Bosch K2200 Series Guia de Instalação descarregar pdf (Página 34)

K2200 Series | Installation Guide | 5.0 Installation Details EN | 34

Bosch Security Systems | 7/03 | 17375 1.3 / 46513C

5.4.3 Request to Exit (DR2)

Wiring Detail

Figure 19: Request to Exit Wiring Diagram

GND

DR2

N/O

Request to Exit

Door

Controller

Connecting DR2 to ground (GND) will always

operate the lock; ensure that the request to exit

wiring is not accessible from outside the secure area

(e.g. if the reader is removed from the wall, the

request to exit wiring should not be exposed).

The Request to Exit switch allows persons within the

secure area to leave by signaling the door controller

to operate the lock without using a key. The switch is

necessary when door monitoring is used (see Section

5.4.4 Door Monitoring (DR1)) to enable the controller

to distinguish between a forced door and a valid exit.

The switch should be 'normally open' which closes

momentarily when pressed.

The following should be noted:

• It is possible to locate the switch away from the

door, at a reception desk or as part of a door

entry system. In which case, it is possible to

change the event report to Request for Entry.

• More than one switch can be used if wired in

parallel.

• If an attempt is made to keep the door open by

holding down the Request to Exit switch then the

door will lock after 5 cycles of the lock release

time and an RTE Button Held Down report is

produced.

5.4.4 Door Monitoring (DR1)

Wiring Detail

Figure 20: Wiring for Door Monitoring

Door Monitoring

The door controller has the ability to monitor a door

contact allowing:

• Unauthorized Access Alarms giving warning of

a forced door.

• Door Left Open Warning after a set period of

time. The time is set when the controller is

programmed.

Cancellation of Lock Release Time allows the

door to lock after someone has passed through even

though the lock release time has not expired

Door Contact

The door contact should be a normally closed switch

that is open whenever the door is open. Care should

be taken when fitting door contacts to ensure that

they operate only when the door is opened and close

only when it is secure again.

To help prevent false alarms:

• Keep reed switches away from large magnetic

fields, such as those generated by magnetic locks.

This is a particular problem with metal door

frames.

• Ensure that the switch does not operate if the

door moves in its frame, in draughty or windy

conditions.

An efficient door closer should be fitted that secures

the door once someone has passed through.

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