Code +030220811- rel. 1.0 – 26.04.2007
16
6. Electronic valve control devices
There are different types of driver and different controllers with built-in drivers.
6.1 Drivers
The drivers (EVD family) mainly differ as regards:
• type of pressure transducer (ratiometric or 4-20 mA)
• user interface for programming the parameters
• local network connection (tLAN, pLAN, RS485 supervisor).
A pLAN or tLAN connection is fundamental if the driver needs to be used together with a programmable pCO
controller that manages the refrigerating showcase/air-conditioner. This gives optimum results both as concerns the
programming interface (this can be customised), the operation of the driver, based on the needs of the unit, and
the sharing and management of probes, alarms and signals.
If not compatible with the pLAN or tLAN, the driver must operate in stand-alone mode, activating and deactivating
control of the valve based on the status of the digital input:
• digital input open
: the driver closes the valve and deactivates control
• digital input closed
: the driver opens the valve and starts control
In some models, positioner operating mode can be activated, in which the driver moves the valve exclusively based
on an analogue input signal (4-20 mA or 0-10 V, corresponding linearly to 0 % and 100 % opening). When the
driver works in this mode, control of the valve and all the alarms are disabled.
Model EVD200 EVD300 EVD400 tLAN EVD400 pLAN EVD400 RS485
Code EVD0000200 EVD0000300 EVD0000400/430 EVD0000410/440 EVD0000420/450
Software user
interface
pCO controller
via pLAN
PC with
PlantVisor
PC with EVD4_UI;
pCO or µC via
tLAN
PC with EVD4_UI;
pCO via pLAN
PC with EVD4_UI
or PlantVisor
Hardware user
interface
5 signal LEDs 5 signal LEDs NO NO NO
Connectable to
supervisor
NO YES NO NO YES
Connectable in
pLAN
YES NO NO YES NO
Control activation
From pLAN
(pCO)
From digital
input
From tLAN (pCO,
µC²)
From pLAN (pCO) From digital input
Type of pressure
transducer
4 to 20 mA 4 to 20 mA Ratiometric Ratiometric Ratiometric
Type of terminals Fixed screw Fixed screw Plug-in Minifit Plug-in Minifit Plug-in Minifit
Network address
setting
Hardware with
microswitches
Hardware
with
microswitches
Software with
EVD4_UI; Key
EVDKEY0001
Software with
EVD4_UI; Key
EVDKEY0001
Software with
EVD4_UI; Key
EVDKEY0001
Range of network
addresses
1 to 31 1 to 31 1 to 200 1 to 32 1 to 200
Control as
positioner
NO 4 to 20 mA 4-20 mA or 0-10 V 4-20 mA or 0-10 V 4-20 mA or 0-10 V
Battery module EVBAT00100 EVBAT00100 EVBAT00300 EVBAT00300 EVBAT00300
Tab. 6.a
Models EVD0000400, EVD0000410, EVD0000420 can be configured to control different types of valves with stepper
motor (CAREL, Sporlan, Alco, Danfoss).
Models EVD0000430, EVD0000440, EVD0000450 on the other hand are pre-configured for CAREL valves only.
All models of EVD400 are available in multiple packages (10 pcs), code EVD00004*1.
Finally, it should be noted that for applications with lower cooling capacities, the use of an on-off solenoid valve
is recommended, rather than the battery module, considering the lower cost of the valves compared to the
batteries.
control
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