Technical information

3939
Presentation (continued)
Basic PDM modules
STBPDT105K basic PDM modules distribute the sensor and actuator eld power
supplies to the I/O modules (1) via a single supply bus 3.
Basic PDM modules have 1 removable fuse, to protect the I/O modules they supply.
There are two possible congurations for the 24 V  supply for an island primary
segment:
 A single 24 V  supply, for the NIM network interface module and the 24 V  I/O
modules. Low-cost conguration.
 Two separate 24 V  supplies, for the NIM network interface module and the
24 V  I/O modules. This conguration allows disconnection of the 24 V  I/O
power supply while maintaining that of the NIM module, and thus of the machine
bus. This layout is used for example in a conguration with I
nterBus NIM module.
Standard PDM modules
STBPDT100K standard PDM modules distribute the sensor and actuator eld
power supplies to the I/O modules (1) separately, via a sensor bus 1 and an actuator
bus 2.
Standard PDM modules have 2 removable fuses, to protect the I/O modules they
supply.
There are three possible congurations for the 24 V  supply for an island primary
segment:
 A single 24 V  supply, for the NIM network interface module and the 24 V  I/O
modules.
 Two separate 24 V  supplies, for the NIM network interface module and the
24 V  I/O modules.
 Three separate 24 V  supplies, for the NIM network interface module, the
24 V  input modules and the 24 V  output modules.
The third conguration allows:
 Disconnection of the I/O power supply while maintaining the power supply to the
NIM network interface module and thus to the machine bus. For example, in an
InterBus NIM conguration.
 Isolation of the power supply to the outputs from that of the inputs to increase
electromagnetic immunity.
 Independent power supply of the outputs, enabling connection of a Preventa
module. If these outputs are disconnected, the inputs continue to be managed.
(1).One.PDM.power.distribution.module.can.supply.power.to.both.digital.and.analog.I/O.modules.
simultaneously.
(2).It.is.possible.to.insert.a.Preventa.safety.module.between.the.24.V.c.power.supply.and.the.
actuator.supply.input.on.the.PDM.module.This.layout.makes.it.possible.to.disconnect.the.power.
supply.of.the.outputs.(actuators).while.keeping.the.inputs.(sensors).powered..
In.addition,.connecting.the.outputs.of.the.Preventa.module.to.a.digital.I/O.module.enables.the.
status.of.an.emergency.stop.mushroom.head.pushbutton.to.be.determined.Consult.the.
“Preventa.safety.functions.and.solutions”.catalogue
Presentation.(continued)
Modicon STB distributed I/O
solution
Power distribution modules
IN
OUT
IN
OUT
115/230 V 115/230 V
24 V

3
3
IN/OUT IN/OUT
Conguration.with.basic.PDM.and.two.separate.24.V.
power.supplies
IN
OUT
IN
OUT
115/230 V 115/230 V
24 V

3
3
IN/OUT
IN/OUT
Conguration.with.basic.PDM.and.one.24.V.power.supply.
(2)
Conguration.with.standard.PDM.and.three.separate.24.V..
power.supplies
115/230 V 115/230 V
115/230 V24 V
IN
OUT
IN
OUT
1 1
2
2