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Chapter 3
System Interfaces
Introduction
There are three different ways to activate the Sm@rt DAS
system:
Switch & Lights
HMI
MODBUS communication
This section will deal with the different schemes and
implementations available and how they function.
Switch
Inputs
Power
Supply
(120VAC
or 24VDC)
Ethernet
MODBUS
TCP/IP
Output
LEDs
Figure 3.1: Sm@rt DAS Controller with one switch and one light per breaker
8
24VDC
I.0
I.1
I.2
I.3
O.0
O.1
O.2
O.3
One Switch and Light per Breaker
This is the default configuration. Each input activates
maintenance mode for one breaker. There is also a dedicated
output for each breaker that confirms when the breaker has
entered maintenance mode. Figure 3.1 highlights the
configuration. For example, Input 0 (I.0) and Output 0 (O.0)
will be the input and output controlling maintenance mode
on breaker one.
I.4
I.5
I.6
I.7
O.4
O.5
O.6
O.7
I.8
I.9
O.8
O.9
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