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MICROgarde controller I and II
04.20.11.18
Overview
1.2.1
Access Control
Each person who is to be allowed access is given a card (or key fob) with a unique number.
When the card is presented at a reader next to a door, the number is read and transmitted to
the MICROgarde controller to which it is connected. If that number is in the memory of the
controller, with permission to enter the door at that time, the controller operates a relay
which in turn unlocks the door for a pre-set number of seconds. The controller also records
the event, which is sent to the software event trail and logging.
EXgarde software is used to set up a system of up to 200 MICROgarde controllers. Once
the system is set up, the software can be closed down if required because each controller
contains all of the valid card numbers together with all the rules that govern access.
The software will also retrieve and display events as they happen. If events have occurred
while the software has been closed down, the software will retrieve them when re-started. If
a controller records 1000 events (programmable) while it is off-line, then the oldest event is
discarded to make room for each new event.
1.2.2
Doors and readers
There are 2 main types of MICROgarde controller: MICROgarde I and MICROgarde II.
MICROgarde I is a 1 door controller with 1-2 readers.
MICROgarde II is a 2 door controller with up to 4 TDSi readers or two non-TDSi readers.
A door can have a reader on both sides of the door. Because a card holder is given
permission (courtesy of his or her access level) on a reader-by-reader basis, a card may be
allowed access through a door in one direction only if required. Where a reader is fitted on
one side of the door only, opening the door from the other side may require the fitting of
suitable door hardware or an exit button.
1.2.3
Inputs and relays
You can reduce the number of doors controlled by a MICROgarde and thus use the spare
relays and inputs for monitoring other devices. An optional board can be added to each
controller that adds 4 more spare inputs and 2 relay outputs.
If required a MICROgarde can be programmed to be pure I/O and not used for reader and
door. A MICROgarde II with an I/O board fitted would provide 4 spare relays and 8 spare
inputs in total.
An input can be connected to another device that contains (or behaves like) a switch. For
example, a contact fitted to a window frame could be connected so that you could see in the
EXgarde software whether the window was open, and also see the times of opening and
closing.
A relay can be connected to another device for the purpose of turning it on and off in the
following ways:
From an instruction by the Operator using the software
Automatically when an input is switched on and off
Automatically according to a pre-set time pattern