Connection, display and diagnostics

Connection, display and diagnostics 1:Fig.4: EL4374 LED and connection

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

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

flickering

State of the EtherCAT State Machine: BOOTSTRAP = function for Firmware updates of the terminal

ERROR
Input Ch1, 2

red

- Error ADC
- Significantly below the measuring range
- Significant exceeding of the measuring range

ERROR
Output Ch3, 4

red

- Error DAC
- Analog output overload: wire break at I output, short circuit at U output
- Limiter low limit undercut
- Limiter High limit exceeded

Notice

Maximum current load of the power contacts and connection points

  • The power contacts 24 V / 0 V may be loaded with max. 10 A each
  • Outgoing 24 V / 0 V terminal points may be loaded with max. 3 A each

Notice

Cable lengths >30 m

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

EL4374 connection

Terminal point

No.

Comment

Internally connected with connection

Ch1 Input U+

1

Voltage input, channel 1

-

Ch2 Input U+

2

Voltage input, channel 2

-

+24 V

3

+24 V

4, 5, 6; +24 V power contact

+24 V

4

+24 V

3, 5, 6; +24 V power contact

+24 V

5

+24 V

3, 4, 6; +24 V power contact

+24 V

6

+24 V

3, 4, 5; +24 V power contact

Ch3 Output U+

7

Voltage/current output, channel 3

-

Ch4 Output U+

8

Voltage/current output, channel 4

-

GND

9

Analog ground (reference potential for Ch1...Ch4)

10, 15, 16

GND

10

Analog ground (reference potential for Ch1...Ch4)

9, 15, 16

Ch1 Input I+

11

Current input, channel 1

-

Ch2 Input I+

12

Current input, channel 2

-

0 V

13

0 V

14; 0 V power contact

0 V

14

0 V

13; 0 V power contact

GND

15

Analog ground (reference potential for Ch1...Ch4)

9, 10, 16

GND

16

Analog ground (reference potential for Ch1...Ch4)

9, 10, 15