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1. INTRODUCTION
The BS-746 control keyboard cooperates only with the BS-748 panel and composes a
complete signal numerator panel. The device is used mainly for hotel installations.
Usually the BS-748 main panel is mounted in a place which is not visible (e.g. store,
cupboard) and BS-746 control keyboard is mounted in a place which is visible and has
easy access (e.g. RECEPTION). When a call is issued the the display on the keyboard
shows us the room number that issued the call.
2. PARTS TYPES.
BS-748: DIGITAL SIGNAL NUMERATOR PANEL WITH 48 ZONES
BS-746: CONTROL KEYBOARD UNIT OF SIGNAL NUMERATOR PANEL
3. COMPOSING A COMPLETE SYSTEM
3.1. Systems up-to 48 zones - rooms.
To monitor 48 zones - rooms we must use a BS-746 keyboard and a BS-748
panel(48 zones)These 2 devices are connected to each other with four 4 wires
(fig.1)
3.2. Systems from 49 to 240 zones - rooms.
If we want to expand the zones - rooms from 49 to 240 we have to increase the
number of the panels according to the zones - rooms that we want to cover. For each
48 zones we must use an extra BS-748 panel. Every panel has a different address.
The connection diagram is shown in figure 2.
3.3. System with many keyboards (repeaters).
In many cases it is needed to have a system with many keyboards. For this reason
there are the keyboards - repeaters. Every repeater has a different address. The
connections for this type of system are shown in figure 3.
A
BS-746
Fig1. 48 zones system
BS-746 & BS-748 connections
A
BS-748
230 V AC
230VAC
mains voltage
A
A
921746000_09_003
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