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MIU Installation, Operation & Diagnostics Edition: March 30, 1998 Page 3
2. PRODUCT OVERVIEW
The MIU2.4, MIU9.6, MIU14.4 & MIU28.8 are industrial grade dial
modems for connection to the Public Switched Telephone Network..
They can be powered from a wide range of AC and DC power supplies,
they are internally surge protected on both the power and analog lines,
and they will operate in temperatures from -40 to +85 deg C.
Internally, each unit consists of a baseboard and a communication
module. The baseboard includes the power supply regulation and surge
protection. The communication module is a Telenetics™ Pony
Express™ Dial Modem Module.
The MIU is packaged specifically for the harsh environments found in
utility substations and industrial facilities. Though functionally similar to
commercial modems, the MIU includes special features that make it
particularly well suited for utility and industrial applications:
Environment: The MIU has been designed specifically for use in
harsh environments. In addition to an extended
temperature range (-40 to +85º C), the MIU includes
surge, shock, vibration, and safety features superior
to those of conventional commercial modems.
Power Supply: The MIU can be powered from a broad range of AC
and DC power supplies, such as an auxiliary supply
(eg; 12VDC) from another piece of equipment,
125VDC from a station battery or a standard
120VAC.
Low Power: The MIU dial modem can be configured to enter into
a “power down” mode. In this mode, an MIU will
consume only a small fraction of its active power
while waiting for either controller or telephone
activity.