Resistor bridge
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Measurement deviation due to incorrect shield connection If you are using a shielded cable, grounding the cable shield at the sensor end can lead to measurement deviations.
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The EP3356-0022 enables the connection of a resistor bridge or load cell in 4-wire technique.
Connect the cable shield to pin 5 of the M12 connector.
The four M12 sockets of the EP3356-0022 are internally connected to one another. Therefore, you can connect a resistor bridge to any M12 socket.
You can also connect several resistor bridges in parallel, see chapter Parallel connection of strain gauges.
The voltage Uref is 10 V and is generated in the EP3356-0022 from UP.
Meaning of the LEDs
LED | Color | Meaning | |
|---|---|---|---|
RUN | green | This LED indicates the operating state of the EtherCAT Box: | |
off | State of the EtherCAT State Machine: INIT = initialization of the EtherCAT Box. | ||
flashing | State of the EtherCAT State Machine: PREOP = function of the mailbox communication and different default settings set. | ||
single flash | State of the EtherCAT State Machine: SAFEOP = verification of the Sync Manager channels and the distributed clocks. Outputs remain in safe state. | ||
on | State of the EtherCAT State Machine: OP = normal operating state; mailbox and process data communication is possible. | ||
flickering | State of the EtherCAT State Machine: BOOTSTRAP = function for Firmware updates of the EtherCAT Box. | ||
Stdy | green | on | The measured value is stable |
off | The measured value is not stable | ||
Msr | green | on | Measurement active (process data are valid) |
off |
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S-Cal | green | on | Self-calibration active
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S-Test | green | on | Self-test active
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ErrD | red | on | Channel 1 (strain gauge differential signal) outside the valid value range. |
ErrR | red | on | Channel 2 (strain gauge reference signal) outside the valid value range. Possible reasons:
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