Avocent ESP Multi-Interface Serial Hub SuperSerial Installationsanleitung PDF herunterladen (Seite 5)

3 Equinox ESP-2 MI Serial Hub Installation Guide

When RS-422 signalling is set, the receiver and transmitter are always enabled.

Pin Assignments

Table 3 lists the pin assignments for the ports’ DB-9 connectors. This information is also

provided on a label on the bottom of the unit.

Pin RS-232 RS-422 RS-485

1 DCD RXD(+) N/C

2 RxD RXD(-) N/C

3 TxD TXD(+) Data(+)

4 DTR TXD(-) Data(-)

5 GND GND GND

6 DSR N/C N/C

7 RTS N/C N/C

8 CTS N/C N/C

9 N/C N/C N/C

Not supported: RI, RS-422 RTS and CTS differential control signals

Table 3. Serial Port Pin Assignments

NOTE: Unused pins (labeled N/C) should not have wires attached to them. Floating wires could

cause unbalanced noise, shorten overall distances and degrade performance.

Table 4 lists the pin assignments for the RJ-45 shielded Ethernet connector.

Pin Signal

1 Transmit Data +

2 Transmit Data -

3 Receive Data +

4 *

5 *

6 Receive Data -

7 *

8 *

* These pins are usually connected in a standard Ethernet CAT 5 cable. There is special termination

for those signals in the interface to eliminate any problems if they are connected.

Table 4. Ethernet Connector Pin Assignments

Electrical

The ESP-2 MI has two electrical power connectors on the front of the unit. These connectors

are labeled POWER 9-30VDC 4W. You may use either one of these connectors, but not both.

• The unit ships with an external power adaptor. This adaptor includes a barrel plug that is

inserted into the leftmost power connector on the unit’s front panel.

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Avocent ESP Multi-Interface Serial Hub SuperSerial Installationsanleitung Seite 5