VICI SVI - Manual (Page 6)

2
Installation
The Serial Valve Interface can be easily installed by the user with the
following items as supplied with the SVI:
• One wall-mount power supply
• One RS-232 cable, to interface the SVI to any PC/AT compatible serial
communications port with a DB-9 connector
• One two-position interface cable for connecting up to four two-position
electric actuators or Digital Valve Interfaces for use with air actuators
• Two 20-pin IDC connectors, to adapt the external interface cables supplied
with Valco multiposition electric actuators for use with the SVI
• One CD with Vcom software.
NOTE: The jumpers referred to several times in the installation instructions
are small plastic connectors on the circuit boards which can be easily pulled
off and reinstalled on different pins.
SVI Setup
The SVI can operate in one of two different modes, determined by the
position of the jumper on connector CO14 on the SVI main board during
power up. In the Option 1 position (the factory setting) the Single Device
Mode is selected; in the Option 2 position, the Multiple Device Mode is
selected. See Drawing 22110, page 14 for a complete list of the SVI jumper
options and the factory settings.
Single Device Mode
The single device mode, which is the factory-preset mode, requires a
dedicated Serial Communications Port on the host computer for each SVI.
Three optional baud rates can be selected by jumpers on the SVI main
board, with a factory setting of 9600 baud. See Drawing 22110, page 14.
Multiple Device Mode
The multiple device mode allows up to eight SVIs to be daisy-chained from a
single serial communications port on the host computer. (Figure 1) In this
mode the SVI has a fixed 9600 baud rate. Connector CO11 on the SVI main
board selects an ID of 0 to 7 which is used to distinguish each device. (Each
SVI in the daisy chain must have a different ID.) The communications board
connector CO14 jumper must be changed to the PASS THRU position for all
SVIs on the daisy chain except for the last device, which should be set to
the END MODULE position to properly terminate the daisy-chain. See
Drawing 22110, page 14 for a complete list of the SVI jumper options.
Valco Instruments Co. Inc.
Serial Valve Interface
Power supply
RS-232 cable
Two position
interface cable
20-pin IDC
connector
Software CD