EL3174-0090 - Connection, display and diagnostics

EL3174-0090 - Connection, display and diagnostics 1:Fig.86: EL3174-0090 - LEDs and connection

EL3174-0090 connection

Terminal point

Description

Internally connected with connection

Max. current carrying capacity *)

Name

No.

Ch1 U+

1

Channel 1, voltage measurement, positive input (U+)

-

not applicable (voltage inputs)

Ch2 U+

2

Channel 2, voltage measurement, positive input (U+)

-

Ch3 U+

3

Channel 3, voltage measurement, positive input (U+)

-

Ch4 U+

4

Channel 4, voltage measurement, positive input (U+)

-

+24 V DC

5, 6, 7, 8

+24 V

Positive power contact

1 A

Ch1 U-

9

Channel 1, voltage measurement, negative input (U-)

-

not applicable (voltage inputs)

Ch2 U-

10

Channel 2, voltage measurement, negative input (U-)

-

Ch3 U-

11

Channel 3, voltage measurement, negative input (U-)

-

Ch4 U-

12

Channel 4, voltage measurement, negative input (U-)

-

Ch1 I-

13

Channel 1, current measurement, input (I)

-

40 mA

Ch2 I-

14

Channel 2, current measurement, input (I)

-

40 mA

Ch3 I-

15

Channel 3, current measurement, input (I)

-

40 mA

Ch4 I-

16

Channel 4, current measurement, input (I)

-

40 mA

*) Constant and peak value

EL3174-0090 - 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.

EL3174-0090 LEDs

EL3174-0090 - Connection, display and diagnostics 3:Fig.88: EL3174-0090 - LEDs

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 terminal firmware updates

flashing

State of the EtherCAT State Machine: PREOP = function for 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

ERROR**

red

Error indication in the event of a wire break or when the measuring range is exceeded or not reached

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