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Section 1: Introduction
The PC4850 Telephone Entry Module connects to PC4020
v3.2 and higher systems to provide access control and
communication to tenants of condominiums, offices, or
apartment buildings. The PC4850 uses the tenant’s exist-
ing telephone line to allow tenants to communicate with
visitors and, if desired, to open the entry door for them.
Each PC4850 module can provide access control for up to
two building entry points.
You can program up to 1500 users on each PC4020 v3.2
and higher system.
1.1 About PC4850 Manuals
The PC4850 manual set provides installation and pro-
gramming instructions for the PC4850 module.
Installation Manual
Please read this manual before installing the PC4850
module.
On page 11 of this manual is a Tenant Information
Record Sheet. You can photocopy this form for your cus-
tomers so that they can keep a record of the user pro-
gramming for their system. On page 10 of this manual is
a programming worksheet for you to record your
PC4850 programming choices.
1.2 Features
• Supports up to 1500 users
• Connect up to 16 PC4850 modules to the system (all
PC4850 modules share one telephone line)
• Programmable locally using a Maxsys system keypad
• Uploading and downloading of data from a remote
computer using DLS-3
• Each PC4850 can control up to 2 entry points
1.3 Specifications
• Connects to PC4020 panel with 4-wire Combus
• AC input - 16V
AC
, 40VA
• Backup power source - 12 V
DC
, 4Ah compatible (not
included)
• Battery charger - 350mA to charge 12V
DC
lead acid
batteries (observe all safety instructions provided by
battery manufacturer)
• Door strike transformer connection - 8 to 24V
AC
, 1.6A
• Primary relay outputs - 24V
AC
, 1.6A continuous; 24V,
2.0A peak
• Auxiliary relay output - 24V
AC
, 1.6A
• Postal lock switch - 12V
DC
, 0.25A
• Lithium backup battery for programming memory
and clock included - lasts up to 10 years
• Speaker impedance: 45
Ω
• Aux output: 11.4 - 12V
DC
, 25mA with 1.2Ah backup
11.4 - 12V
DC
, 200mA with 4Ah backup
NOTE: This output is not suitable to power Door Strikes
• Indoor and outdoor use (for UL & ULC only)
1.4 Additional Devices
• AC or DC style door strikes, magnetic locks, and elec-
tric doors can be used
• A postal lock may be connected (optional Postal
Switch Kit required)
• CCTV board camera (optional Camera Mount Hard-
ware Pack is required)