Tunstall FlamencoIP Technical Manual page 54

9. Activating the power supply
Test the voltage and determine the room terminal (ComTerminal Flamenco,
RoomTerminal Flamenco, ControlTerminal Flamenco or ControlTerminal with door-
plate Flamenco) with the lowest voltage. This point is considered as the electric cen-
tre of the ring circuit. Here, the voltage differential to the first room terminal as seen
from the power supply unit must not be greater than 4 V.
If you should read a lower value (i.e. a drop of more than 4 V) the voltage drop must
be reduced by laying an additional cable from the power supply unit to the electric
centre - or double the 0 V lead - if it is available.
Power
supply
unit
Check voltage for OSYnet group bus
9.2.4
If the OSYnet group bus is correctly connected: voltage between DH and DG and
voltage between DL and DG = approx. +2.5 V.
9.2.5 Check RAN voltage
RAN voltage is o.k. when voltage between B (0V) and Y (RAN) is between +8.8 V
and +9 V DC. If the voltage is outside of these parameters, these may be the rea-
sons:
If voltage between B (0V) and Y (RAN) = 0 V
a) Short circuit between B and Y.
b) Wire Y (RAN) is not connected to the terminal.
If voltage between B and Y = +12 V
a) Wire B (0V) is not connected at one of the RAN users.
b) One RAN user is defective.
52
Ip
Ip
electric
centre
IP
Flamenco - Technical Manual - 00 8813 52, 03/18 (Rev. 1.0)