Siemens Simatic M7-400 Reference Manual page 370

Interface Modules
Function
The interface module pair IM 460-0 (send IM) and IM 461-0 (receive IM) are used
for a local link. The communication bus is transferred at the full transmission rate.
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.
Setting/Changing the Number
Proceed as follows:
1. Put the switch of the power supply module in the EU in which you want to make
a change in the position
2. Enter the number using the DIP switch.
3. Switch the power supply module on again.
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)
Front
connectors X1
and X2
6-8
(Output voltage 0 V).
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
Connector (output) for line 1 and line 2
X1 = upper front connector; X2 = lower front connector
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07