1-channel analog input terminal 4…20 mA, differential input, 24 bit, with calibration certificate EL3621-0020
Error LED 1 
Run LED 1 
Power contact
+24 V
Power contact 0 V
+Input 1
-Input 1
Top view 
Contact assembly 
extended temperature
calibration certificate

EL3621-0020 | 1-channel analog input terminal 4…20 mA, differential input, 24 bit, with calibration certificate

The EL3621-0020 analog input terminal handles signals in the range between 4 and 20 mA. The voltage is digitised to a resolution of 24 bit and is transmitted, electrically isolated, to the higher-level automation device. The terminal has a differential input. The signal state of the EtherCAT Terminal is indicated by light emitting diodes.

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

Technical data EL3621-0020
Number of inputs 1 (differential)
Power supply via the E-bus
Technology differential input
Signal current 4…20 mA
Distributed clocks
Internal resistance 85 Ω typ. + diode voltage
Input filter limit frequency 3 kHz
Common-mode voltage UCM 10 V max.
Resolution 24 bit (incl. sign)
Conversion time 1…400 ms configurable
Input signal bandwidth see input filter
Measuring error < ±0.01 % at 25 °C (relative to full scale value, 50 Hz filter)
Electrical isolation 500 V (E-bus/signal voltage)
Current consumption power contacts
Current consumption E-bus typ. 190 mA
Crosstalk attenuation > 60 dB
Special features various filter times, limit evaluation, high precision, with calibration certificate
Weight approx. 60 g
Operating/storage temperature 0…+55 °C/-25…+85 °C (-25…+60 °C/-40…+85 °C in preparation)
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
Services and further information  
ZS9001-EL3621-0020 recalibration service for EL3621-0020: check, compensation, recalibration
ZS9001 recalibration of I/O components with calibration certificate, includes check, compensation, recalibration, package price depending on terminal series
ELxxxx-0020 EtherCAT Terminals with calibration certificate