8-channel input terminal PT100 (RTD) EL3208
Run LED
Err LED
CH1...8
Power contact
+24 V
Power contact 0 V
+R1 
+R2 
+R3 
+R4 
+R5 
+R6 
+R7 
+R8 
-R1
-R2
-R3
-R4
-R5
-R6
-R7
-R8
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range

EL3208 | 8-channel input terminal PT100 (RTD)

The EL3208 analog input terminal allows eight resistance sensors to be connected directly. The EtherCAT Terminal circuit can operate sensors using the 2-wire technique in a compact 12 mm housing. A microprocessor handles linearisation across the whole temperature range, which is freely selectable. The EtherCAT Terminal’s standard settings are: resolution 0.1 °C. Sensor malfunctions such as broken wires are indicated by error LEDs.

Technical data EL3208
Number of inputs 8
Power supply via the E-bus
Technology 2-wire
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
Conversion time approx. 170 ms default setting, 3…1600 ms configurable
Measuring current < 0.5 mA (load-dependent)
Measuring range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Temperature range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Resolution 0.1 °C per digit
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. 140 mA
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
Approvals CE, UL