Baldor MicroFlex e100, Installation Manual

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5-18 Input / Output MN1942
5.5.3 Ethernet connectors
Ethernet connections are made using the identical RJ45 Ethernet receptacles.
Location E1 & E2
Pin Name Description
1 TX+ T
2 TX- Transmit-
3 RX+
4 -
(NC)
5 -
(NC)
6 RX- Receive-
7 -
(NC)
8 -
(NC)
To connect the MicroFlex
e
100 to other EPL devices use CAT5e Ethernet cables - either S/UTP
(screened unshielded twisted pairs) or preferably S/FTP (screened fully shielded twisted pairs).
The MicroFlex
e
100 Ethernet interface is galvanically isolated from the rest of the
MicroFlex
e
100 circuitry by magnetic isolation modules incorporated in each of the Ethernet
connectors. This provides protection up to 1.5 kV. The connector/cable screen is connected
directly to the chassis earth of the MicroFlex
e
100. Termination components are incorporated in
each of the Ethernet connectors, so no further termination is required. To ensure CE compliance,
especially where Ethernet cables are frequently unplugged, all Ethernet cables should be
bonded to the metal backplane using conductive clamps at one point at least (see section D.1.7).
Cables longer than 3 m should be S/FTP cables bonded to the metal backplane at both ends. Do
not run Ethernet cables close to AC supply cables, motor power cables, or other sources of noise
as this can sometimes cause spurious errors to be reported.
Cables may be up to 100 m (328 ft) long. Two varieties of CAT5e cable are available; ‘straight’ or
‘crossed’. Straight 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 Standardization Group (EPSG). Similarly, if a host PC does not
provide Auto-MDIX on its Ethernet port, then a crossed cable will be essential for the connection
between the PC and an EPL router, e.g. OPT036-501.
The EPL network supports the 100Base-TX (100 Mbit/s) system only, so attempting to connect
slower 10Base-T (10 Mbit/s) nodes will cause a network error.
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