Siemens Simatic M7-400 Reference Manual page 382

Interface Modules
Operator Controls and Indicators on the Send IM
EXTF LED
(red)
C1 LED
(green)
C1 LED
(flashing
green)
C2 LED
(green)
C2 LED
(flashing
green)
Operator Controls and Indicators of the Receive IM
INTF LED (red)
EXTF LED (red)
DIP switch
Front connector X1 Upper connector (input) for the connecting cable from the previous
Front connector X2 Lower connector (output) for the connecting cable to the next
6-20
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 or
•
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 or
•
A module has not yet completed the initialization process
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, or if the CC is switched off)
DIP switch to set the number of the mounting rack.
interface module.
interface module or for the terminator.
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07