Maxsys PC4020 User manual

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PC4020 Design Notes TABLE OF CONTENTS
Page
Section 1 - System Overview
1.0 Introduction..................................................................................................................3
1.1 Terminology................................................................................................................. 3
1.1.1 Modules...........................................................................................................3
1.1.2 Enrolling ..........................................................................................................3
1.1.3 COMBUS.........................................................................................................3
1.1.4 Partitions..........................................................................................................3
1.1.5 Common Zones...............................................................................................4
1.1.6 Downloading ...................................................................................................4
1.1.7 512 Event History Buffer .................................................................................4
1.1.8 Programming...................................................................................................4
1.2 Parts List...................................................................................................................... 4
1.3 Additional Accessories................................................................................................5
1.3.1 LCD4500 Module - LCD Keypad....................................................................5
1.3.2 PC4108 and PC4116 Modules - Zone Expanders..........................................5
1.3.3 PC4204 Module - Power Supply/Relay Outputs.............................................5
1.3.4 PC4216 Module - Low Current Output Module ..............................................5
1.3.5 PC4400 Module - Printer Output.....................................................................5
1.3.6 PC4600 and PC4650 Modules - Graphic Annunciator Kits ...........................5

PC4020 Design Notes
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Page
Section 2 - Installation and Wiring
2.0 Suggested Installation Procedure ..............................................................................7
2.1 Step 1 - System Layout .............................................................................................. 7
2.2 Step 2 - Calculate Product Required - Current Required .........................................8
2.3 Step 3 - Calculate Power Requirements.................................................................... 8
2.3.1 Calculate Current Required ............................................................................8
2.3.2 Advantages in Determining Line Loss............................................................ 8
2.3.3 How to Determine Line Loss...........................................................................9
2.3.4 Step by Step Procedure for Calculating Line Loss ........................................9
2.3.5 Step by Step Example of Calculating Line Loss ..........................................10
2.3.6 Locating PC4204 Modules/Correcting Line Loss Problems........................ 13
2.3.7 Base Number Chart ......................................................................................13
2.3.8 Power Units Chart .........................................................................................14
2.3.9 Power Unit Calculation Chart - Distance vs Base Number ..........................14
2.3.10 Line Loss Calculation - Second Method.......................................................15
2.3.11 Final Line Loss Test ......................................................................................15
2.3.12 When to Perform Line Loss Calculations......................................................15
2.4 COMBUS Power .......................................................................................................15
2.4.1 How to Wire the PC4204 for COMBUS Power ..............................................16

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PC4020 Design Notes SYSTEM OVERVIEW
SECTION 1
1.0 Introduction
The PC4020 is a highly flexible and versatile control which will enable the installer to meet the
most demanding security requirements. The heart of the system is the main control panel, desig-
nated the PC4020, which is connected to other system elements using common 4 conductor
unshielded station wire. A few of the features available are:
• up to 128 zones (with the addition of zone expansion modules)
• 128 - 4 digit or 6 digit user codes with individually programmable system access
• 8 individual, fully programmable partitions
• 3 keypad Panic zones on each keypad
• 3 programmable voltage outputs on the main board (PGM, SW AUX and Main Bell Output)
• expandable up to 64 fully programmable relay outputs
• expandable up to 144 fully programmable low current outputs
• full upload/download control using an IBM PC and Hayes (TM) or Practical Peripheral 1200
baud modem
• 512 event buffer, time and date stamped which can be printed on premises or retrieved with
the DLS software
1.1 Terminology
1.1.1 Modules
Every keypad, zone expander, power supply/relay board, low voltage output board or printer
output board is a module. Before any module will operate properly it must be enrolled to the
system. Once a module is enrolled the panel will communicate with it via the COMBUS and the
module will function properly.
1.1.2 Enrolling
Enrolling is the term used for adding a module to the system. When the PC4020 is first powered
up it is not aware of any module connected. The first keypad you press a key on will automatically
be enrolled to the system as keypad 1 assigned to Partition 1. Once the first keypad is enrolled
you can enter Installer’s Programming and enroll any additional modules that are to be connected
to the system.
1.1.3 COMBUS
The COMBUS (Communications Bus) is the 4-wire cable to which all the modules are connected
in parallel. The main panel uses the COMBUS to communicate with all modules on the system. To
allow the panel to distinguish between the various modules each has a unique 16 bit address
programmed at the factory eliminating the need for setting DIP switches.
1.1.4 Partitions
A partition is a defined areas which will operate independently from other areas of the system. Up
to 8 partitions can be defined each with a variable number of zones and user codes assigned to
it. In addition, features may be enabled or disabled for each partition individually.
For example: Partition 1 of a system could have 20 user codes, have zones 5, 6 and 12 assigned
to it and be programmed to auto arm at 6:00 pm.

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Partition 2 of the same system could have 5 user codes, zones 7 through 16 and be programmed
to auto arm at 7:30 pm.
Partition 3 of the same system could have 1 user code, zones 1 through 4 and not be pro-
grammed for auto arm.
It is important to remember when programming that if the system does not require multiple
partitions the system will be considered partition 1.
1.1.5 Common Zones
Common zones are those zones that are assigned to two or more partitions. In the above example
zone 12 is common as it is assigned to both Partition 1 and Partition 2. Common zones are only
armed when all partitions they are assigned to are armed. If a common zone is violated when it is
armed, disarming any partition the zone is assigned to will disarm the zone. This can be useful
when there is a common entry point to two or more partitions.
For example, an office building with 4 doctor offices may have a common reception area. The
zones in the reception area would be common to the 4 office partitions.
1.1.6 Downloading
The PC4020 is fully upload/downloadable with the use of an IBM PC (or compatible) and a Hayes
1200 baud modem. The DLS download software can be used to program all installer’s areas, user
codes, retrieve the 512 event buffer and perform system diagnostics.
1.1.7 512 Event History Buffer
The PC4020 control has a built in 24 hour clock and calendar which allows the system to time and
date stamp all events that occur on the system. These events are stored first in, first out to a 512
event buffer. The event buffer may be retrieved using the DLS download software or may be
printed on site with the addition of the PC4400 RS232 module. If printed on site the panel will use
the zone labels, user code labels and partition labels that you have programmed.
1.1.8 Programming
The PC4020 uses a new menu driven program method that makes programming the system
simple. All programming is easily done via the keypad, no programmers or special hardware are
required. Menu flow charts are provided with the installation manuals so that you may quickly
move through the different program areas.
1.2 Parts List
You should find the following equipment included in your system. Verify you have all the various
components:
• one PC4020 large control cabinet (PC4001C)
• one PC4020 main board
• one LCD4500 liquid crystal display keypad
• one hardware package

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PC4020 Design Notes
32 5.6K EOL resistors
1 black cabinet plug
1 green ground strap
1 Toroid
• one set of four PC4020 installation books and two end user instruction manuals.
1.3 Additional Accessories
Additional keypads and other modules can be added to the PC4020 to provide additional zones,
additional outputs and additional power. The following is a brief description of the modules that
can be connected to the PC4020.
1.3.1 LCD4500 Module - LCD Keypad
Programming and system operation is carried out using the LCD4500 liquid crystal display
keypad. A maximum of 16 keypads can be connected to any PC4020 control panel.
1.3.2 PC4108 and PC4116 Modules - Zone Expanders
The basic 16 zone capability of the PC4020 can be expanded using either PC4108 or PC4116
modules which provide 8 or 16 additional zone inputs respectively up to a system maximum of
128.
1.3.3 PC4204 Module - Power Supply/Relay Outputs
The PC4204 relay output module is available for installations requiring additional power beyond
the 500 mA provided by the PC4020 main board. Each module provides a powerful 1.5 Amp, 12
volt DC power supply and requires a separate transformer, 16-18 volt, 40 VA and a 12 volt bat-
tery. A maximum of 16 PC4204 modules can be connected to any PC4020 control panel to
provide additional power for modules, devices or siren outputs.
1.3.4 PC4216 Module - Low Current Output Module
The PC4216 low current output module provides 16 voltage outputs, maximum 50 mA current
draw. Each output can be programmed to activate for any of the 28 programmable output options
noted in the Programming Manual. In addition any module can instead be programmed to follow
the alarm or zone status of any group of 16 zones. A maximum of nine PC4216 modules can be
connected to any PC4020 control panel.
1.3.5 PC4400 Module - Printer Output
The PC4400 modules provides the capability of driving a serial printer on site. Only one of these
modules may be connected. The serial printer can be located a maximum of 200 feet from the
PC4400 module.
1.3.6 PC4600 and PC4650 - Graphic Annunciator Kits
Two graphic annunciator kits are available for the PC4020, PC4600 and PC4650. The PC4600 can
be used to display up to 32 zones, the PC4650 up to 64. The outputs to drive the LED’s are
obtained through the use of PC4216 modules, each of which can drive up to 16 LED’s. The LED’s
can be programmed to light when a zone is violated, latch in a zone in alarm or a combination of
both.

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Note

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PC4020 Design Notes
INSTALLATION AND WIRING
SECTION 2
2.0 Suggested Installation Procedure
The first step in designing a PC4020 installation is developing a System Layout on paper. Doing this
will allow you to work from a plan and help avoid making mistakes and make programming easier.
2.1 Step 1 - System Layout
[1] Layout
Draw a rough sketch of the building(s) in the installation including inside walls if necessary. This will
be the base from which to work. Indicate on the diagram the location of the PC4020 main panel.
[2] Zones and Expansion Modules
Mark all zones that will be required including all doors, PIRs, smoke detectors and glassbreak
detectors etc.
Locate any zone expansion modules (PC4108 and PC4116), if required, close to groups of
zones to provide easier wiring of the devices.
[3] Zone Assignment
Decide on the order to enroll the expansion module(s) so that each zone can be given a zone
number. The first 16 zones on the system are on the main panel. As each expansion module
is enrolled it will be assigned in sequence the next group of available zones. If an 8 zone
expansion module was enrolled first, it would be assigned zones 17-24. If then a 16 zone
expansion module was enrolled it would be assigned zones 25-40.
[4] Partitions
Indicate each partition by boxing the area of the partition on the diagram. This will allow you
to quickly determine which zones will have to be assigned to each partition.
[5] Keypads
Each keypad on the system must be assigned either as a Partition or a Global keypad. A keypad
assigned to a partition will only allow full operation of the partition. A Global keypad will allow full
operation of any partition on the system. Indicate on the diagram the location of all keypads
required. Also indicate if the keypad will be assigned to a partition or if it will be a Global keypad.
[6] Sirens
Siren outputs can be programmed to activate if one or more partitions go into alarm. The main
panel provides one output (the Main Bell Output) for this purpose. Additional siren outputs
can be obtained from PC4204 power supply/relay output module(s). Each PC4204 module
has 4 Form ‘C’ relays, 3 of which can be used as siren outputs.
The PC4204 module can supply up to 1.5 amps of current. If any PC4204 module is being
used to power siren outputs the total current draw when all outputs are active cannot
exceed 1.5 amps. Note: If the hardware revision of the PC4204 circuit board is Rev 08,
additional current (up to 5 Amps total) can be temporarily drawn. This additional current is
supplied by the battery and should not be drawn for an extended period of time.
Indicate on the diagram the location of all sirens and which partition(s) will activate them. If
more than one siren output is required also locate PC4204 module(s) where needed.
[7] COMBUS
The COMBUS is the four conductor cable which can be standard station wire (four 22 AWG
wires colour coded red, black, yellow and green) to which all system modules are connected
in parallel. The modules do not have to be home run to the control panel.
Draw the COMBUS on the diagram. Keep in mind the maximum distance in wire a module
can be from the main control is 1000 feet (305 m).

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2.2 Step 2 - Calculate Product Required - Current Required
From the system layout just completed indicate the number of each module and detectors required
for the installation. Also indicate the total current required for the number of devices connected .
Quantity Required Current Draw
_________________ LCD 4500 Keypads @ 50 mA each _________________
_________________ PC4108 Modules @ 30 mA each _________________
_________________ PC4116 Modules @ 40 mA each _________________
_________________ PC4204 Modules @ 30 mA each _________________
_________________ PC4216 Modules @ 30 mA each _________________
_________________ PC4400 Modules @ 30 mA _________________
_________________ Motion Detectors @ 20 mA each _________________
_________________ Glassbreak Detectors@ 20 mA each _________________
Others _________________
Others _________________
Total Current Draw _________________
2.3 Step 3 - Calculate Power Requirements
2.3.1 Calculate Current Required
The main panel can provide up to 500 mA of current. Each PC4204 connected to the system can
provide up to 1.5 Amps. If the total current required by the system (See - CALCULATE PRODUCT
REQUIRED - CURRENT REQUIREMENTS - Section 2.2) exceeds 500 mA you will require at least
one PC4204 module for additional current. If the current required exceeds 2 Amps you will need
at least 2 PC4204 modules.
The Main Panel can provide 500 mA of current for modules and devices. If the system requires
more than 500 mA at least one PC4204 module will be required.
2.3.2 Advantages in Determining Line Loss
By determining if line loss is a problem with your design BEFORE you install the job you will be
better able to correct the problem in advance. It may be found that running the COMBUS in a
different manner or using a thicker gauge wire could correct the problem without the addition of a
PC4204 module.

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PC4020 Design Notes
If line loss is determined to be the problem with a job AFTER it is installed you will normally be
left with one option, the addition of a PC4204 power supply module. The additional cost of the
module and the time required to troubleshoot the system can be avoided by doing the
calculations ahead of time.
2.3.3 How to Determine Line Loss
You may find that the system does not require a PC4204 module for additional current if your
system is not too large. However your system may still require a PC4204 power supply module if
the line loss on the COMBUS is excessive.
Line loss is one of the most common cause of problems we have found. The following is a simple
and quick method for determining if the line loss on the COMBUS will require the additional of one
or more PC4204 modules.
2.3.4 Step by Step Procedure for Calculating Line Loss
Step 1 - Draw a block diagram of the system including all modules and the COMBUS wire runs
to these modules.
Step 2 - Find out how many Power Units are available for the gauge of wire used (See - POWER
UNITS CHART- Section 2.3.8). If different gauge wires are used throughout the system
these calculations will not work. If this is the case use the second method. (See -LINE
LOSS CALCULATION - SECOND METHOD - Section 2.3.10.)
Step 3 - Find out the distance of wire of each run of the COMBUS. Round up to the nearest 50'.
THIS IS THE MOST IMPORTANT STEP! IF THE DISTANCES ARE INCORRECT THE
CALCULATIONS WILL BE WRONG!
Step 4 - Indicate if any devices that require power (PIR, glassbreak, LED’s, relays etc...) other
than those connected to the AUX of a PC4204, the module they will be drawing power
from and the current required for these devices.
Step 5 - Write down for each module the base number indicated (See - BASE NUMBER CHART -
Section 2.3.7). Don’t forget to add to the Base number if additional devices requiring
power are connected.
Step 6 - Calculate how many Power Units will be required for each module of each branch of the
COMBUS. (See - POWER UNIT CALCULATION CHART - Section 2.3.9.)
Step 7 - Starting with the Power Units number determined in Step 2 for each branch, subtract the
Power Units required by each module.
Step 8 - If any branch of the system falls below 0 Power Units a PC4204 module will be required.
Depending on the size of the system, it shouldn’t take too long to calculate if line loss is excessive
on the system and could help save hours of troubleshooting time.

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2.3.5 Step by Step Example of Calculating Line Loss
The following is a step-by-step example of calculating line loss on a system.
Step 1 - Draw a block diagram and the COMBUS.
Step 2 - Find out the gauge of wire.
This example has 22 gauge wire and therefore 80 Power Units.
Step 3 - Indicate the distance of each COMBUS wire (in feet). Make sure you round up to the
nearest 50' increment.