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8
Communications
External I/O
External I/O
Connections between Micro GCs and external devices are made with the appropriate cable to the
External I/O port. The external I/O port can handle six analog inputs (input 0 to 10 Volt).
The user interface receives analog information and translates it into actions to be taken by the
local user interface, events, or data to be shown or stored in the remote user interface. In OpenLAB
EZChrom and OpenLAB ChemStation only status is visible.
Pin 1
Figure 53.
Agilent 990 Micro GC User Manual
DGND
2
3
4
5
6
7
8
AGND
9
10
11
12
13
14
15
16
Reserved
17
+5 V out 500 mA
18
DGND
19
+12 V out 500 mA
20
DGND
21
+15 V out 500 mA
22
AGND
23
–15 V out 500 mA
24
AGND
25
+5 V out 500 mA
26
AGND
27
+12 V out 500 mA
28
29
30
DGND
31
32
33
Not used
34
Not used
35
Not used
36
37
38
39
Not used
40
External connections
EXT Analog IN 1
EXT Analog IN 2
EXT Analog IN 3
EXT Analog IN 4
EXT Analog IN 5
EXT Analog IN 6
RELAY 1 NO
RELAY 2 NO
RELAY 2 COM
START STOP NO
START STOP COM
READY NO
READY COM
Digital IN 1
Digital IN 2
Digital OUT 1
Digital OUT 2
EXT START IN
EXT READY IN
EXT system reset IN
RELAY 1 COM
123
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