Digital multimeter terminal, with calibration certificate EL3681-0020
Term. Error
Run LED 
10 A
1 A
Top view 
Contact assembly 
factory calibration certificate

EL3681-0020 | Digital multimeter terminal, with calibration certificate

The EL3681-0020 EtherCAT Terminal enables measurement of currents and voltages in a wide input range. The measuring ranges are switched automatically, as usual in advanced digital multimeters. For current measurements, two current paths are available, one of which is a high-current path for up to 10 A. The current and the voltage measurement facility can be used for DC and AC. The alternating parameters are output as true RMS values. The measurement readings can be read and processed with EtherCAT. At the same time, the EL3681-0020 enables the measuring type and range to be set via the bus.

Excellent interference immunity is achieved through the fully electrically isolated design of the electronic measuring system and the dual-slope conversion system. High precision and simple, high-impedance measurement from 300 mV to 300 V allow the EtherCAT Terminal to be used like a modern digital multimeter.

In measuring applications in particular, the voltage to be expected is often not yet known during the planning phase. Automatic adjustment of the measurement range simplifies use and reduces stock levels. The selected measuring type and overload are indicated by LEDs.

The calibration certificate for the respective serial number can be downloaded from

Technical data EL3681-0020
Number of inputs 1 voltage or 1 current (10 A/1 A)
Technology digital multimeter with automatic range selection
Signal voltage max. 300 V AC/DC, 10 A
Distributed clocks
Internal resistance 3 mΩ/0.2 Ω/12.5 MΩ
Resolution 18 bit + sign in each measurement range
Conversion time 0.5 s (1 s during measuring range switching) preset, min. 65 ms
Measured values current, voltage
Measuring voltage 300 mV, 3 V, 30 V, 300 V
Measuring current 100 mA, 1 A and 10 A via high current path
Measuring error 0.01 % DC voltage measurement at 40 °C
Measuring procedure DC with arithmetic averaging, AC with true RMS value calculation
Calibration certificate yes
Update time 0.5 s, 1 s for measuring range selection
Electrical isolation 1500 V (E-bus/field potential)
Current consumption power contacts
Current consumption E-bus 150 mA
Bit width in the process image 32 bit data, 16 bit control/status
Special features automatic or manual range selection, 1.25 A fuse installed + spare fuse, filter deactivatable, with calibration certificate
Weight approx. 70 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
Protect. class/installation pos. IP 20/variable
Approvals/markings CE
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Product announcement
on request, estimated market release 2020, alternative product: EL3751-0020