Siemens SIMATIC NET Instrucciones de operaciones descargar pdf (Pagina 129)

Active Components and Topologies

6-13

SIMATIC NET Tw isted-Pair and Fiber-Optic Networks

C79000-G8976-C125-02

The OSM/ESM has a total of eight LAN ports. Depending on the particular variant,

they have the following ports:

S Twisted-pair port (sub-D): 10/100BASE-TX

9-pin sub-D female connector (ITP port), automatic data rate detection (10 or

100 Mbps) for connection of TP cables (max. length 100 m)

S Twisted-pair port (RJ-45): 10/100BASE-TX

RJ-45 jack, automatic data rate detection (10 or 100 Mbps) for connection of

TP Cords (max. length 10 m, in conjunction with FC Outlets RJ-45 and

Industrial Ethernet FastConnect cable (patch cabling) up to 100 m)

S Glass FOC: multimode (MM); 100BASE-FX BFOC

2 BFOC sockets per port, data rate 100 Mbps, for connection of multimode

FOC in environments with high EMI levels and for distances up to 3000 m

between two OSMs

S Glass FOC: single mode (SM); 100BASE-FX BFOC

2 BFOC sockets per port, data rate 100 Mbps, for connection of single mode

FOC in environments with high EMI levels and for distances up to 26 km

between two OSM ITP62-LD modules

6.2.3 Functions

Increased Network Performance

By filtering the data traffic based on the Ethernet (MAC) address of the DTEs, local

data traffic remains local, only data intended for nodes in another subnet is

forwarded by the OSM or ESM.

Simple Network Configuration and Network Expansion

A total network span of up to 150 km (OSM) or 5 km (ESM) presents no problem.

OSMs and ESMs store the data received at the ports and then direct it to the

destination address. The restriction of the network span resulting from collision

detection (CSMA/CD) ends at the OSM/ESM port.

Error Containment

The OSM/ESM limits the propagation of errors in a network to the subnet involved

because it forwards only valid data.

Integration of Ethernet Networks Operating at 10 Mbps and 100 Mbps

The OSM/ESM is suitable for the integration of existing subnets operating at 10

Mbps in Fast Ethernet networks operating at 100 Mbps.

The OSM/ESM automatically detects the data rate (10 or 100 Mbps) at the

twisted-pair ports as well full or half duplex operation.

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 337 338

Sin comentarios

Siemens SIMATIC NET Instrucciones de operaciones Pagina 129