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Eaton ATC-900 Automatic Transfer Switch Controller Functions

From:Eaton | author:Mr.Chen | Time :2025-08-21 | 5 view: | Share:

Functions/features/options

The primary function of the ATC-900 is to accurately monitor power

sources and provide the necessary intelligence to operate a transfer

switch in an appropriate and timely manner. In addition, the ATC-900

provides useful real-time and historical data, reliable two-way

communications, and programming through the device’s faceplate

or Modbus RTU. The ATC-900 features digital signal processor (DSP)

technology to provide and maintain superior precision and versatility

during both programming and data access.

Operational simplicity

From installation, to programming, to usage, the ATC-900 was

designed with operational simplicity in mind. Only two styles need

to be considered, regardless of input/output requirements or system

voltages and frequencies. The ATC-900 provides the functionality of

numerous other devices combined in one package that mounts in

less than 7 by 11 inches of panel space.

The user-friendly front panel interface simplifies routine operation,

setpoint programming, and data presentation. A large color display

provides flexibility and ease of use. Front panel membrane pushbut

tons are used to navigate the intuitive menus and screens. A single

unit status LED at the top of the faceplate provides an immediate

indication as to the device’s operational mode. Pressing the Help

button provides immediate user assistance messages on the front

panel display.

The ATC-900 is communications ready, including Modbus RTU,

Ethernet (via external communication module), and USB for thumb

drives (memory sticks).

Standard and optional features

A variety of programmable features are available to meet a wide

array of application requirements. Individual features or feature

combinations provide the information required to tailor switches to

individual needs.

Unlike earlier controllers, the ATC-900 comes with standard features

that are ready to use, with the exception of closed transition, current

metering, and Ethernet. Another advancement is that there are four

(4) standard inputs and four (4) standard outputs that the operator

can easily program by choosing from a wide array of predefined

functions. Additional inputs and outputs can be added in groups of

four (4) up to sixteen (16) for a maximum of twenty (20) in total.

Consult section 4.2.1 for I/O specifications.

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