EL3078 - Connection, display and diagnostics

EL3078 – connection

Terminal point		Description	Max. current carrying capacity *)
Name	No.	Description	Max. current carrying capacity *)
Ch 1 U+	1	Channel 1, voltage measurement, positive input	not applicable (voltage inputs)
Ch 2 U+	2	Channel 2, voltage measurement, positive input
Ch 3 U+	3	Channel 3, voltage measurement, positive input
Ch 4 U+	4	Channel 4, voltage measurement, positive input
Ch 5 U+	5	Channel 5, voltage measurement, positive input
Ch 6 U+	6	Channel 6, voltage measurement, positive input
Ch 7 U+	7	Channel 7, voltage measurement, positive input
Ch 8 U+	8	Channel 8, voltage measurement, positive input
Ch 1 I-	13	Channel 1, current measurement, input	50 mA (see note “Overcurrent protection of the 20 mA inputs”)
Ch 2 I-	14	Channel 2, current measurement, input
Ch 3 I-	15	Channel 3, current measurement, input
Ch 4 I-	16	Channel 4, current measurement, input
Ch 5 I-	13	Channel 5, current measurement, input
Ch 6 I-	14	Channel 6, current measurement, input
Ch 7 I-	15	Channel 7, current measurement, input
Ch 8 I-	16	Channel 8, current measurement, input
Notice *) Constant current; short-term higher currents are to be avoided and can cause thermal overload (damage)

	Overcurrent protection of the 20 mA inputs The current inputs are protected against damage due to overcurrent by an internal electronic overcurrent detection with self-resetting current path separation. The overcurrent is caused by an occasionally excessive sensor voltage. Depending on the duration and level of the voltage applied, currents > 200 mA can also occur briefly (tripping time: µs range) until the current path separation becomes effective. Approximately 1 second after an overcurrent detection and the resulting current path separation, the current path is closed again. If the excessive sensor voltage is still present, an overcurrent is detected again and the current path is opened. This process is repeated as long as the excessive voltage is present (auto-retry). To ensure that the current path separation is not overloaded, the dielectric strength in the current measuring range must be observed (see technical data). Overcurrent is indicated in the process image as "Overrange". After it occurs, the error condition must be eliminated immediately.

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	off	No error
Error**)	red	on	Error is present, corresponds to PDO Error
) If there are multiple RUN LEDs, they all have the same function. *) For channels 1 to 8.