2
Fig. 1.2 –
Net Guardian Expansion functional diagram.
1.2
Introduction
The Net Guardian Expansion box is a low cost, self contained device that provides the Net Guardian 832A with
an additional 48 ground activated discrete alarms per unit. With the capability of adding up to 3 Net Guardian
Expansions, at 48 alarm points per unit, an additional 144 discrete alarms to the Net Guardian 832A can be
provided.
To make expansion a simpler and less expensive task, each unit is equipped with dual RS232 ports so that addi-
tional Expansions can be daisy chained to one another. In this way, currently deployed Net Guardian 832As can be
easily expanded.
Overview • Summary of Features
Overview
Chapter 1
Net Guardian 832A
Net Guardian 832A
Net Guardian Expansion
Net Guardian Expansion
Net Guardian Expansion
32 Discrete Alarms
8 Analog Alarms
8 Control
48 Discrete Alarms
RS 232
RS 232
RS 232
48 Discrete Alarms
48 Discrete Alarms
A maximum of 3
Net Guardian
Expansion units can
be used in
conjunction with
the Net Guardian 832A
for a total capacity of
176 discrete alarms.
1.1
Summary of Features
• Low cost method of expansion to existing Net Guardian 832A units (SNMP and DCPX versions)
• Gives additional capacity over existing communication lines
• Helps conserve T/MonXM or IAM ports by reporting more alarms to the same address
• 48 ground activated discrete alarms per expansion
• RS232 ports for easy daisy chaining between units
• LED indications of alarms and communications status
• Easy setup
Summary of Contents for D-PC-293-10A
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