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15
Using a supplementary power supply
When on one signal line
more than 8 monitors
are installed, a supplementary PSU is advised.
This extra PSU is installed at the end of the BUS-line
to guarantee that the required tension
does not go below 23V DC
.
Before installing a supplementary PSU it is important that one measures the tension on
the BUS when a monitor is communicating with a door station. Define polarity of the
wires and respect the polarity when installing;
connect the positive from the supplementary PSU with the positive from the BUS-line.
Remove jumper CN2 on the
supplementary PSU
