User Manual Part 3
Communication modules
7.2 ASM 452
SIMATIC RF300
System Manual, Release 04/2006, J31069 D0166-U001-A2-7618
7-13
PROFIBUS cable with 24 V supply
The ASM 452 can also be operated with the "green" PROFIBUS cable. It is important to
ensure that a 24 V cable is connected from X12 to X13. The 24 V cable can be connected to
pins 5 and 6 in plug X12.
;
;
;
;
;
;
Figure 7-11 PROFIBUS cable with 24 V supply
PROFIBUS address and terminating resistor
You must remove the connector plate from the ASM before you set the
PROFIBUS address or connect the terminating resistor. The connector plate covers the DIL
switch. The position of the DIL switch in ASM is shown in the figure below with one setting
example for each case.
21
2II
RQ
([DPSOH352),%86DGGUHVVRQGHOLYHU\
([DPSOH7HUPLQDWLQJUHVLVWRU2II
$VGHOLYHUHGVWDWH
6WDQGDUG
PRGH
XVH*6'ILOH
6,(0%
Figure 7-12 Setting the PROFIBUS address/connecting the terminating resistor
Note
• The PROFIBUS address in ASM 452 must always match the PROFIBUS address defined
in the configuring software for this ASM.
• To ensure that the terminating resistor functions correctly, you must always switch both
DIL switches of the terminating resistor to "on" or "off".