VICI SVI - Manual (Page 5)

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General Description
The Valco Serial Valve Interface (SVI) is a device that converts commands
from a computer, via a serial port, into positional control for our two position
and multiposition valve actuators. Each SVI can control up to four air or
electrically actuated two position valves and two electrically actuated
multiposition valves. The SVI has two serial port connections (one male,
one female) which allow daisy-chaining of up to eight SVI’s on 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 packaged unit which includes an external 12 VDC 200 MA wall-
mount 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 on the back of the computer. It also includes an interface cable for
Valco two position actuators, and two 20-pin IDC connectors for installation
on the interface cable which comes as part of the multiposition standard
electric actuator. For air actuated valves, optional interface cables are
available for the Valco Digital Valve Interface (DVI), which converts electrical
signals to pneumatic pulses. (Valco product number I-22239).
While the SVI can be operated by virtually any computer with an RS-232
port, the software supplied with this package is written for PC’s. The SVI is
supplied with Vcom software.