EL3021 - Connection, display and diagnostics

EL3021 - Connection, display and diagnostics 1:Fig.21: EL3021 - Connection

EL3021 - Connection

Terminal point

Description

Internally connected
with connection

Max. current carrying capacity *)

Name

No.

+ Input 1

1

+ Input 1

-

40 mA

- Input 1

2

- Input 1

-

40 mA

GND

3

Signal ground for input 1

7

40 mA

Shield

4

Shield (FE)

8; DIN rail

100 mA **)

n.c.

5

not connected

-

-

n.c.

6

not connected

-

-

GND

7

Signal ground for input 1

3

40 mA

Shield

8

Shield (FE)

4; DIN rail

100 mA **)

*) Constant and peak value
**) Shield lines should be de-energized!

EL3021 - Connection, display and diagnostics 2:

Overcurrent protection of the 20 mA inputs

The current inputs are protected against damage by overcurrent by an internal current limitation, currents > 30 mA may occur.

  • In the event of a fault, the current limiter must not be overloaded by a voltage > 30 V from the source device.
  • Overcurrent is displayed in the process image as "Overrange".
  • After occurrence, the error condition must be stopped immediately, the source device switched off or disconnected from the input terminal.
  • If the error condition persists for a longer period of time, the internal terminal current limitation reduces the absorbed signal current for thermal reasons, depending on the ambient conditions also below 20 mA.

EL3021 - LEDs

EL3021 - Connection, display and diagnostics 3:Fig.23: RUN and ERROR LED EL3021

LED

Color

Meaning

RUN *)
 

green

These LEDs indicate the terminal's operating state:

off

State of the EtherCAT State Machine: INIT = initialization of the terminal or BOOTSTRAP = function for firmware updates of the terminal

flashing

State of the EtherCAT State Machine: PREOP = function for mailbox communication and different standard-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

ERROR **)

red

Fault indication for broken wire and if the measuring range for the respective channel is exceeded (under- or overrun)

*) If several RUN LEDs are present, all of them have the same function.
**) The error display shows the signal processing state for each channel.