EL3172 - Connection, display and diagnostics

EL3172 - Connection, display and diagnostics 1:Fig.64: EL3172 - LEDs and connection

EL3172 connection

Terminal point

Description

Internally connected with connection

Max. current carrying capacity *)

Name

No.

+ Input 1

1

Channel 1, voltage/current measurement (U/ I), positive input (+)

-

40 mA

+ Input 2

2

Channel 2, voltage/current measurement (U/ I), positive input (+)

-

40 mA

n.c

3

-

-

-

n.c

4

-

-

-

- Input 1

5

Channel 1, voltage/current measurement (U/ I), negative input (-)

-

40 mA

- Input 2

6

Channel 2, voltage/current measurement (U/ I), negative input (-)

-

40 mA

n.c.

7

-

-

-

n.c

8

-

-

-

*) Constant and peak value

EL3172 - 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.

EL3172 LEDs

EL3172 - Connection, display and diagnostics 3:Fig.66: EL3172 - 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.