Karel MS26S, Инструкция по установке и обслуживанию, Страница: 58 / 62

Karel MS26s Installation & Maintenance Guide
Edition 3.1
50
Figure B-24
•
C
ABLING
:
During the installation of the FPBASE/SPBASE and FPEXP/SPEXP units, it is
very important to connect the grounds of all the units to the mains ground of
the building. For that there is a special connector on the metal base of
FPBASE/SPBASE,
which is to be attached to the mains ground. This ground
is carried to the FPEXP/SPEXP units by way of the two washers and a brass
card holder (see Figure B-31).
It should be noted that the directions of the line / extension connections are
also important. The system side of the card is marked with “PABX" and the
external line (or far extensions) side is marked with “PTT" on the card (see the
following figure).
Figure B-25
To get the utmost benefit from FPBASE/SPBASE and FPEXP/SPEXP units
against lighting, the units should be installed 20 meters away from the system.
This need not be the physical distance but the length of the cables between
the system and the units.