Karel MS26S, Инструкция по установке и обслуживанию, Страница: 13 / 62

Karel MS26s Installation & Maintenance Guide
Edition 3.1
7
I.2.B. POWER FAILURE TRANSFER STATIONS
In case of power failure the stand-by battery backup allows the system resume
operation without any interrupt.
In case there is no battery connected to the system when the power goes off, the
lines 1 and 2 are automatically connected to extensions 11 and 12, respectively.
See the following figure illustrating the power failure transfer stations of MS26s
system.
Figure A-6
I.3. EXTERNAL MUSIC CONNECTOR
Any external music source (tape recorder, radio or CD player) can be connected to
the system to be used for background music facility and to be transmitted to the
parties parked or put on hold. This connection is established via the 2-pin MUS
connector on the MB26s motherboard.
I.4. EXTERNAL RELAY
An external relay which is rated for 250 VAC - 24 VDC at a maximum current of 2 A
exists on the system motherboard to be used to activate either a door opener or an
external ringer. The connection to the external relay is established through the 2-
pin XREL connector on the MB26s motherboard. The selection among these
devices is made by programming.