Stahl 9482/32 Series, Operating Instructions Manual, Page: 49 / 73

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2018-07-03·BA00·III·en·02
Engineering
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Temperature Input Module Zone 1
Series 9482/32
The signal inputs are galvanically connected with each other. Since they are designed as
differential inputs, they prevent the generation of earth loops for earthed thermocouples.
Connection example
Up to 8 thermocouples or mV transmitters as well as resistance temperature detectors
and an external reference junction are connected.
A mixture of different signals is possible, for example:
• Thermocouples or mV sources on channels 0, 2, 6, and 7
• Resistance temperature detectors or potentiometers on channel 1, 3 and 5
• External reference junction on channel 6 and 7
6.2 Proof of Intrinsic Safety
To verify the intrinsic safety, the safety data according to the sensor, sensor combination
and circuitry used are displayed. For all sensors used, the safety data of the sensor
circuitry indicated below must be taken into account: the module supports the different
temperature sensors (resistance temperature detectors, resistance transmitters,
thermocouples and mV transmitters) with pure or mixed circuitry. Depending on the
circuitry, the safety data for the respective measurement channel may vary.
The flow chart will help you select the correct safety data.
Optionally, non-used channels with resistors (single electrical equipment for
intrinsically safe circuits according to EN 60079-11) can be equipped in order
to suppress the error messages of the respective channels.
(Resistors are available as accessories!)
RTD and potentiometer with thermocouples and mV transmitters with external CJC
16497E00
Chan-
nel
Thermocouple /
mV sensor
2-wire RTD 3-wire RTD External 3-wire CJC /
3-wire RTD
0 2 (V+), 3 (V-) – – –
1 6 (V+), 7 (V-) – – –
2 – – 9 (I+), 11 (V-), 12 (I-) –
3 – 13 (I+), 16 (I-) – –
4 – – – 17 (I+), 18 (V+), 19 (V-),
20 (I-)
5 – – – 21 (I+), 22 (V+), 23 (V-),
24 (I-)
6 26 (V+), 27 (V-) – – 25 (I+), 29 (I+), 32 (I-)
7 30 (V+), 31 (V-) – –
The safety data of the connection example are determined depending on the
combination of connection I!