EVCO EC4432 - Manual

1
EC 4-432E 3/95
DIGITAL HUMIDITY
CONTROLLER
with two outputs
EC 4-432
GENERAL CHARACTERISTICS
* 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
* 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 4-432, 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.