Vac power-supply (standard)
* Custom configuration through keyboard or Personal
Computer (on request)
* Configuration parameters accessible through Password
* Three digits display, height: 12,5mm.
* Indication of humidity with decimal point
EC 4-432, a digital two outputs humidity controller, thanks to the technological solutions, offers an easy flexibility of
use in a small size box.
The instrument has been designed to work with current output 0-20 mA or 4-20 mA 2 or 3 wires humidity transducers
(for example EC UMD 00 and EC UMD 01 manufactured by Every Control) and can provide to the power-supply as long
as they are abled to work inside a range of supply-voltage between 9 an 20 V.
The SPDT relays (output 1 and 2), can manage (up to) 8A loads to 230 Vac and are supplied in standard version; as
option, it is possible to request the outputs with low-voltage signal, suitable to drive the SSR modules (solid state
relay).
The regulator can be configured, trough a parameter modifiable by the user, in three different ways of working:
with Setpoint 1 absolute, and Setpoint 2 relative to the first;
with two absolute indipendent Setpoints;
in this two cases each output can be easily programmed for "humidify" functioning (reverse) or for "dehumidify" (direct);
with "dead zone functioning" ; in this case the output 1 intervenes every time the relative humidity goes over the
Setpoint plus the dead zone value; while output 2 does it every time the relative humidity goes under the Setpoint
minus the dead zone value: this way of functioning finds wide application in conditioning systems.
Besides that, trough some parameters programming, it is possible to submit the outputs activation to a series of delays,
in order to guarantee a proper use of the connected load.
Failure of functioning, defective probe, corrupted memory-data or probe-signal outside the limits are indicated by the
flashing display, in order to catch user's attention.
The instrument is provided of two humidity alarms, that can be disabled, each of them is configurable in six different
ways of working; the intervention of each alarm determines the displaying of the indication "AL 1" (or "AL 2") alternated
with the measured relative humidity value.
* Configurable regulator with 2 absolute Setpoints,
one absolute and one relative, dead zone
* Two relays output (8A at 230 Vac)
* Two widely configurable humidity-alarms
* Setpoints locking facility
EC 4-432E 3/95
1
MOUNTING
For a proper mounting, take note of the attached indications; be sure that the conditions of use (voltage of power-
supply, environment temperature, humidity) are inside the instrument working limits.
Do not overload the relay-outputs, keep inside the indicated limits.
Voltage at terminal 15 is not stabilized. If the transducer is powered by the instrument, it should be verified that in all
working conditions, especially for high humidity values, the voltage on the transducer does not drop below the
minimum working value, in order to guarantee a correct measure.
WARNING : The instrument is not protected from overloads; so it is necessary to give the outputs the suitable
protections; the power-supply is protected by an internal fusible.
CONFIGURATION
There are two levels of configuration (LEVEL 2 is protected by PASSWORD):
Level 1
Push and at the same time, for 4 seconds at least :
the symbol "PA" appear on the display
Push or to select the parameter to modify at LEVEL 1
Push and or to modify the selected parameter.
Level 2
From LEVEL 1 push or to selected the parameter "PA"
Push and or to set "-19"
Push and at the same time for 4 seconds at least :
the first parameter of LEVEL 2 will appear on the display.
Push or to selected the parameter to modify at LEVEL 2
Push and or to modify the selected parameter.
How to leave "Configuration"
Push and at the same time for 4 seconds at least or wait for 50 seconds
without operating on the keyboard, or stop and restart the instrument.
USE
When not working the instrument displays the value read by the probe. Push to the display the actual Setpoint
value; the led "out 1" will flash; to change the first Setpoint value push and or .
If the parameter rA5 has value 1, the first Setpoint can not be modified. After changing, release the key as last.
For the two seconds following the release of the key ,the led "out 1" flashes to indicate that pushing again we
enter display and changing of the second Setpoint: if no key gets pushed within two seconds, the instrument returns
to the basic status. To change the value of the second Setpoint, push again, within two seconds since the first
release of the same key, afterwards operate like for the first Setpoint; the led "out 2" will flash.
If parameter rB5 has value 1, the second Setpoint can not be changed. If the parameter –/0 has value 3 the second
Setpoint does not exist.
SIGNALS AND ALARMS
The led "out 1" (or "out 2"), when lighted, indicates that the output 1 (or the output 2) is activated; if it is flashing it
indicates that the instrument is in phase of delay-temporisation at the output.
"E0" flashing on the display means one of the following defects: defective probe or wrong connection (in case of not
connected probe, the indication "EO" will appear if the parameter is /0=30 (4-20 mA) and "0" if the parameter is /
0=31 (4-20 mA)).
"E2" flashing on the display : failure of memorised configuration-data; try to switch the power-supply off, and then,
switch it on.
If the display indicates a proper value alternated to the signal "AL 1" (or "AL 2"), it means that the relative humidity read by
the probe is off the limits previously set in parameters "AA1" and/or "Ab1".
EC 4-432E 3/95
2
CONFIGURATION PARAMETERS
CODE PARAMETER DESCRIPTION MIN MAX U.M. ST
–/0 REGULATOR SELECTION 1=1 absolute and 1 relative setpoint; 0 3 ---- 2
2=2 absolute setpoint;
3=dead zone.
(1) PA PASSWORD -55 +99 ----
/ PROBE
/0 kind of probe 30 = 4-20 mA ; 31 = 0-20 mA 30 31 ---- 30
(1) /1 calibration (measure offset) -9.0 +10 %rH 0
/2 digital filter (speed response) 0=0s; 1=0.4s; 2=1.2s; 3=3.0s; 4=8.0s; 5=19.8s; 6=48.0s 0 6 ---- 3
/4 without leading zeros 0=NO; 1=YES 0 1 ---- 0
/5 with decimal point 0=NO; 1=YES 0 1 ---- 0
/6 start of scale for input 0-20 mA or 4-20 mA corrispondent to input's minimum value -99 999 %rH 0
/7 end of scale for input 0-20 mA or 4-20 mA corrispondent to input's maximum value -99 999 %rH 100
rA/rB HUMIDITY REGULATOR rA=refered to setpoint 1; rB=refered to setpoint 2
(1),(2) rA/rB0 regulator hysteresis (differential) -99 +999 %rH 0
rA/rB1 minimum setpoint admitted -99 +999 %rH 0
rA/rB2 maximum setpoint admitted -99 +999 %rH 100
rA/rB3 output action 0=direct (dehumidify); 1=reverse (humidify) 0 1 ---- 1
rA/rB4 hysteresis selection 0=asymmetric; 1=symmetric 0 1 ---- 0
rA/rB5 setpoint adjustement locking 0=unlocked; 1=locked 0 1 ---- 0
CA/CB OUTPUTS ACTIVATION DELAY CA=refered to output 1; CB=refered to output 2
CA/CB0 output activation delay since instrument power-on 0 999 sec 0
CA/CB1 after start delay 0 999 sec 0
CA/CB2 after stop delay 0 999 sec 0
CA/CB3 relay output status in case of probe failure 0=OFF; 1=ON 0 1 ---- 0
CA/CB4 ON and OFF delay 0=no delay; 1=3sec 0 1 ---- 0
AA/Ab ALARM AA=refered to alarm 1; Ab=refered to alarm 2
AA/Ab0 alarm hysteresis (differential) 1 +99 %rH 0
AA/Ab1 alarm setpoint -99 +999 %rH 0
AA/Ab3 alarm disabling time since instrument power-on 0 999 min 0
AA/Ab4 alarm mode see table 1 1
L NETWORK CONNECTION
L1 instrument address 1 15 ---- 1
L2 instrument group 0 7 ---- 0
notes
(1) = configuration parameter on LEVEL 1
(2) = represents dead zone value if parameter –/0=3.
TABLE 1
parameter AA/Ab4 alarm mode
1 disabled
2 absolute minimum alarm
3 absolute maximum alarm
4 minimum alarm relative to setpoint 1
5 maximum alarm relative to setpoint1
6 minimum alarm relative to setpoint 1
with automatic enabling and recompute
7 maximum allarm relative to setpoint 1
EC 4-432E 3/95
with automatic enabling and recompute
3
Tel 39 437/852468 (3 linee r.a.) - FAX 39 437/83648
SIZE AND PIERCING TEMPLATE
MOUNTING
- With U-bracket .
The panel thickness will be
between 1 and 5 mm.
ELECTRICAL CONNECTIONS Example of typical application
ELECTRO-MECHANICAL CHARACTERISTICS
Box: Self-extinguishing plastic (PPO) according to UL94
V-0.
Size: 48 x 48 x 100 mm.
Mounting : Panel-mounting through U-bracket.
Environment temperature: from 0 to + 60°C.
Humidity : 10...90% not condensing.
Connections : extractable screw connectors.
Insulation-class : II (only with ac power-supply).
Power-supply : 230 Vac (standard); on request 115 Vac
50/60 Hz 2VA; 12-24Vac/dc 1,5 W.
Inputs for measure: 1 configurable for transducers with
current output (4-20 mA or 0-20 mA).
Input resistance: 56 ohm.
4
EVERY CONTROL srl - Via Mezzaterra 6 - 32036 Sedico - BELLUNO - ITALY
Transducer power-supply : available at terminal 15
(voltage 12V +30%, -20%).
Range of measure: from zero to 100% of relative
humidity.
Resolution: 0.1%rH.
Setpoint adjustement: possible in the entire range
of measure.
Display: 3 digits display, outputs-status indicator.
Outputs: 2 SPDT 8A/250V (K1 and K2) relays.
EC 4-432E 3/95
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