Wiring Map For Serial Cable; Twisted-Pair Cable And Pin Assignments; 10/100Base-Tx Pin Assignments - AMX NXA-ENET24 Hardware Installation Manual

Installing the Switch

Wiring Map for Serial Cable

Serial Cable Wiring
Switch's 9-Pin Serial Port
2 RXD (receive data)
3 TXD (transmit data)
5 SGND (signal ground)
No other pins are used.
The serial port's configuration requirements are as follows:

Twisted-Pair Cable and Pin Assignments

For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of wires. For 1000BASE-T
connections the twisted-pair cable must have four pairs of wires. Each wire pair is identified by two different
colors. For example, one wire might be green and the other, green with white stripes. Also, an RJ-45 connector
must be attached to both ends of the cable.
Each wire pair must be attached to the RJ-45 connectors in a specific orientation.
(See the Cabling Guidelines section on page 27 for additional information.
FIG. 19 illustrates how the pins on the RJ-45 connector are numbered. Be sure to hold the connectors in the
same orientation when attaching the wires to the pins.
FIG. 19 RJ-45 Connector Pin Numbers
DO NOT plug a normal phone jack connector into any RJ-45 port. Use only twisted-
pair cables with RJ-45 connectors that conform with FCC standards.

10/100BASE-TX Pin Assignments

Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm
Category 3 or better cable for 10 Mbps connections, or 100-ohm Category 5 or better cable for 100 Mbps
connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).
Data is delivered on the standard two wire pairs (pins 1, 2, 3, and 6), and PoE power is supplied using the two
previously spare pairs (pins 4, 5, 7, and 8). Since the RJ-45 ports on the switch base unit support automatic
MDI/MDI-X operation, you can use straight-through cables for all network connections to PCs or servers, or
to other switches or hubs.
In straight-through cable, pins 1, 2, 3, and 6, at one end of the cable, are connected straight through to pins 1,
2, 3, and 6 at the other end of the cable. When using any RJ-45 port on this switch, you can use either straight-
through or crossover cable.
24
<----------------------------
----------------------------->
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Default Baud rate: 9600 bps
Character Size: 8 Characters
Parity: None
Stop bit: 1
Data bits: 8
Null Modem PC's 9-Pin DTE Port
3 TXD (transmit data)
2 RXD (receive data)
5 SGND (signal ground)
NXA-ENET24 Hardware Installation Guide