4-channel thermocouple input terminal, high-precision, with open-circuit recognition, with calibration certificate EL3314-0020
Error LED 4
Error LED 3
Error LED 2
Error LED 1
Run LED 
Run LED 
Run LED 
Run LED 
+TC1
+TC2
+TC3
+TC4
-TC1
-TC2
-TC3
-TC4
Top view 
Contact assembly 
Observe for earthed
thermocoupler:
differential inputs
max. ± 2 V to ground
extended shock and vibration range
calibration certificate

EL3314-0020 | 4-channel thermocouple input terminal, high-precision, with open-circuit recognition, with calibration certificate

The EL3314-0020 analog input terminal allows four thermocouples to be connected directly. The EtherCAT Terminal circuit can operate thermocouple sensors using the 2-wire technique. A microprocessor handles linearisation across the whole temperature range, which is freely selectable. The error LEDs indicate a broken wire. Compensation for the cold junction is made through an internal high-precision temperature measurement at the terminal. The EL3314-0020 can also be used for mV measurement.

The calibration certificate for the respective serial number can be downloaded from www.beckhoff.com/certificates.

Technical data EL3314-0020
Number of inputs 4
Power supply via the E-bus
Thermocouple sensor types types K, J, L, E, T, N, U, B, R, S, C (default setting type K), mV measurement
Distributed clocks
Input filter limit frequency typ. 1 kHz; depending on sensor length, conversion time, sensor type
Connection method 2-wire
Wiring fail indication yes
Conversion time approx. 2.5 s up to 20 ms, depending on configuration and filter setting, default: approx. 250 ms
Voltage measurement ±78 mV (error: ±25 µV)
Temperature range in the range defined in each case for the sensor (default setting: type K; -270…+1,370 °C); voltage measurement: ±78 mV in 10 nV resolution
Resolution 24 bit, presentation adjustable: 0.1/0.01/0.001 °C per digit or 10 nV per digit
Measuring error @ 50 Hz filter, @ 25 °C ambient temperature:
type B: ±5.0 °C; type E: ±1.8 °C; type J: ±1.8 °C; type K: ±1.8 °C; type L: ±1.8 °C; type N: ±2.5 °C; type R: ±4.0 °C; type S: ±4.0 °C; type T: ±1.8 °C; type U: ±1.8 °C; type C: ±3.5 °C
Calibration certificate yes
Electrical isolation 500 V (E-bus/signal voltage)
Current consumption power contacts
Current consumption E-bus typ. 200 mA
Special features open-circuit recognition, with calibration certificate
Weight approx. 60 g
Operating/storage temperature 0…+55 °C/-25…+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
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Product announcement
on request, estimated market release 2017