Am-6000 Ups Status Port; Ethernet Rj-45 10Baset Connector; 10Baset Topology And Cabling; Table A-7: Am-6000 Ups Status Port Signal Pinouts - Alpha Microsystems AM-6000 Owner's Manual

Connector Configurations

AM-6000 UPS STATUS PORT

The UPS status port on the back panel of the AM-6000 is a male DB-9 connector. The UPS system also
has a male DB-9 connector for its switch contact port. To connect the UPS to the computer you will
need a cable with two female DB-9 connectors. The following table shows the pinout connections
required to make this cable. You will need an 8-wire cable, and both grounds are necessary!
CPU
Signal
Name
FAULT
GND
GND
ON BYPASS
LOW BATTERY
INVERTER ON
AC PWR FAIL

ETHERNET RJ-45 10BASET CONNECTOR

The Ethernet RJ-45 10BaseT port functions exactly like a DB-15 Ethernet AUI port. In fact, both of
these ports use the same Ethernet driver. The following section explains some of the technical aspects of
Ethernet networking, as well as the cable pinouts required when using the 10BaseT (RJ-45) interface
connector.

10BaseT Topology and Cabling

Ethernet networks were originally designed to be multi-point networks arranged as a bus topology. That
meant that Ethernet would work over coaxial cable (either thick or thin) with 50 ohm termination at each
end of the network, and each computer would attach directly to the same cable.
With the introduction of 10BaseT, Ethernet can be connected via inexpensive twisted pair (Level 5
compliant) cabling, with each computer having its own RJ-45 termination. As a result however, the
network topology is changed so that a central repeater or "hub" is required to perform the task of re-
broadcasting both data and Ethernet control signals to all other computers connected to the Ethernet.
Such repeaters are commonly available from commercial sources.
10BaseT connections use 100 ohm unshielded twisted pairs, with at least two pairs per cable (one set of
pairs for transmitting data and another for receiving). 10BaseT cables terminate in eight pin RJ-45
connectors with the following pin assignments:
AM-6000 Computer Owner's Manual, Rev. 00
←
FDB-9
3 ←
2 ←
5 ←
6 ←
7 ←
8 ←
9 ←

Table A-7: AM-6000 UPS Status Port Signal Pinouts

UPS
→
cable Signal
Name
FDB-9
1 FAULT
2 GND
5 GND
6 ON BYPASS
7 LOW BATTERY
8 INVERTER ON
9 AC PWR FAIL
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