2-channel analog input terminal thermocouple/mV measurement, 2-wire connection, 16 bit, Ex i ELX3312
Error LED 2
Error LED 1
Run LED 
Power contact
+24 V EX
Power contact
0 V EX
+TC1
+TC2
-TC1
-TC2
Top view 
extended temperature range

ELX3312 | 2-channel analog input terminal thermocouple/mV measurement, 2-wire connection, 16 bit, Ex i

ExThe ELX3312 analog input terminals allows the direct connection of thermocouples located in hazardous areas classified Zone 0/20 or 1/21. The circuitry of the ELX3312 can operate sensors with 2-wire technology. Linearisation is possible over the entire freely selectable temperature range. The error LEDs indicate a broken wire. Compensation for the cold junction is achieved through internal temperature measurement. Millivolt measurement is also possible with ELX3312.

Technical data ELX3312
Technology temperature measurement
Sensor types thermocouples type K, J, L, E, T, N, U, B, R, S, C (default: type K)
Number of inputs 2 (differential)
Connection method 2-wire
Measuring range depending on sensor type, type K -270…+1370 °C, voltage measurement: ±30…±75 mV, for further types and details see documentation
Resolution 0.1 °C per digit
Measuring error < ±0.3 % (relative to full scale value)
Internal resistance typ. ≥ 10 kΩ (differential)
Input filter limit frequency typ. 1 kHz; depending on sensor length, conversion time, sensor type
Conversion time 10…5000 ms (adjustable, default: 270 ms)
Supply voltage electronics 24 V DC (via power contacts), ELX9560 power supply
Current consumption power contacts typ. 10 mA
Current consumption E-bus typ. 70 mA
Special features limit value monitoring, digital filter and characteristic curve linearisation integrated
Weight approx. 60 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/see documentation
Approvals/markings CE, UL, ATEX, IECEx, cFMus
Ex-Marking ATEX:
  II 3(1)G Ex ec [ia Ga] IIC T4 Gc
  II (1)D [Ex ia Da] IIIC
  I (M1) [Ex ia Ma] I
IECEx:
  Ex ec [ia Ga] IIC T4 Gc
  [Ex ia Da] IIIC
  [Ex ia Ma] I
cFMus:
  AIS Class I, II, III, Division 1, Groups A thru G
  Class I, Division 2, Groups A, B, C, D
  Class I, Zone 2, AEx nA [ia Ga] IIC T4 Gc
  Class I, Zone 2, AEx ec [ia Ga] IIC T4 Gc
  [AEx ia Da] IIIC T4
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