Technical information

3838
Presentation
Power distribution modules (PDM) distribute the sensor and actuator eld power
supplies to the I/O modules of the island segments which require them.
These power supplies are distributed via the bases of the modules that are
mechanically and electrically interconnected.
There are four PDM modules, according to the range and type of power supply
distributed:
 Two basic PDM modules:
 STBPDT3105K: PDM module dedicated to distributing a single 24 V  eld
power supply.
 STBPDT2105K: PDM module dedicated to distributing a single 115/230 V  eld
power supply.
 Two standard PDM modules:
 STBPDT3100K: PDM module dedicated to the separate distribution of two
24 V  eld power supplies.
 STBPDT2100K: PDM module dedicated to the separate distribution of two
115/230 V  eld power supplies.
When an island segment is created, the 24 V , 115 V  and 230 V  I/O modules
must be grouped together and managed by separate PDM modules.
The rst PDM module in an island segment must be placed in the second position on
the segment, after the NIM module in the primary segment or after the BOS
expansion module in an expansion segment. The PDM modules that follow must be
placed in the rst position in the group of I/O modules they supply.
All PDM modules incorporate a protective earth (PE) connection via a captive screw,
located at the base of the module. The protective earth (PE) is distributed to the I/O
modules in the same way as the eld power supplies, via the bases of the modules
that are mechanically and electrically interconnected.
Presentation
Modicon STB distributed I/O
solution
Power distribution modules