Ntron SIL O2, User'S Operation Manual, Page: 11 / 56

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2.3 Electrical and Interface Connections
2.3.1 Sensor Input and Customer Interface Wiring
The Ntron ATEX Sensor selected for use with the SIL O2 Analyser as listed in the Installation section
previously, has intrinisically safe parameter values which match the Isolation Barrier output which is built into
the SIL O2 Analyser. The Sensor connects to the Blue terminals as shown below.
The dark Grey terminals are for safe (Non-Ex area) customer interface connections. See the configuration
section on the following page.
13 14 15 16
+ve -ve
Customer Clean
Earth
O2 Sensor
1 2 3 4
+ - 24 VDC
Relay 1
To customer Circuit
5 6 7 8
Relay 2 Transistor(DO)
To customer Circuit
9 10 11 12
Relay 3 4-20mA (AO)
To customer Circuits