4-channel input terminal PT100 (RTD) for 3-wire connection EL3214
Run LED
Err LED
CH1...4
Power contact
+24 V
Power contact 0 V
+R1 
RL1 
+R2 
RL2 
+R3 
RL3 
+R4 
RL4 
-R1
-R2
-R3
-R4
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range

EL3214 | 4-channel input terminal PT100 (RTD) for 3-wire connection

The EL3214 analog input terminal allows four resistance sensors to be connected directly. The EtherCAT Terminal circuit can operate sensors using the 3-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 EL3214
Number of inputs 4
Power supply via the E-bus
Technology 2-/3-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 (types see documentation)
Connection method 3-wire
Conversion time approx. 170 ms default setting
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, 4 x 3-wire connection
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, variable connection technology
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
Related products  
EL3214-0090 4-channel input terminal PT100 (RTD) for resistance sensors, 16 bit, 3-wire system, TwinSAFE SC