Agilent Technologies 7890 Series User Manual

218 Advanced Operation Manual
6 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 55 on page 217.
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)

Agilent Technologies 7890 Series Specifications

General

Brand	Agilent Technologies
Model	7890 Series
Category	Laboratory Equipment
Language	English