EL3124 - Connection, display and diagnostics

EL3124 - Connection, display and diagnostics 1:Fig.22: EL3124 - LEDs and connection

Connection EL3124

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

+ Input 3

3

+ Input 3

-

40 mA

- Input 3

4

- Input 3

-

40 mA

+ Input 2

5

+ Input 2

-

40 mA

- Input 2

6

- Input 2

-

40 mA

+ Input 4

7

+ Input 4

-

40 mA

- Input 4

8

- Input 4

-

40 mA

*) Constant and peak value

EL3124 - Connection, display and diagnostics 2:

GND connection points

The GND connection points of the terminal are not connected internally directly, but via EMC protection components. Therefore, each analog encoder/sensor must be connected separately with 2 wires, even if the connection diagram of the terminal for the channels indicates a common ground (GND).

EL3124 - Connection, display and diagnostics 3:

Current carrying capacity of the input contacts

The maximum permitted current on the signal-relevant terminal points (inputs, GND) is 40 mA (if applicable).

EL3124 - Connection, display and diagnostics 4:

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.

LEDs

LED

Color

Meaning

RUN*

green

This LED indicates 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 in the event of undershooting or overshooting of the measuring range

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