Siemens SIMATIC S7-400 Reference Manual page 331
Automation system module
data
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6.2 Interface modules IM 460-0 (6ES7 460-0AA01-0AB0) and IM 461-0 (6ES7 461-0AA01-0AA0)
Operator controls and indicators on the send IM
Table 6-6
EXTF LED (red)
C1 LED (green)
C1 LED (flashing
green)
C2 LED (green)
C2 LED (flashing
green)
Front connectors
X1 and X2
The LEDs EXTF, C1 and C2 do not light up if the terminator is not inserted or the line is
interrupted when in POWER ON mode. In this case the IM 460 identifies an unoccupied
interface.
Operator controls and indicators of the receive IM
Table 6-7
INTF LED (red)
EXTF LED (red)
DIP switch
Front connector
X1
Front connector X2 Lower connector (output) for the cable to the next interface module or for the
Parameter assignment for the mounting rack number
Using the DIP switch on the front panel of the module, you must set the number of the mounting
rack in which the receive IM is installed. The permitted range is 1 to 21.
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
Operator controls and indicators on the send IM
LEDs
Lights up in the event of an external fault. Line 1 or line 2 is faulty (terminator missing
or broken cable)
Line 1 (via front connector X1, connection 1) is correct.
An EU in the line is not ready for operation because:
● The power supply module is not switched on
● A module has not yet completed the initialization process
Line 2 (via front connector X2, connection 2) is correct.
An EU in the line is not ready for operation because:
● The power supply module is not switched on
● A module has not yet completed the initialization process
Connector (output) for line 1 and line 2
X1 = upper front connector; X2 = lower front connector
Operator controls and indicators of the receive IM
LEDs
Lights up if a rack number > 21 or = 0 was set.
Lights up if you have changed the rack number under voltage.
Lights up in the event of an external fault (line fault, for example, if the terminator
is not inserted or if a module has not yet completed the initialization process).
DIP switch to set the number of the mounting rack.
Upper connector (input) for the cable from the previous interface module.
terminator.
Meaning
Meaning
Interface modules
331
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