LEDs and connection

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
		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 terminal firmware updates
AS-i Diag	green	This LED lights up during the AS-i data exchange phase (it flickers in regular operation).
Set switch	green	This LED is on as long as both set inputs are short-circuited.
AS-i Power	green	This LED is on as long as the AS-i power supply is connected and at least one AS-i slave was found.
AS-i fault diagnostics	red	This LED flashes if the nominal and actual configuration do not match. Possible causes: AS-i ID code of one or several slaves does not match the currently projected values. The AS-i I/O code of one or several slaves does not match the currently projected values. The currently projected AS-i slave was not found.
Protected mode	green	This LED lights up as long as the two protected mode inputs are short-circuited.

AS-i installation

WARNING

Risk of injury through electric shock and damage to the device!

Bring the Bus Terminals system into a safe, de-energized state before starting mounting, disassembly or wiring of the Bus Terminals.

Connection of the AS interface

LEDs and connection 2: — Connection of EL6201 AS-i master

Terminal contact	Name	Use
1 and 5	SCM	Setting of the configuration mode by briefly bridging contacts 1 and 5
2 and 6	ASi+	ASi+ connection (brown). Both terminal points identified with ASi+ are connected internally.
3 and 7	ASi-	ASi- connection (blue). Both terminal points identified with ASi- are connected internally.
4 and 8	SPM	The detected slaves from the list of detected slaves can be projected for the protected mode by briefly bridging the two SPM contacts 4 and 8.

Connection AS-i potential supply terminal EL9520

LEDs and connection 3: — Connection AS-i potential supply terminal EL9520

Terminal contact	Name	Use
1	Uin+	Positive voltage input 24 V..35 V
2	ASi+	Connection AS-i+ Both terminal points identified with ASi+ are connected internally.
3	ASi-	Connection AS-i- Both terminal points identified with ASi- are connected internally.
4		not used
5	Uin-	Negative voltage input 24 V..35 V
6	ASi+	Connection AS-i+ Both terminal points identified with ASi+ are connected internally.
7	ASi-	Connection AS-i- Both terminal points identified with ASi- are connected internally.
8		not used

Wiring of the AS interface

LEDs and connection 4: — Wiring diagram (example) for EL6201 AS-i master: connection to EL9520 (left), connection to AS-i power supply unit (right)

Since the user data are modulated on the power supply line with the AS-Interface, a special AS-i power supply unit (30.5 V_DC) is required.
A further possibility is offered by the EL9520 AS-i potential supply terminal, which provides the supply direct from the EtherCAT Terminal network.