Siemens Simatic M7-400 Reference Manual page 373

Function
The interface module pair IM 460-1 (send IM) and IM 461-1 (receive IM) are used
for a local link (up to a maximum 1.5 m in total). A 5 V supply voltage is also
transferred with these interface modules. Please particularly remember the
following points:
• The current requirements of the module plugged into the EU must not exceed
5 V/5 A.
• You can only connect one EU per line.
• The modules in this mounting rack are not supplied with 24 V and are not
backed up.
• The communication bus is not transferred with the interface module pair
IM 460-1 and IM 461-1.
• You must not use a power supply module in the EU.
Note
If you connect an EU via a local link with 5 V transmission, ungrounded operation
is prescribed for the EU (see Installation Manual, Chapter 4)
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 power supply module in the CC into the position
2. Enter the number using the DIP switch.
3. Switch the power supply module on again.
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Interface Modules
(Output voltage 0 V).
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