| NMRA DCC Controller for Model Railroad |
Improvement of Reliability
Decoder Protector
Decoder equips four kinds of protector for preventing to get damages.
* Overcurrent Protection of Function Output
All the function outputs are turned off to protect decoder, when the sum of function output current exceeds maximum current limit.
There is no problem that light bulb is connected directly without series register because output device is fully maximum current limit. If inrush current exceeds maximum current limit, all the function outputs are turned off. Only in this case, series registers are needed.
* Overcurrent Protection of Motor Output
The motor output are turned off to protect decoder, when motor output current exceeds maximum current limit. Blinking function OUT2 shows occurrence of motor protection. This protection is released after complete motor stop.
* Motor and Rail Short Circuit
Motor outputs are checked if motor outputs are applied voltage to, only when decoder power on. This is for detecting motor and rail output short circuit which sometimes happens as installation. When this state is detected, decoder will stop except for blinking both of OUT1 and OUT2.
* Over Voltage of Rail
All the operation stops to protect decoder, when rail voltage exceeds rail voltage limit. Blinking function OUT1 shows occurrence of over voltage protection.
Power Flicker Protector
Decoder power from rail is flicked off around 0.1 second caused by dirty of rail or wheel. This future especially prevents that the vehicle suddenly stops and accelerates fro complete stop when CV3 and CV4 are set to big value.
CV value protection
Sometimes CV value is erased when power flickers are repeated caused by dirty of rail or wheels. All the CV value can store into other location where it is hard to erase them. When CV value is erased, user can restore them from this location. Two sets of CV value can be stored, so user can easily change all the CV value for different layout.
Packet Timeout
When DCC packet which has same address as decoder donft receive beyond CV11 time limit, the motor is made stop. This future exists because there is possibility that some problem occurs in command station and the train can not be controlled. This future can prevent uncontrolled train.
Program Download
Decoder program can be loaded for version up leaving the decoder installed. Please connect exclusive downloader between rail and USB terminal of personal computer and connect something to OUT1 which is used for acknowledgement during download.
