EL3174-0002 - Connection, display and diagnostics

Connection EL3174-0002
Terminal point		Description	Internally connected with connection	Max. current carrying capacity *)
Designation	No.	Description	Internally connected with connection	Max. current carrying capacity *)
+ 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
+ Input 3	3	Channel 3, voltage/current measurement (U/ I), positive input (+)	-	40 mA
+ Input 4	4	Channel 4, voltage/current measurement (U/ I), positive input (+)	-	40 mA
- 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
- Input 3	7	Channel 3, voltage/current measurement (U/ I), negative input (-)	-	40 mA
- Input 4	8	Channel 4, voltage/current measurement (U/ I), negative input (-)	-	40 mA
*) Constant and peak value

	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 broken wire or 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.