4-channel input terminal PT100 (RTD) EL3204
Error LED 4
Run LED
Error LED2
Run LED
Error LED3 
Run LED 
Error LED1 
Run LED 
Power contact
+24 V
Power contact 0 V
+R1
-R1
+R3
-R3
+R2
-R2
+R4
-R4
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range

EL3204 | 4-channel input terminal PT100 (RTD)

The EL3204 analog input terminal allows resistance sensors to be connected directly. The EtherCAT Terminal circuit can operate sensors using the 2-wire technique. A microprocessor handles linearisation across the whole temperature range, which is freely selectable. The EtherCAT Terminal’s standard settings are: resolution 0.1 °C in the temperature range of PT100 sensors. Sensor malfunctions such as broken wires are indicated by error LEDs.

Technical data EL3204 | ES3204
Number of inputs 4
Power supply via the E-bus
Distributed clocks
Input filter limit frequency typ. 1 kHz
Sensor types PT100, PT200, PT500, PT1000, Ni100, Ni120, Ni1000 resistance measurement (e.g. potentiometer, 10 Ω…1.2/4 kΩ), KTY sensors
Connection method 2-wire
Resolution 0.1 °C per digit
Conversion time approx. 85 ms default setting, 2…800 ms configurable
Temperature range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Measuring current < 0.5 mA (load-dependent)
Measuring error < ±0.5 °C for PT sensors
Electrical isolation 500 V (E-bus/signal voltage)
Current consumption power contacts
Current consumption E-bus typ. 190 mA
Bit width in the process image 4 x 32 bit RTD input
Special features integrated digital filter, limit value monitoring
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/variable
Pluggable wiring for all ESxxxx terminals
Approvals CE, UL, Ex
Special terminals
EL3204-0200 4-channel universal input terminal for RTD up to 240 kΩ, NTC 20 k, 16 bit