The access control system
2-5
4101-2 Modular Controllers
Each controller is housed in a metal case with removable cover and
internal chassis for ease of installation and maintenance.
The chassis carries a motherboard and provides slots for five modules
plus a 4210 RF Module for proximity cards.
0
2
4
6
89
1
3
5
7
LEDs
Module
slots
Case Motherboard Chassis
Memory
expansion
connector
Tamper
switch
The motherboard has a microprocessor circuit which manages the
modules, takes access control decisions and communicates with the
host computer. It also has enough RAM to retain all the access
control data needed for up to eight access points and 13,000
cardholders. An expansion connector for the 4105-2 Memory
Expansion Module enables the RAM to be increased to store up to
77,000 cards.
The 4210 RF Module is used in any 4101-2 Controller which also
contains Cotag reader modules. It occupies its own slot at the bottom
of the controller, smaller than all the other slots. If a controller is not
being used for Cotag readers (either because swipe cards are being
used or because the controller is only handling inputs and outputs)
then it does not need the RF Module.
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