PERUN AB++ On-Wire Mosfet User Manual
- June 3, 2024
- PERUN
Table of Contents
PERUN AB++ On-Wire Mosfet
Technical data
Recommended power sources
Perun AB++ works with any power source that provides voltage between 7 and 17
volts and can deliver enough current to ensure smooth cycling of the replica.
Li-Po and Li-Ion batteries with nominal voltage of 7.4, 11.1 or 14.8 volts are
recommended. It is also advised to use batteries with possibly high “C”
parameter and capacity. This is safer for the battery, as it should not be
working on the edge of its capability. In this video, we are showing why:
https://www.youtube.com/watch?v=s8RKcIy810A
Capacity and „C” parameter also influence the rate of fire of the replica:
https://www.youtube.com/watch?v=5hO25aPvHcU
Compatibility with high-ROF and high-power builds
Perun AB++ can work with even the most demanding setups, both regarding rate
of fire and muzzle velocity.
Electronic fuse
Perun AB++ has an integrated electronic fuse, which will automatically cut the
power off in case of a short circuit or when a gearbox jam is detected. The
fuse does not wear out and does not need to be replaced.
Battery connector type
Perun AB++ comes with an already soldered T-Plug connector.
Installation
Perun AB++ can only be installed by experienced technicians! Perun is not liable to damages to replica or electronics caused by improper installation. To install the unit:
- Remove previous wiring.
- Cut motor wires (thicker ones, red and black) to needed length and solder motor connectors.
- It is imperative to put heat shrink tubes on the connectors and then shrink them using hot air or by cautiously placing them some distance over an open fire.
- Cut signal wires (thinner, red ones) to needed length and solder them (in any order) to trigger contacts and to the positive motor wire (red). Isolate this connection with a heat shrink tube.
We do not recommend soldering on the unit itself unless it is absolutely
necessary!
Features and programming
To enter the programming mode, press the button on the device 2 times. First
push activates the button, which is signaled by LED starting to glow green.
Quick second push shortly after the first leads to the programming mode.
Successful entry into the programming mode will be confirmed by a sound
signal.
Pressing the button will switch the modes, while pulling the trigger allows to
enable, disable, or set levels for the modes. Full feature description
| Function and LED | Description |
|---|---|
| Burst Green | When this mode is enabled, a 2 to 5 round burst is |
available instead of fully automatic fire.
No sound signal while LED glows green means, that the burst is off. 2 to 5
signals indicate 2 to 5 round bursts accordingly.
This burst is based on motor current measurements, which is one of few
methods of cycle detection in non-drop-in mosfets. It may not work perfectly
in all replicas, resulting
_ _in different number of shots fired in burst than programmed.__
AB
Blue
| Active brake (AB) stops the motor after the shot, preventing the spring
from remaining in a compressed state and eliminates double shots on semi in
replicas with high rate of fire (“overspin”). 5 levels of braking strength are
available – from 1 (weakest braking) to 5 (the strongest). Braking can be also
completely disabled. It is advised not to use braking all the time, if not
necessary, or to use it on the lowest possible level, because strong braking
negatively impacts the service life of motor brushes and causes increased
heating.
Tip: Set your replica to semi, press, and hold the button on the
unit, then pull the trigger. This will cause a single shot with strongest AB
setting to be fired, making sure the main spring remains uncompressed. It is
advised to do that when you finish shooting for the day.
No sound signal while LED glows blue means, that the active brake is
disabled. 1 to 5 signals indicate braking levels from 1 (the weakest) to 5
(the strongest).
While precocking is on, the AB setting becomes irrelevant. However, any
programmed AB setting will be stored in memory and will become effective as
soon as precocking is disabled.
Function and
LED color
| Description
---|---
Precocking
Yellow
| When shooting on semi, precocking keeps the piston in rear position, ready for a shot. This decreases the time between pulling the trigger and the actual shot, increasing realism, and giving advantage in CQB fights. Precocking level must be set so, that the piston remains around 1,5 cm from the rearmost position.
Tip: To release the spring after using precocking, set your replica to semi, press, and hold the button on the unit, then pull the trigger. This will cause a single shot to be fired with strongest AB setting, making sure that the main spring remains uncompressed. It is advised to do that when you finish shooting for the day.
No sound signal while LED glows yellow means, that the precocking is disabled. 1 to 8 signals indicate precocking levels from 1 (the weakest) to 8 (the strongest).
In replicas with standard contacts, precocking works only on semi!
AB setting does not affect the functioning of precocking, it is ignored if precocking is enabled.
ROF
reduction White
| This function allows to lower the rate of burst or automatic fire. 5 reduction levels are available:
1 – 6% ROF reduction
2 – 12% ROF reduction
3 – 18% ROF reduction
4 – 24% ROF reduction
5 – 30% ROF reduction
These are approximate values and may vary depending on replica configuration.
No sound signal while LED glows white means, that the ROF reduction is disabled. 1 to 5 signals indicate reduction levels from 1 (the smallest) to 5 (the greatest).
Semi-automatic shots and the first shot in burst are always fired without any power reduction to retain good trigger response.
DMR mode
Purple
| DMR Mode limits the frequency of semi-automatic shots or increases minimal intervals between bursts. Its main use is in high power, DMR-styled replicas on fields, which demand such limitations. 0.25s, 0.5s, 1s, 2s and 3s intervals are available.
No sound signal while LED glows purple means, that the DMR mode is disabled. 1 to 5 signals indicate interval levels from 1 (the shortest) to 5 (the longest).
Li-Po and Li- Ion alarm
Teal
| Li-Po and Li-Ion alarm informs the user, that the battery voltage has fallen below 3.7V per cell, at which the battery should not be further used and must be recharged. Unit automatically detects number of cells in the battery and determines safe voltage range. The need for battery replacement is signaled by short sound signals every one minute.
Disable this function if you are using batteries other than Li-Po or Li-Ion.
No sound signal while LED glows white means, that the alarm is disabled. 1 signal indicates activation of the alarm.
Master reset
Red
| Master reset returns the unit to factory settings.
To reset, pull and hold the trigger for 2 seconds. A long sound signal confirms return to factory settings.
Factory settings
New units and units where master reset was activated will have modes set in a following way:
- Burst – disabled
- AB – level 3
- Precocking – disabled
- DMR Mode – disabled
- ROF reduction – disabled
- Li-Po and Li-Ion alarm – enabled
Troubleshooting and diagnostic system
Perun AB++ has a diagnostic system that will help you find the source, should
you encounter a problem. After the battery is connected, the unit undergoes a
start-up check, to make sure the replica is ready to work. Successful
completion of this check is indicated by a short green blink of the LED.
Diagnostic system can inform the user about following problems:
| Problem and LED color | Description |
|---|
Disconnected motor / Contacts check
Yellow, blinking
| This not only provides information about disconnection of the motor, but it is also a diagnostic mode for the trigger and the button on the device. With disconnected motor, pulling the trigger or the pushing the button will cause the LED to glow purple (trigger) or green (button). This can be used for troubleshooting problems with the replica or the electronics.
Reconnecting the motor will restore normal functioning of the unit.
Motor check only takes place at start-up. A disconnection after the start-up will not be signaled!
Fuse activation
Red, continuous, or blinking
| Activation of the fuse with a distinction between a short circuit
(continuous red) and gearbox jam (blinking red). In some situations, this
distinction may not be correct, for instance a gearbox jam may be incorrectly
read as a short circuit and vice versa.
Unit will start functioning normally after the battery is reconnected, unless
there still is a short circuit that will be detected at next start-up.
Trigger pull detected during start-up
Yellow and purple blinking alternately
| Unit detected that the trigger was being held during start-up. This can also indicate a short circuit of the signal wiring or mechanical malfunction of the trigger mechanism.
Unit will start functioning normally after the trigger is released.
Button on the unit was pressed during start-up
Yellow and green blinking alternately
| Button on the unit was pressed during the start-up.
Unit will start functioning normally after the button is released.
Problem and LED color| Description
Unit temperature is too high
Yellow and white blinking alternately
| Too high temperature of the unit (electronic board) was
detected. It will not function again until it cools down, after which it will return to normal operation.
---|---
Battery with too low voltage is connected
Yellow and teal blinking alternately
| Battery with a voltage below 7 V is connected. Change the battery to one
with voltage between 7 V and 17 V.
Battery with too high voltage is connected
Red and teal blinking alternately
| Battery with a voltage over 17 V is connected. The battery must be
immediately disconnected, as it can cause permanent damage! Change the
battery to one with voltage between 7 V and 17 V.
Main transistor or driver damage
Red and yellow blinking alternately
| Main transistor or driver is damaged. Unit needs to be sent back for repair.
Battery voltage sensing malfunction
Red and white blinking alternately
| Battery detection system is malfunctioning. Unit needs to be sent back for repair.
Other known problems:
| Problem | Cause | Solution |
|---|---|---|
| Replica fires a 2-round burst in semi-auto mode. | Motor and battery | |
| are too strong for the main spring, which causes overspin. | Enable AB or |
precocking.
Too high precocking level.| Set precocking to a lower level.
Trigger mechanism malfunction.| Check the cut-off lever and contacts, replace
if needed.
Replica does not shoot; the unit does not emit any light or sound.|
Incompatible T-Deans battery connector.| T-deans plugs and sockets from
various manufacturers may sometimes not work together reliably. Although the
plug may seem to fit the socket nicely, the conductive surfaces may not
contact each other, cutting the power off. In that case try with another
battery, most preferably with T-deans socket made by different manufacturer.
Battery and/or the motor heat up very much.| The battery has a too low
capacity (mAh) and/or “C” parameter.| Use a battery with higher capacity
and/or “C” parameter.
The motor is too weak.| Use a stronger motor, possibly with neodymium
magnets.
| Increased motor load caused by excessive friction, for example caused by:
- improper shimming,
- motor positioned askew in the pistol grip.
| Remove the cause of the friction.
Motor beeps
from time to time
| Li-Po alarm has activated| Replace the battery (if you’re not using a Li-Po or Li-Ion, disable the Li- Po alarm)
In case of any technical questions, please contact us at: info@perunairsoft.pl
Contacts check
AB++ allows you to easily check, whether the trigger contacts in the gearbox or the button on the unit are functioning properly. When the unit is connected to the battery, but disconnected from the motor, it informs about this with yellow, flashing light. If during that time, a properly working and connected trigger contacts will be closed, or the button on the unit will be pressed, the unit will signal that by changing the LED color for a moment. After you enter the switch check mode, it will be active for 5 minutes, after which the unit will shut down. To restart it, simply reconnect the battery.
To enter Contacts check mode, the motor must be disconnected first, only then connect the battery!
| LED color | Switch |
|---|
Disconnected motor / Contacts check
Yellow, blinking
| No switch activation is being detected at this moment
Trigger
Purple
| Trigger contacts are closed.
Button on the unit
Green
| Button on the unit is being pushed.
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