Technical information

88
Standard Modicon STB congurations (continued)
Primary segment with expansion segments
The island bus can support the primary segment with up to 6 expansion segments
(7 segments in all).
A standard NIM network interface module supports up to 32 I/O modules (excluding
power distribution modules, network interface modules, bus termination, auxiliary
power supplies, and EOS/BOS bus expansion modules).
Standard.Modicon.STB.with.3.segments
The segments in the above Modicon STB conguration comprise:
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.
2 STBPDT100K: A standard 24 V  or 115/230 V  PDM power distribution
module. This is installed immediately to the right of the NIM and distributes the
24 V  or 115/230 V , according to the type of I/O modules located on the right.
3 STBAV, STBAC, STBAR, STBDD, STBDAand STBDR: Digital (Discrete)
I/O modules with DC or AC power. They are placed immediately to the right of the
PDM power distribution module.
4 STBXBE1100K: EOS bus expansion module. This is always installed in the
farthest right slot in the primary or expansion segment, and extends the island
bus to another segment.
5 STBXBE1300K: BOS bus expansion module. This is installed at the beginning of
each expansion segment (1).
6 STBXMP1100: An island bus termination plate (2).
7 STBXCA100: Island bus extension cables.
(1).The.BOS.bus.expansion.module.STBXBE1300K.provides.a.5.V.c.12.A.logic.power.supply,.
from.an.external.24.V.c.power.supply.This.power.supply.is.distributed.to.island.segment.modules.
located.on.its.right
(2).Supplied.with.the.NIM.network.interface.module
Congurations.(continued)
Modicon STB distributed I/O
solution
Open and modular system
1 2 5 2 5 2 623 33 34 47 7
15 m max. with 32 I/O modules or external devices