150961 1-1
Section 1
Introduction
The Model 4821/4820 is a control/communicator for use in residential and commercial
security applications, commercial and residential fire applications. The Model 4821 includes a
sophisticated access control system, through which you can monitor and control user access to
specific areas of a building (see Section 3 for detailed information on access control).
1.1 Overview of System Features
The 4821 and 4820 are shipped with a Model 9227 transformer and 16 Model 7628EOL
resistors (each 4.7 k ohm).
4820 4821 System Feature
3
3
400 zones, 16 on 4821/4820 board, additional available with expansion devices
(Model 4815 zone expander, Model 4825 zone expander, Model 4860C touchpad)
3 Can use the Model 4421 Door Access Module as an expansion device.
3
3 8 partitions, 8 areas within each partition
3 32 reporting accounts
3
8 reporting accounts
3
3 24 touchpads / card readers
3
3
One monitored phone line on 4821/4820 board, expandable to two lines with Model
4875 Second Phone Line Expander
3 100 User Profiles
3
20 User Profiles
3 1800 User Codes
3
500 Users Codes
3 50 Time Schedules (with 20 time ranges each)
3
25 Time Schedules (with 20 time ranges each)
3
3 8 Universal Schedules (with 20 time ranges each)
3
3
2.5 amps power available, expandable to 5.0 amps with 4195 Auxiliary Power
Module
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