Perun AB Operating manual

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Perun
AB
User and installation manual
1. General information
Perun AB is an electronic circuit that protects mechanical switches in your
replica. When installed, high currents used to accelerate the motor are not
directed through contacts, but through specialized MOSF T transistor. It not
only increases reliability but also has a positive effect on the rate of fire as
MOSF Ts have much lower resistivity than contacts.
Besides that, Perun AB allows you to enable or disable active brake mode
(AB), which stops the motor as soon as gearbox cycle ends. This helps by
reducing spring wear.
For Li-Po battery users Perun AB offers Li-Po protection mode that will alarm
you if battery voltage falls to dangerously low levels.
Warranty – 1 year
Allowed battery types:
Li-Po, 2 to 4 cells (7.4V to 14.8V)
NiMH/NiCd, 8 to 10 cells (9.6 to 12V)
Li-Fe, 3 cells (9.9 V)
ATTENTION! The device must never be run without a fuse.

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ATTENTION! Do not leave your replica with the battery plugged in for a
longer period of time more than a few days), because of the risk of complete
battery discharge which will permanently damage the battery).
2. Installation
Put wires together according to the following scheme:
You may shorten the white and red cables already soldered to Perun AB as
needed, but please do not replace them. After soldering the whole wiring
together, use attached shrinktube for insulation.
It is important to carefully follow the scheme above. Any deviations may result
with device failure and warranty loss.

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3. Active brake
Active brake (AB) is a feature, which if activated will stop the motor after
each shot (in semi-automatic mode) or when the trigger is released (in full
auto). This prevents the spring from staying compressed and in case of
replicas with lower muzzle energy and high rate of fire, eliminates possible
double shot problem.
On the other hand, activation of the active brake always leads to increased
wear of motor brushes, as well as its faster heating. We advise to turn AB off
during the game if it is not necessary, and to turn it on just to fire one shot in
semi-automatic mode at the end of the day, so that the spring remains
uncompressed during storage.
Also, with AB deactivated the piston will stop closer to the rear position, so
the next shot will be fired quicker.
In order to turn AB on or off press and hold the button on the device. One
long sound signal will mean that AB has been turned on, three short signals
will mean it is off.
4. Low battery voltage warning
Batteries should never be discharged below certain level. Perun AB has a low
battery voltage warning feature for lithium-polymer batteries (Li-Po). If
activated, after the battery has been discharged to a dangerously low level
Perun AB will signal that by short sound signals recurring every 30 seconds.
Battery’s nominal voltage will be detected automatically.
To activate low battery voltage warning, press and hold the button on the
device. Keep holding the button until the second sound signal is heard. The
first signal will be for the AB, as described above, the second one will be for
Li-Po protection. One long sound signal will mean that protection is on, three
short signals will mean it is off. AB setting will be changed after this, so you
will have to restore previous AB setting.