4-channel analog input terminal RTD, 2-wire connection, 16 bit, Ex i ELX3204
Error LED 4
Error LED 3
Error LED 2
Error LED 1
Run LED 
Power contact
+24 V EX
Power contact
0 V EX
Top view 
extended temperature range

ELX3204 | 4-channel analog input terminal RTD, 2-wire connection, 16 bit, Ex i

ExThe ELX3204 analog input terminal allows the direct connection of RTDs located in hazardous areas classified Zone 0/20 or 1/21. The circuitry of the ELX3204 can operate sensors with 2-wire technology. Linearisation is carried out over the entire freely selectable temperature range. By default the terminal is set to PT100 sensors with 2-wire technology. The ELX3204 terminal indicates signal state and sensor malfunctions (e.g. wire breakage) by means of LEDs.

Technical data ELX3204
Technology temperature measurement
Sensor types PT100, PT200, PT500, PT1000, Ni100, Ni120, Ni1000 resistance measurement (10 Ω…4 kΩ), KT(Y) sensors
Number of inputs 4 (differential)
Connection method 2-wire
Temperature range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors), for further types and details see documentation
Resolution 0.1 °C per digit
Measuring current < 1 mA (depending on sensor and measuring range)
Measuring error < ±0.3 % (relative to full scale value)
Internal resistance typ. ≥ 10 kΩ (differential)
Input filter limit frequency typ. 1 kHz
Conversion time 10…3300 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, connection method freely configurable
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, ATEX, IECEx
Ex-Marking II 3(1)G Ex ec [ia Ga] IIC T4 Gc
II (1)D [Ex ia Da] IIIC
I (M1) [Ex ia Ma] I
Ex ec [ia Ga] IIC T4 Gc
[Ex ia Da] IIIC
[Ex ia Ma] I
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