Manual FältCom ECII SE Eng
Page 16 of 36
6.5.4 Connection via existing cable
Warning! Make sure there is no 230–400 V in cables that you will have contact with.
Normally, the existing lift cable (usually a big flat conductor cable) goes to a cage cable box,
where you may find unused wires (if any) that can be used for the lift phone. It is important
that the used wires are next to each other in the lift cable to minimize disturbances. In case of
bad sound quality a separate cable must be used.
1.
Connect a two-wire cable from the unused pair in the cage cable box and draw the
cable to the terminal strip marked ”TELE”.
2.
Fasten the cable with cable ties or cable clips on the outside of the lift near the lift
phone.
3.
Connect the suspension cable wire to the telephone jack in the engine room. Mark
the connection so that it will not be removed by mistake.
6.6 Connection of voltage feed
Note that separate voltage feed is only required if more than one lift phone will be connected
to the same telephone line or if single-mounted to a line voltage below 32 VDC, usually an
internal telephone exchange (PABX). This limit is possible to decrease in case of a single
mounted lift phone by mounting the attached jumper marked “J1” next to the green screw
connector. Then the lift phone can be used without a separate power supply down to 22 VDC.
Note that when the jumper is mounted it is
not allowed
to connect the lift phone to the public
switched telephone network (PSTN) but only to a PABX. See also section
Technical Data.
The voltage feed must come from a source that will work even in case of a power failure, e.g.
the lift’s emergency light system, and must go via a special DC/DC converter. This converter
is galvanically separated from ground, which is necessary in order to avoid disturbing the
telecom station. If no existing emergency power supply is available a separate emergency
power source with a built-in battery can be used. Contact your local distributor for more
information.
1.
Connect a two-wire cable to the existing suspension cable wire for emergency
lighting. Measure to verify the correct voltage between the pins.
2.
Connect the cable to the DC/DC converter’s input.
3.
Connect the DC/DC converter to the lift phone outlet marked ”DC”.
4.
Screw the DC/DC converter on the outside of the lift and fasten the cable with cable
ties or cable clips.
When connecting two or more lift phones on the same telephone line, each phone shall be
programmed for detection of occupied line:
To deactivate this function, press: