Transition Networks SISTF10XX-160-LR(T) Operation, Power the Ethernet switch, Features, AutoCross

SISTF10xx-140-LR(T) / -160-LR(T) / -170-LR(T)

Installation -- Continued

Power the Ethernet switch

This device is suitable for use in Class I, Division 2, Groups A, B, C and D or non-hazardous locations only.

WARNING: EXPLOSION HAZARD - Do not disconnect equipment unless power has been removed or the area is known to be non- hazardous.

WARNING: EXPLOSION HAZARD - Substitution of components may impair suitability for Class I, Division 2.

The Ethernet switch is designed for both a primary and a backup power supply via the 6-contact terminal block, located on the top panel of the device. Both power inputs can be connected simultaneously to live DC power sources. If one power source fails, the other live source acts as a backup, and automatically supplies the Ethernet switch with power.

6-contact terminal block

Operation

Features

Auto-Negotiation

With the Auto-Negotiation feature, the Ethernet switch automatically configures itself to achieve the best possible mode of operation over the copper link. The device broadcasts its speed (10 Mb/s or 100 Mb/s) and duplex capabilities (either full- or half-duplex) and negotiates the best mode of operation between the two linked devices.

If the device is connected to a non-negotiating device over the copper link, it will default to 10 Mb/s speed, half-duplex mode.

AutoCross

The AutoCross feature allows either straight-through (MDI) or crossover (MDI-

X)cables to be used when connecting the Ethernet switch to devices such as PLCs or workstations. AutoCross determines the characteristics of the cable connection and automatically configures the unit to link up, regardless of the cable configuration. (Requires no operator intervention.)

backup power	V2+
contacts	V2-
primary power	V1+
contacts
	V1-

PWR2

FAULT

PWR1

V1, V2 INPUTS

12-48 VDC

The screws to secure the wire are located on the side of the terminal block.

Plug-and-Play

The Ethernet switch models are plug-and-play devices, so that software configuration is not required at installation or during maintenance.

Switching, Filtering, and Forwarding

Packets are either filtered or forwarded when they arrive at one of the switched ports.

• Packets with source and destination addresses belonging to the same port

segment are filtered and constrained to one port (relieving the rest of the

CAUTION: Before connecting the Ethernet switch to the 12-48 VDC power source, ensure the power source voltage is stable.

To provide PRIMARY (PWR1) power to the Ethernet switch:

1.Insert the positive (+) DC wire from the 12-48VDC power source into the terminal marked “V1+”.

2.Insert the negative (-) DC wire into the terminal marked “V1-”.

3.Secure the wires by tightening the corresponding screws on the side of the terminal block.

To provide BACKUP (PWR2) power to the Ethernet switch:

1.Insert the positive (+) DC wire from the 12-48VDC power source into the terminal marked “V2+”.

2.Insert the negative (-) DC wire into the terminal marked “V2-”.

3.Secure the wires by tightening the corresponding screws on the side of the terminal block.

network from the need to process them).

• Packets with a destination address to another port segment are forwarded

to the appropriate port, and are not sent to the other ports where it is not

needed.

• Packets that are used in maintaining the operation of the network (such as

the occasional multi-cast packet) are forwarded to all ports.

The Ethernet switch operates in the store-and-forward switching mode, which eliminates bad packets and enables peak performance to be achieved when there is heavy traffic on the network.

Switching and Address Learning

The Ethernet switch address table holds up to 1K node addresses, making it suitable for use with large networks. The address tables are self-learning, so that as nodes are added, removed, or moved from one segment to another, the Ethernet switch automatically keeps up with new node locations. An address- aging algorithm deletes the least-used addresses in favor of newer, more frequently used addresses. To reset the address buffer, power down the unit and then power it back up.

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