VICI SVI - Manual (Page 8)

4
Installation
Electric Actuator Connections
Standard Two Position Electric Actuators
To connect the SVI to a two position standard electric actuator, use the two
position interface cable. Plug one end of this cable into the connector on the
top of the SVI which is labeled V1 V2 V3 V4. The other end of the cable has
four Molex connectors which are addressed by the SVI as V1 through V4.
These Molex connectors plug directly into the remote switching cable on the
back of Valco’s standard two position electric actuators.
Any Valco two position standard electric actuator with a serial number above
19000 allows the option of positive dual-position feedback to the SVI.
To enable this feature:
1. Unplug the actuator. Use a pair of pliers to compress and remove the
cable strain relief devices from the back of the actuator cover. Remove
them from the cables to allow the cables to travel freely through the holes
in the cover.
2. Remove the four phillips screws which secure the actuator cover.
(One must be accessed through a hole in the black mounting bracket)
3. Slide the cover back far enough to allow access to the small dipswitch
on the board next to the connectors for the manual switching cable, and
change the position of the switch.
4. Put the cover back in position, replace the four screws, and reinstall the
strain relief devices.
In this mode, the clear wire carries a logic high when the actuator is in
Position A (LOAD): the white wire carries a high when it’s in Position B
(INJECT).
Microelectric Two Position Actuators
Microelectric two position actuators have a built-in serial port, and
therefore do not require the SVI for serial port control. However, they
can be connected to an SVI if you are upgrading a system from standard
electric actuators and don’t want to change the existing SVI software.
Cable I-23196 adapts any of the Molex connectors (V1 through V4) on
cable I-22041 to the digital input port on a two position microelectric actuator.
If only two position microelectric actuators are to be used, then optional
cable I-23783, which provides four direct connections to the SVI, can be
substituted for cable I-22041.
Standard Multiposition Electric Actuators
Each standard multiposition electric actuator is shipped with an external
interface cable. This cable has an IDC 20-wire connector on one end, with
the other end unfinished to allow user-selected termination. To connect the
multiposition actuator to the SVI, install an IDC 20-wire connector on the
unfinished end. Plug one end of the cable into the multiposition electric
actuator and the other end into the connector on the SVI labeled either V5
or V6. Two multiposition valves may be used simultaneously.