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 | Connection | 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 | Measurement uncertainty of |
---|---|---|---|---|---|
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 | Feed | Supported nominal | Bridge supply | Distributed Clocks for |
---|---|---|---|---|---|
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 | 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 |
EL3356-0090 | X | - | X | - | Auto-calibration |
EL3751 | - | X | X | Freely parameterizable | - |
ELM3502, ELM3504 | - | X | X | Freely parameterizable | Calibrated version |
ELM3702, ELM3704 | - | X | X | Freely parameterizable | - |
ELM3542, ELM3544 | - | - | X | - | Auto-calibration |
EP3356-0022 | - | - | X | - | - |
EPP3504-0023 | - | X | X | Freely parameterizable | - |
ERP3504-0022 | - | X | X | Freely parameterizable | - |
ELX3351 | - | - | X | - | - |