EL3351 - LEDs and connection

EL3351 - LEDs and connection 1: — Connection EL3351

EL3351 - LEDs

LED	Color	Meaning
RUN 1 RUN 2	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 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
		flickering	State of the EtherCAT State Machine: BOOTSTRAP = function for firmware updates of the terminal
ERROR 1	red	Range violation of the signal voltage U_D or wire break
ERROR 2	red	Range violation of the reference voltage U_ref

EL3351 - Connection

Terminal point		Description
Name	No.	Description
+U_D	1	+ input measuring voltage
-U_D	2	- input measuring voltage
- U_V	3	0 V (supply voltage)
Shield	4	Shield
+ U_REF	5	+ input reference voltage
- U_REF	6	- input reference voltage
+U_V	7	+5 V (supply voltage)
Shield	8	Shield

Electrical isolation of the inputs

EL3351 - LEDs and connection 2: — Electrical isolation of the inputs

EL3351 wiring

EL3351 - LEDs and connection 3: — EL3351 wiring

The supply voltage U_V can be drawn from the terminal or can be supplied from an external source. The terminal supplies 5 V. The maximum input voltage U_REF is limited to 12 V.