INFICON Ecotec E3000 Multigas-Sniffer-Leak Detector Interface description - Manual (Page 9)

2 I/O Port
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Gas select, gas a, gas b Through the control inputs Gas … (pin 9, 13 and 25) it is possible to select a gas loaded in
the active gas memory (one gas out of four). The Ecotec E3000 will then operate in the
single gas mode.
With an edge triggered signal from LOW to HIGH at Pin 25, the selected gas at Pin 13 and
9 becomes valid.
2.1.2 PLC outputs
Technical data open
collector outputs
Open collector output

Active = low
Example: Open collector output „Error“.
Fig. 2: Circuit for open collector output “Error”
Table 2: Gas select
Pin 25 Pin 13 Pin 9 Function
0 X X Gas selecting disabled
1 0 0 1
st
gas is selected
1 0 1 2
nd
gas is selected
1 1 0 3
rd
gas is selected
1 1 1 4
th
gas is selected
Material damage if voltage or current are too high.
Wrong voltage or current can destroy the unit.
► Pay attention to the technical data of the open collector outputs: Permissible max.
voltage and current for open collector outputs are: 28 V; 50 mA.
6
17
24 V
I/O Port (open collector output)
Error active = 0 Volt
Error inactive = 24 Volt
10 K 