Strain gauge (SG)

Comparative overview of Beckhoff SG measuring devices (terminals, boxes, modules)

The following table is intended to provide a quick overview of the available Beckhoff I/O devices for the direct connection of ohmic mV/V sensors (strain gauges, scales, vibration sensors).

Notice

Device documentation is solely authoritative

The values may be shortened extracts from the respective documentation, which is decisive and recommended for detailed analysis.

For a possibly more up-to-date overview, please consult www.beckhoff.com.

 

Design

Number of SG
channels

Connection
technology

Resolution

Oversampling

KL3351

K-bus terminal IP20

1

Cage Clamp

16 bit

-

KL3356

K-bus terminal IP20

1

Cage Clamp

16 bit

-

EL3351

EtherCAT terminal IP20

1

Cage Clamp

16 bit

-

EL3356

EtherCAT terminal IP20

1

Cage Clamp

16 bit

-

EL3356-0010

EtherCAT terminal IP20

1

Cage Clamp

24 bit

-

EL3356-0090

EtherCAT terminal IP20

1

Cage Clamp

24 bit

-

EL3751

EtherCAT terminal IP20

1

Cage Clamp

24 bit

X

ELM3502, ELM3504

EtherCAT terminal IP20

2/4

Push-In, LEMO

24 bit

X

ELM3702, ELM3704

EtherCAT terminal IP20

2/4

Push-In

24 bit

X

ELM3542, ELM3544

EtherCAT terminal IP20

2/4

Push-In

24 bit

X

EP3356-0022

EtherCAT Box IP67

1

M12

24 bit

-

EPP3504-0023

EtherCAT P Box IP20

4

Push-In

24 bit

X

ERP3504-0022

EtherCAT P Box IP67

4

M12

24 bit

X

ELX3351

EtherCAT terminal IP20

1

Cage Clamp

24 bit

-

Continuation:

 

Full bridge

Half bridge

Quarter bridge

Maximum sampling rate
per channel for control

Measurement uncertainty of
the FSV in the SG modes 1)

KL3351

X

only with external supplement

only with external supplement

15 sps

< ±0.1 %

KL3356

X

only with external supplement

only with external supplement

250 sps

< ±0.1 %

EL3351

X

only with external supplement

only with external supplement

400 sps

< ±0.1 %

EL3356

X

only with external supplement

only with external supplement

100 sps

< ±0.01 % for the calculated load value 2)

EL3356-0010

X

only with external supplement

only with external supplement

10,000 sps

< ±0.01 % for the calculated load value 2)

EL3356-0090

X

only with external supplement

only with external supplement

10,000 sps

< ±0.01 % for the calculated load value 2)

EL3751

X

X

X

10,000 sps

up to < ±0.05 %

ELM3502, ELM3504

X

X

X

10,000 / 20,000 sps

up to < ±0.0025 %

ELM3702, ELM3704

X

X

X

1,000 sps

up to < ±0.01 %

ELM3542, ELM3544

X

X

X

1,000 sps

up to < ±0.0025 %

EP3356-0022

X

only with external supplement

only with external supplement

15 sps

< ±0.1 %

EPP3504-0023

X

X

X

10,000 sps

up to < ±0.0025 %

ERP3504-0022

X

X

X

10,000 sps

up to < ±0.0025 %

ELX3351

X

only with external supplement

only with external supplement

625 sps

< ±0.5 % for the calculated load value

1) on this point in particular, the additional information in the respective device documentation must be evaluated.
2) remaining linearity uncertainty after costumer made offset and gain adjustment.

Continuation:

 

Bridge
voltage

Feed
voltage

Supported nominal
characteristic values

Bridge supply
integrated

Distributed Clocks for
timestamp operation

KL3351

up to ±16 mV

up to ±10 V

all, conversion must be carried out in the controller / PLC

Yes, 5 V

-

KL3356

up to ±20 mV

up to ±12 V

Adjustable in steps of 1 mV/V

-

­ -

EL3351

up to ±20 mV

up to ±12 V

all, conversion must be carried out in the controller / PLC

Yes, 5 V

-

EL3356

up to ±27 mV

up to ±13.8 V

Adjustable 0.5 to 4 mV/V

-

-

EL3356-0010

up to ±27 mV

up to ±13.8 V

Adjustable 0.5 to 4 mV/V

-

X

EL3356-0090

up to ±27 mV

up to ±13.8 V

Adjustable 0.5 to 4 mV/V

-

X

EL3751

up to ±160 mV

up to ±5 V

32/16 mV/V

Yes, adjustable up to 5 V

X

ELM3502, ELM3504

up to ±160 mV

up to ±5 V

32/8/4/2 mV/V

Yes, adjustable up to 5 V

X

ELM3702, ELM3704

up to ±160 mV

up to ±5 V

32/8/4/2 mV/V

Yes, adjustable up to 12 V

X

ELM3542, ELM3544

up to ±160 mV

up to ±5 V

Adjustable 0.5 to 4 mV/V

Yes, 10 V

X

EP3356-0022

up to ±16 mV

up to ±10 V

all, conversion must be carried out in the controller / PLC

Yes, 10 V

-

EPP3504-0023

up to ±160 mV

up to ±5 V

32/8/4/2 mV/V

Yes, adjustable up to 5 V

X

ERP3504-0022

up to ±160 mV

up to ±5 V

32/8/4/2 mV/V

Yes, adjustable up to 5 V

X

ELX3351

up to ±18  mV

up to ±10 V

Adjustable 0.5 to 4 mV/V

Yes, 10 V

-

Continuation:

 

TwinSAFE SC

Extended
diagnosis

Various predefined internal digital filters

Other digital filters

Special features

KL3351

-

-

X

-

-

KL3356

-

-

X

-

Auto-calibration

EL3351

-

-

X

-

-

EL3356

-

-

X

-

Auto-calibration

EL3356-0010

-

-

X

Dynamic filter

Auto-calibration, various dynamic functions, calibrated version
EL3356‑0030 available

EL3356-0090

X

-

X

-

Auto-calibration

EL3751

-

X

X

Freely parameterizable
with TwinCAT
Filter Designer

-

ELM3502, ELM3504

-

X

X

Freely parameterizable
with TwinCAT
Filter Designer

Calibrated version
ELM350x-0030 available

ELM3702, ELM3704

-

X

X

Freely parameterizable
with TwinCAT
Filter Designer

-

ELM3542, ELM3544

-

-

X

-

Auto-calibration

EP3356-0022

-

-

X

-

-

EPP3504-0023

-

X

X

Freely parameterizable
with TwinCAT
Filter Designer

-

ERP3504-0022

-

X

X

Freely parameterizable
with TwinCAT
Filter Designer

-

ELX3351

-

-

X

-

-