Technical information

77
Standard Modicon STB congurations
Single segment
With a standard NIM network interface module it is possible to create an island with
only one segment (“single” segment) comprising up to 32 I/O modules (excluding PDM
power distribution modules, NIM network interface module, bus termination and
auxiliary power supply).
Single.segment.standard.Modicon.STB
In the example above, the single segment comprises:
1 STBN21: A standard NIM (Network Interface Module). This is placed at the
beginning of the primary segment. Each island must have only one NIM module
(1).
2 STBPDT210K: A basic (2) or standard (3) PDM (Power Distribution Module).
This is installed immediately to the right of the NIM and distributes the 115/230 V
voltage to the I/O modules powered with AC.
3 STBDAK: Digital (Discrete) I/O modules with AC power.
4 STBPDT310K: A basic (2) or standard (3) PDM power distribution module. This
is installed after all the 115/230 I/O modules. It distributes the 24 V  voltage
to the I/O modules powered with DC.
5 STBAVK, STBACK, STBDDK: Digital or analog I/O modules powered
with DC.
6 STBXMP1100: A bus termination plate (4).
(1).The.auxiliary.power.supply.module.STBCPS2111K.(not.shown).supplies.a.5.V.c.12.A.logic.
power.supply.in.addition.to.that.of.the.NIM.module.This.module.is.used.when.the.island.segment.
I/O.modules.draw.a.current.higher.than.12.A.It.must.be.combined.with.a.PDM.power.distribution.
module
(2).Basic.PDMs.isolate.the.internal.5.V.c logic.power.supply.and.the.common.24.V.c.power.
supply.for.the.inputs/outputs
(3).Standard.PDMs.isolate.the.internal.5.V.c logic.power.supply.and.the.separate.24.V.c.power.
supplies.for.the.inputs/outputs
(4).Supplied.with.the.NIM.network.interface.module
Congurations
Modicon STB distributed I/O
solution
Open and modular system
1 2 3 4 5 62 3 4 5
32 I/O modules max.