Siemens SCALANCE X-200 Spezifikationen PDF herunterladen (Seite 15)

Description

2.2 Description of the SCALANCE X-300 product line

SCALANCE X-300

Operating Instructions, 01, A5E01113043

Signaling contact

The signaling contact (relay contact) is a floating switch with which error/fault states can be

signaled by breaking the contact.

The signaling contact is connected to a 2-pin plug-in terminal block.

The signaling by the signaling contact is synchronized with the fault LED, in other words, all

errors displayed by this LED (freely configurable) are also signaled on the signaling contact.

If an internal fault occurs, the fault LED lights up and the signaling contact opens.

The connection or disconnection of a communication node on an unmonitored port does not

lead to an error message.

The signaling contact remains activated until the error/fault is eliminated or until the current

status is entered in the fault mask as the new desired status.

2.2.4 Ethernet interfaces electrical ports

2.2.4.1 10Base-T / 100Base-TX

Transmission rate

The transmission rate of the electrical ports is 10 Mbps or as Fast Ethernet ports 100 Mbps.

Transmission mode

The transmission mode for 10Base-T / 100Base-TX is specified in the IEEE 802.3i / IEEE

802.3u standards of the Institute of Electrical and Electronic Engineers.

Autonegotiation (automatic detection of the best transmission modes) is default. The order in

which they are selected is:

• 100Base-TX full duplex

• 100Base-TX half duplex

• 10Base-T full duplex

• 10Base-T half duplex

Two communication modes are possible:

• Half duplex

Two-way alternate transmission mode - it is only possible to either send or receive over

the interfaces at any one time.

• Full duplex mode

Two-way simultaneous - both communication partners can send and receive at the same

time.

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