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The SMI External Interfaces
The following shows the SMI connectors and interfaces:
Figure 3: SMI interfaces
ON/OFF Switch: Turning this switch ON (1) starts the operation of the power
optimizers. Turning it OFF (0) reduces the power optimizer voltage to a low and safe
value. In the MI this functionality is disabled.
LCD Light Button: Pressing this button lights up the LCD for 30 seconds. In addition,
you can press this button to access configuration menu options, as described in
Configuring the SMI Using the LCD Light Button on page 33.
Two Communication Glands, for connection of communication options. Refer to
Setting Up Communication to the Monitoring Platform on page 44.
Power Supply Input: Used to connect the SMI to an auxiliary power supply unit.
LCD Panel: displays SMI information and configuration parameters
LCD LEDs: Three LEDs indicate the following SMI statuses:
Color
Description
Functionality
Green
Power OK
Indicates whether the SMI is connected to power.
Yellow
Module
Communication
Blinking when monitoring information is received
from a power optimizer.
Red
Fault
Indicates that there is an error. Refer to
Troubleshooting on page 58 for more
information. In addition, this LED blinks while the
SMI is being shut down.
All LEDs are on while the SMI is being configured.
Chapter 1: Introducing the SMI-180 Safety and Monitoring Interface for Large
Scale Installations
8
SMI-180 Installation Guide MAN-01-00157-1.1