Electric Company Computer Drive User Manual

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5-16 Input / Output MN1942

5.4.3 Ethernet connectors

Ethernet connections are made using the identical RJ45 Ethernet receptacles.

Location

E1 & E2

Pin Name Description

1 TX+ Transmit+

2 TX- Transmit-

3 RX+ Receive+

4 - (NC)

5 - (NC)

6 RX - Receive-

7 - (NC)

8 Shield Shield connection

To connect the MicroFlex e100 to other EPL devices, ordinary shielded CAT5 Ethernet cables

are used. Cables may be up to 100m (328 ft) long. Two varieties of CAT5 cable are available;

‘straight’ or ‘crossed’. S traight cables have the TX pins of the connector at one end of the cable

wired to the TX pins of the RJ45 connector at the other end of the cable. Crossover cables have

the TX pins of the connector at one end of the cable wired to the RX pins of the RJ45 connector

at the other end of the cable.

Provided the network consists of only Baldor EPL controllers and drives (and any hub), straight

or crossed cables may be used. This is because many Ethernet devices, including hubs and all

Baldor EPL products, incorporate Auto-MDIX switching technology which automatically

compensates for the wiring of the straight cable. However, if other manufacturer’s EPL nodes are

included in the network, crossover cables should be used as recommended by the ETHERNET

Powerlink S tandardization Group (EPSG).

The MicroFlex e100 Ethernet interface is galvanically isolated from the rest of the MicroFlex e100

circuitry by magnetic isolation modules incorporated in each of the Ethernet connectors. This

provides protection up to 1.5kV. The connector/cable screen is connected directly to the chassis

earth of the MicroFlex e100. Termination components are incorporated in each of the Ethernet

connectors, so no further termination is required.

The EPL network supports the 100Base-TX (100Mbit/s) system only, so attempting to connect

slower 10Base-T (10Mbit/s) nodes will cause a network error.