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Connector Configurations
Page A-3
AM-6060 Computer Owner's Manual, Rev. 00
CABLE CONSTRUCTION GUIDELINES
If you want to construct your own cables, there are a few things you should keep in mind:
Cable Length
We strongly recommend that RS-232C cables attached to the AM-6060 use twisted-pair cable with an
overall shield. As you increase the cable length beyond 100 feet, the reliability of the data signal
decreases. If the cables absolutely must be longer than 100 feet, signal conditioning equipment (for
example, a "short haul modem") can improve signal quality.
Cable Type
We recommend you use a twisted paired shielded and jacketed cable. The cable should be rated at least
CMP Level 3, but you can use CMP Level 5 cable for lines longer than 100 feet. Most cities require that
any low voltage communication cable have a CMP (Communication cable Plenum) rating. This type of
cable should comply with your local fire codes for installation in your facility. Using a high quality
twisted paired, overall shielded cable helps minimize electromagnetic interference. Reducing this
interference protects your system from signal noise. It also protects other devices around your Alpha
Micro computer system (such as a TV or radio) from interference radiated by an improperly shielded
system.
RS-232 RJ-45 CONNECTOR SIGNALS
The table below gives pinout information for the RJ-45 ports on the AM-90 card attached to the AM-
301-10. Pins are numbered from left to right, looking into the port from outside the computer chassis.
Pin #
Description
1
Chassis ground (shield)
GND
2
Clear to send
CTS
3
Transmit data
TXD
4
Request to send
RTS
5
Receive data
RXD
6
Data terminal ready
DTR
7
Signal ground
GND
8
Data carrier detect
DCD
CABLES AVAILABLE FROM ALPHA MICRO
The serial ports on the AM-6060 use the same plug-and-play external cabling kits as the AM-359 serial
I/O boards. The list below gives the part number and a brief description of each cabling kit available for
the AM-6060.
These cabling configurations meet the USOC (United Standards Organization Committee)
Standards.