Beckhoff ELM3344-0030 | EtherCAT Terminal, 4-channel analog input, temperature

The 4- and 8-channel EtherCAT Terminals from the ELM334x economy

series are designed for temperature measurement with thermocouples.

All common thermocouple types are covered and, with a sampling rate

of 1 ksps per channel, fast processes are also easy to record.

The resolution is adjustable to 0.001°C. The channel properties can be

adjusted individually for each channel via CoE. An exceptionally high

measuring accuracy is achieved through the precise measurement of

the internal cold junction.

In the ELM334x-0000 version, the 6-pin connector (push-in) is

removable for maintenance purposes without loosening the individual

cores. The internal ground for the external connection is also available

on it in order to avoid potential differences between channels.

In addition, the ELM334x can also continuously measure potential

differences in order to detect impairments.

Like all ELM3xxx terminals, the ELM334x devices support the TE1310

TwinCAT 3 Filter Designer for application-oriented filter design and

the typical internal functions of the ELM3xxx for data processing

such as true RMS calculation, drag indicator, etc.

The fed-through power contacts simplify the potential distribution

directly on the DIN rail. To reduce ambient air effects, the

ZS9100-0003 shielding hood, which is available as an accessory, can

be mounted on the terminal.

The individual calibration certificate for each device, in accordance

with ISO 17025 or DAkkS, depending on the device variant, can

be downloaded here. These calibration certificates are issued for

Beckhoff by an accredited service provider. 

The ELM3244-0000 and ELM3246-0000 measure resistances very

precisely in multiple measuring ranges up to 5 kΩ and are thus

suitable e.g. for critical temperature measurements with high

requirements. They can output the resistance value directly or

transform it locally, depending on the set RTD characteristic (e.g.

Pt100/Pt1000), into a temperature that is accurate to < ±0.05°C,

depending on the type.

The Beckhoff RTD measurement capability thus ranges from the

simple EL320x through the precise EL320x 0010 up to the ELM324x.

With a sampling rate of 1 ksps, they are part of the economy line

and are suitable for observing comparatively slow processes that

nevertheless need to be tracked very precisely.

Extensive documentation is available from Beckhoff sales, support

or 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 2-, 4-, 6- or 8-channel ELM314x EtherCAT Terminals in the Economy

line can be set to current or voltage measurement channel by channel,

offering sampling rates of up to 1 ksps per channel.

Analog signals in the ranges from ±1.25 to ±10 V, 0 to 10 V, ±20 mA

or 0/4 to 20 mA can be processed. The settings for U or I measurement

mode and the desired measuring ranges can be selected via the control

system and TwinCAT in the CoE interface. Here it is also possible to

select the extensive diagnostics features for unattended long-term use.

The 2-, 4- or 6-pin push-in connectors can be removed for maintenance

purposes; they enable a direct supply of connected sensors.

The EL3453 EtherCAT power measurement terminal has voltage

inputs for direct monitoring of high-capacity generators up to max.

690 V AC, as is common in the wind industry, for example.

No upstream voltage transformer is required. The four current

inputs are electrically isolated so that the terminal can be used

in all common grounded current transformer configurations such

as 2- or 3-transformer configurations with star or delta connectionz

incl. neutral conductor current measurement.

The EL3453 can be used for simple grid analysis up to the 63rd

harmonics analysis.

Alternatively, all readings can be combined in a power quality factor

for simplified diagnostics. Like all measured terminal data, the

harmonic content can be read via the process data.