Connection and LEDs

WARNING

Risk of injury through electric shock and damage to the device!

Bring the bus terminal system into a safe, de-energized state before beginning to mount, disassemble, or wire the bus terminals!

Connection and LEDs 1:
Fig.7: ED3078 – Connection

Connection

Terminal point

Description

Internally connected with connection

Max. current carrying capacity *)

Abbreviation

No.

Ch1U

1

Channel 1, voltage measurement, positive input

–

Not applicable (voltage inputs)

Ch2U

2

Channel 2, voltage measurement, positive input

–

Ch3U

3

Channel 3, voltage measurement, positive input

–

Ch4U

4

Channel 4, voltage measurement, positive input

–

Ch5U

5

Channel 5, voltage measurement, positive input

–

Ch6U

6

Channel 6, voltage measurement, positive input

–

Ch7U

7

Channel 7, voltage measurement, positive input

–

Ch8U

8

Channel 8, voltage measurement, positive input

–

Ch1I

9

Channel 1, current measurement, input

–

50 mA (see note “Overcurrent protection of the 20 mA inputs”)

Ch2I

10

Channel 2, current measurement, input

–

Ch3I

11

Channel 3, current measurement, input

–

Ch4I

12

Channel 4, current measurement, input

–

Ch5I

13

Channel 5, current measurement, input

–

Ch6I

14

Channel 6, current measurement, input

–

Ch7I

15

Channel 7, current measurement, input

–

Ch8I

16

Channel 8, current measurement, input

–

Notice *) Continuous current; short-term higher currents are to be prevented and can cause thermal overload (damage)

Notice

Cable lengths > 30 m

For cable lengths > 30 m, suitable overvoltage protection (surge protection) must be provided (e g. EL9540-0010) if corresponding interference could affect the signal cable.

Connection and LEDs 2:

Overcurrent protection of the 20 mA inputs

The current inputs are protected against damage due to overcurrent by an internal electronic overcurrent detection with self-resetting current path separation.

The overcurrent is caused by an occasionally excessive sensor voltage. Depending on the duration and level of the voltage applied, currents > 200 mA can also occur briefly (tripping time: µs range) until the current path separation becomes effective.

Approximately 1 second after an overcurrent detection and the resulting current path separation, the current path is closed again. If the excessive sensor voltage is still present, an overcurrent is detected again and the current path is opened. This process is repeated as long as the excessive voltage is present (auto-retry).

  • To ensure that the current path separation is not overloaded, the dielectric strength in the current measuring range must be observed (see technical data).
  • Overcurrent is indicated in the process image as "Overrange".
  • After it occurs, the error condition must be eliminated immediately.

LEDs

Connection and LEDs 3:
Fig.8: ED3078 – LEDs

Name

No.

Color

Meaning

Run

1

green

This LED indicates the terminal’s operating state:

off

State of the EtherCAT State Machine: INIT = initialization of the terminal

flashing

State of the EtherCAT State Machine: PREOP = function for mailbox communication and different default settings are applied

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 terminal

Error Ch. 1
…
Error Ch 8

9,
…
16

red

off

No error

On

Error is present, corresponds to PDO “Error”