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Home>Products>BECKHOFF

BECKHOFF EL3311 | 1-channel thermocouple input terminal
BECKHOFF EL3311 | 1-channel thermocouple input terminal
Describe

EL3311 | 1-channel thermocouple input terminal with open-circuit recognition

 
 3

The EL3311 analog input terminal allows thermocouples to be connected directly. The EtherCAT Terminal's circuit can operate thermocouple sensors using the 2-wire technique. Linearisation over the full temperature range is realised with the aid of a microprocessor. The temperature range can be selected freely. The error LEDs indicate a broken wire. Compensation for the cold junction is made through an internal temperature measurement at the terminal. The EL3311 can also be used for mV measurement.


Technical data EL3311
Number of inputs 1
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
Signal type differential
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. 750 ms up to 20 ms, depending on configuration and filter setting, default: approx. 75 ms
Voltage measurement ±30 mV…±75 mV
Temperature range in the range defined in each case for the sensor (default setting: type K; -200…+1370 °C); voltage measurement: ±30 mV…±75 mV
Resolution 0.1 °C per digit
Measuring error < ±0.3 % (relative to full scale value)
Electrical isolation 500 V (E-bus/signal voltage)
Current consumption power contacts
Current consumption E-bus 200 mA
Bit width in the process image 1 x 32 bit TC input, 1 x 16 bit TC output
Special features open-circuit recognition
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/markings CE, UL, ATEX
Ex marking II 3 G Ex nA IIC T4 Gc