AP9319 Datasheet, PDF (11/30 Pages) List of Unclassifed Manufacturers – Environmental Monitoring Unit

A-Link Connection
The Environmental Monitoring Unit can link to a variety of A-Link
compatible devices, including temperature and humidity probes and
Rack Air Removal Units (ARU). The Environmental Monitoring Unit
can support a maximum of two A-Link temperature and humidity probes
and two A-Link ARUs.
Note
A-Link is an APC proprietary CAN (Controller Area
Network) bus. A-Link compatible devices are not Ethernet
devices and cannot coexist on an Ethernet bus with other
networking devices, such as hubs and switches.
Connection guidelines
When connecting devices to the Environmental Monitoring Unit in a
cascading configuration, follow these guidelines:
• The total length of all cables used should not exceed 132 ft.
• The connection must include two APC terminators, connected to
the unused A-Link port on each device at the end of the
connection.
• Use CAT5 (or equivalent) cables for linking devices. Do not use a
crossover cable for connection.
When you apply power, the unit will not exceed 500
milliamps for more than one second.
Caution ^{The total device current draw during normal operation of}
the unit will not exceed 400 milliamps.
DIP switch addresses
To connect to A-Link compatible devices, set the DIP switch addresses
on the individually monitored devices. Refer to the user’s manual
included with the individual products for specific configuration
information. However, here are some general address guidelines:
• Two identical devices cannot share the same address. For example,
if you are connecting two Temperature/Humidity Probes, assign
each probe a different address.
• Two different devices can share the same address. For example,
you can assign address #1 to a Temperature/Humidity Probe and an
ARU.
Note
The Environmental Monitoring Unit only supports devices
addressed with a DIP switch setting of 1 or 2.
Environmental Monitoring Unit — Installation and Quick Start
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