Agilent Technologies 8453 Operator's Manual page 165

Table 12
Table 13
Theory of Operation
External Connectors
GPIO Connector
The GPIO port is a TTL Input/Output port which is used to control
accessories like the pumps.
GPIO Connector
Pin Function
1 Out bit 0
2 Out bit 1
3 Out bit 2
4 Out bit 3
5 Out bit 4
6 Out bit 5
7 Out bit 6
8 Out bit 7
If no other accessory is used, the GPIO port can be used to trigger a
measurement from an external device. The trigger lines use the GPIO
connector pins as shown in Table 13.
Trigger Inputs
Pin Function
9 Trigger blank measurement
10 Trigger sample measurement
11 Trigger standard measurement
12 Trigger stop
13 Trigger kinetics measurement
15 Ground
Pin Function
9 In bit 0
10 In bit 1
11 In bit 2
12 In bit 3
13 In bit 4
14 In bit 5
15 DGND
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