Beckhoff ELM3002-0235 | EtherCAT Terminal, 2-channel analog input, voltage

The ELM3002-0225 EtherCAT Terminal of the basic series is designed

for high-voltage measurement on batteries and generators and

supports the measuring ranges ±60/360/600 and 1200 V.

The measuring range is selected in the CoE, as are the other setting

options such as the filter parameters. Irrespective of the signal

configuration, all ELM modules have the same technological properties.

The ELM3002-0225 with oversampling offers a maximum sampling rate

of 50.000 samples per second. The terminal is equipped with 4 mm lab

jacks.

The individual Beckhoff factory calibration certificate can be downloaded

via Beckhoff Service.

Extensive documentation is available from Beckhoff sales, support or

here for each device. Recalibration (ZS9001) is possible 

measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient implementation

of complex system-integrated data acquisition systems (DAQ) that place

high demands on measurement accuracy and time synchronization.

The EL3783 EtherCAT Terminal is a power monitoring I/O terminal

 used for state monitoring of a 3-phase AC voltage system.

For each phase, voltage up to 400/690 Vrms and current up to 1

Arms/5 Arms are sampled as instantaneous values with a resolution

of 16 bits. The six channels are measured simultaneously based on

the EtherCAT oversampling principle with a temporal resolution of

up to 50 µs and then passed on to the control system.

With the processing power available there and in combination with

the TwinCAT Function TF3650. true RMS or power calculations as

well as complex user-specific algorithms can be calculated via the

voltage and current characteristics. Through the oversampling

principle, the terminal is able to measure at significantly shorter 

intervals than the cycle time of the control system.

AC and DC parameters must be connected and measured with a

common reference potential.

Through the feature “ExtendedRange”, the user has the full technical

measuring range available at up to 130% of the specified nominal

measuring range. The EL3783 supports distributed clocks and can

therefore measure synchronously with other EtherCAT devices.

In combination with EL6688 it can be synchronized via IEEE 1588 to

external clocks. The terminal can also be operated without distributed

clocks.

The EL3751 analog input terminal is part of the new generation of analog

EtherCAT measurement terminals. The nominal measuring range of the

input channel can be comprehensively parameterized, both electrically

and on the software side:

• voltage measurement: ±5 mV to ±30 V (incl. ±10 V), 0…10 V, 0…5 V

• current measurement: ±20 mA, 4…20 mA, 0…20 mA, NAMUR NE43

• resistance measurement: 0…5 kΩ

• electrical resistance R in 2-/3-/4-wire connection

• RTD measurement in 2-/3-/4-wire connection

• strain gauge/load cell: ¼ bridge (350 Ω + 120 Ω), ½ bridge (±16 mV/V)

and full bridge (±32 mV/V) with integrated supply in 2-/3-/4-/5-/6-wire

connection

• potentiometer: min. 1 kΩ