door entry systems????

[paul copeman]

is there any where on this site i can look at the basic workings of door entry systems as it is something i would like to understand how it works

thanks for any help

 

[Evans Electric]

Don't think so Paul, try picking up some literature at the wholesalers or online.

 

[paul copeman]

thanks ill try that

 

[Zeespark]

The NICEIC do courses on it I am led to believe.

AndyGuinness

 

[kerching]

look on Entryphone or BELL Systems site......... :coat

 

[galaxy]

is there any where on this site i can look at the basic workings of door entry systems as it is something i would like to understand how it worksthanks for any help

try these..good kit and support,loads of manuals etc on website

Biometric and Access Control, Door Entry Systems, Audio and Video Entry Kits - Videx

 

[Addictedspark]

Entryphone london will give you manuals on all systems,

Always found them very helpful.

 

[jeff19]

The best company for door entry systems / access control systems are Door Entry Direct Door Entry Direct, door entry systems I have been using them for years, they practically lead the market for that stuff. Hope that helps you, im after an upgrade shortly anyway thanks for reminding me :Applaud

 

[batty]

Welcome to the forum Jeff you don't work for them by any chance?

 

[m4tty]

Welcome to the forum Jeff you don't work for them by any chance?

 

[SLIPSHOD & SLAPDASH]

A standard door entry system works on 5 wires as follows

1) Common

2) RX (receive speech)

3) TX (transmit speech)

4) Call ( buzzer)

5) Lock release

The amplifier for the speech is in the outside station. A power supply to drop the voltage to around 9V DC is normally inside and connects to the outside station. Some units have both AC & DC power.

When a button is pressed outside it connects to 4) in what ever phone was called. The occupied lifts the handset and their speech travels down 3) to the amp. The callers speech travels up to 2). If the occupier presses the lock release button this connects the voltage on the common terminal to 5) which is connected to the lock on the door.

This is a standard arrangement which covers most applications, however more electronics are being used and 2 wire bus systems are getting popular on bigger jobs. Also video is being used more.