Siemens Welding System ST PCS 7 User Manual

Industrial Ethernet

Siemens ST PCS 7 · November 2007

9

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The Industrial Ethernet OSM and ESM switches are used to con-

struct Industrial Ethernet networks at the control level:
• The modules are interconnected (backbone) at 100 Mbit/s 

over

- Glass fiber-optic cables (FO) for OSM 

- Twisted pair cables for ESM

• Connection of data terminals or network segments depending 

on the OSM/ESM type through 

- 2 to 8 twisted pair ports 10/100BaseTX in RJ45 or 9-pole 

Sub-D design for 10/100 Mbit/s

- 3 or 8 FO ports 100BaseFX with BFOC interface (ST socket) 

for 100 Mbit/s

• Integral redundancy manager supports high-speed media re-

dundancy also for large networks

• Very easy network configuration and extension without com-

plex configuration rules or parameterization

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The Industrial Ethernet OSM (Optical Switch Module) and ESM 

(Electrical Switch Module) are used in the construction of 

switched networks with data transmission rates of 100 Mbit/s in 

the control level range, in which strict demands are placed on 

network availability and comprehensive diagnostics are re-

quired.
In existing networks, load decoupling and thus increased net-

work performance can be achieved by creating segments (di-

viding a network into subnetworks/segments) and connecting 

these segments to an OSM/ESM.
The redundancy manager integrated into OSM/ESM allows In-

dustrial Ethernet rings to be constructed in switching technology 

with high-speed switching over of the communication path on 

failure of a switch or interruption in the transmission path (recon-

figuration time max. 0.3 seconds). 

The transmission rate in the ring is 100 Mbit/s; for each ring, up 

to 50 Industrial Ethernet OSMs (optical ring) or ESMs (electrical 

ring) can be used. Apart from the 2 ring ports, OSM/ESM has 

other ports (with either RJ45, ITP or BFOC interfaces) to which 

data terminals or network segments can be connected.
Selection support for the various product versions of OSM is pro-

vided by the table under "Technical specifications".

Industrial Ethernet nodes with RJ45 TP interface can be con-

nected via an Industrial Ethernet media converter to one of the 

8 optical ports of an OSM BC08. The two types of media con-

verter SCALANCE X101-1 or X101-1LD convert the electric 

twisted-pair interface, port type 10/100BaseTX (10/100 Mbit/s, 

RJ45 socket) as follows:
• X101-1: into an optical interface for multimode glass FOC
• X101-1LD: into an optical interface for singlemode glass FOC
The port type of the optical interface is 100BaseFX in each case 

(100 Mbit/s; 2 x BFOC socket).

:

Just like the OMC TP11 media converter, the SCALANCE X101-1 does 

not support diagnostics per SNMP protocol.
For further information on the Industrial Ethernet media converter, see 

Catalog IK PI, Section "Active network components - Industrial Ethernet 

media converter".

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1)

TP cable preferably inside a control cabinet

2)

For cross-building connection of Fast Ethernet networks with OSM

3)

For design of an optical network, where TP cables are preferably only used 

inside control cabinets

4)

Connects a station with RJ45-TP interface to one of the 8 optical ports of 

an OSM BC08

5)

Inside buildings

6)

Inside switchrooms

With 

high 

EMC 

loading

For 

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(OS-

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© Siemens AG 2007