2
S e c t i o n 2
2.1 Plan Your Installation
When designing a security system with access control it
is best to first lay out the system on paper. This will help
determine the total number of zones, additional expanders,
access control points and other system components that
will be required to complete the installation.
When the location of all points of access are known,
appropriate points may be chosen for access control. When
working from the layout, be sure to locate the PC4820
module so that the wire runs from each door will be as
short as possible.
When deciding the placement of the access points and
module, remember to check the capacitance limit for the
wire you are using for the Combus. Follow the steps
outlined in your PC4010/4020 v3.0 Installation Manual
(Section 2.4 “Capacitance Limits”).
NOTE
: Do not run the Combus to the PC4820 in shielded
cable.
2.2 Installation Steps
Once the location of the PC4820 and each access point is
determined, follow the installation steps outlined below.
1 Installation of PC4820 and accessories:
The PC4820 controller cabinet has been designed for
surface mounting. The cabinet is large enough to
accommodate the battery backup supply and the
necessary wiring connections for most applications.
The cabinet should be mounted indoors, in a dry,
secure location providing normal temperature,
humidity levels and access to an earth ground
connection. The location should be easily accessible
for servicing the equipment, and it is recommended
that each PC4820 module be near the doors it controls.
If the PC4820 is within the Access controlled area, keys
for the controlled doors must be made available so
that the PC4820 can be accessed for servicing.
Connect the various devices for each access door
according to the diagram below:
A. Access card readers should be located 107cm (42")
from the floor.
B. Connect door strikes using standard 18-gauge cable.
Recommended door strikes are electric “Continuous
Duty” devices which, when power is cut, will remain
in a locked or “secured” state. When using magnetic
locks, follow local regulations on the use of these
devices.
CAUTION
– Local regulations may prohibit “Lock on
Power Failure” if the door is used as a Fire Escape route.
C. Door contact must be hardwired directly to the PC4820.
Wireless or addressable contacts
may not
be used.
D. Install a T-REX exit detector and door alarm (optional)
inside of the protected area. (See T-REX Installation
Instructions for details on wiring and proper
mounting locations.)
2 Tamper protection
A tamper switch may be installed on the cabinet to
protect it from unauthorized entry. The normally
closed tamper switch is connected to the TAMP and
GND (on right side of the PC4820). If the tamper
switch is not used, the TAMP terminal must be
terminated to any GND terminal with a wire.
3 Connect all inputs, outputs, door locking
devices and card readers
Follow the instructions outlined in the sections
below for installing each type of device.
4 Power requirements
Install a 16-18V
AC
/40VA transformer outside the
cabinet. Connect the red battery lead to the positive
terminal and the black battery lead to the negative
terminal.
NOTE
: Do not apply power until all wiring is complete.
Both the AC and battery connections must be made in
order for the PC4820 to function properly.
Connect
the battery before connecting the AC.
2.3 Inputs – POST, ARM and REX
The door inputs are capable of following any type of
supervision. Choose the end of line configuration (Normally
Closed Loops, Single End of Line or Double End of Line)
which you have selected for the rest of the security system.
The POST, ARM and REX inputs are for Auto-arm
postponement, Arming buttons and Request to Exit
devices, respectively. These inputs will only be capable of
Normally Closed Loops or Single End of Line resistors.
When using Double End of Line supervision, these inputs
must only be wired for Single End of Line configuration.
Please see section 3.5 “Zone Assignment for Access Doors”
for information on door input zone programming.
POST Inputs
When enabled, this PC4820 input allows postponement of
Autoarm of the PC4010/4020 for the partitions selected in
Installation and Wiring
To PC4820 Access
Control Module (See
Access Control
Module Wiring
Diagrams for details)
B
C
D
A
