User guide

342 Advanced User Guide
11 Valves
There is no direct relationship between the location of a valve in
the valve box and the driver that controls it. This depends on
how the solenoids are wired and the actuators are plumbed.
Manual valves must be switch by hand, and are heated or
unheated.
The external valve drivers
Valve drivers 5 and 6 control a current that may be used to drive
a relay or other low- power device. Valve drivers 7 and 8 switch
a current from an external source. Electrical details are in
Table 76 on page 341.
These drivers, particularly Valve 7 and 8, may be used to control
a motor driven multiposition valve for stream selection.
All four of these drivers appear on the External Event
connector on the back of the GC.
Internal valve drivers
(1 through 4)
Keyboard
Run table
Clock table
or
or
Connector V1
Connector V2
Connector V3
Connector V4
Keyboard
Run table
Clock table
or
or
External valve drivers
(5 through 8)
Valve 5 (pin 1) and
ground (pin 3 or 4)
Valve 6 (pin 2) and
ground (pin 3 or 4)
Valve 7 (pin 5
and pin 6)
Valve 8 (pin 7
and pin 8)