VICI SVI - Manual (Page 10)

6
Installation
CAUTION: When the SVI Valve 1 output is jumpered for
12 VDC output, remove the plastic Molex connector
from the SVI cable to insure that damage will not result
from an accidental connection to a Valco two position
electric actuator or DVI.
Before using the valve outputs to drive any load in excess of 12 VDC, the
jumper on connector CO13 must be changed to the OFF position. This
effectively removes the internal 12 volt diode clamp on the two position
valve outputs, and requires the installation of external reverse diode clamp-
ing on all inductive loads driven by these outputs.
The two position valve outputs have a jumper-setable option which allows
for the output signal to be continous or to be de-asserted following an
actuation command. When this “timeout” is enabled the signal is asserted
for 150 milliseconds, unless the valve is configured to require feedback. In
that case, the signal will assert until the feedback is received, to a maximum
of four seconds. After four seconds, a positioning error will be indicated.
The SVI as received from the factory has all the outputs set for the timeout
option. If a valve output is to be used to control something other than a
Valco actuator, it may be desireable to disable the timeout function by
arranging the jumpers as indicated in Drawing 22110, page 14.
CAUTION: All outputs from the SVI are internally refer-
enced to a common ground; therefore, all external loads
should be electrically isolated from high voltage power
sources for maximum personal safety and proper equip-
ment operation and protection.