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Serial Valve Interface (SVI)
The serial valve interface (SVI) is a
device that converts commands from
a computer, via a serial port, into
positional control for two position and
selectors (multiposition valves). Each
SVI can control up to four air actuated
(via a DVI, page 199) or electrically
actuated two position valves and two
electrically actuated selectors. The
timing program can be run in the
background, freeing the computer for
other applications. Two serial ports
(one male, one female) allow up to
eight SVIs to be daisy-chained and run
from a single serial communication
port. In addition to controlling valves,
the SVI can be used to control other
devices which require logic level, BCD,
or single line inputs.
The SVI is a self-contained unit,
with its own 110 VAC (or 230 VAC
Eurostandard) power supply. There
is no need to open the computer to
connect the SVI, because its DB-9 to
DB-9 RS-232 cable connects to any
available serial port. It also includes an
interface cable for Valco two position
actuators, and two Ansley 20-wire
connectors for installation on the
interface cable which comes as part
of the multiposition electric actuator.
For air actuated valves, optional
interface cables are available for the
DVI, which converts electrical signals
to pneumatic pulses.
Software is supplied on a Windows-
compatible CD. If different program
functionality is needed, information is
given in the manual which will assist in
writing the necessary software.
SVI
for all air and
Serial valve interface
standard electric actuators
Prod No
110 VAC
SVI
230 VAC
SVI-220
DVI/SVI interface cable
I-22239
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