The feature port serves to connect any type of accessories to the RACE RESULT System. It provides ground, +12V, +5V, RX and TX. Besides the Active Extension (see Active Loop Setup) there are several Accessories you can connect.
The pins on the feature port are used as follows:
1: +4,8V output (5V - Schottky diode) (500mA max)
2: +11V-15V (unfused! two way!)
3: TXD 3,3V TTL
4: RXD 3,3V TTL internal Pull Up 10k
5: IO Digital Trigger - max 3,3V
SHIELD = GND
Connect non RACE RESULT equipment at your own risk!
Short circuits will damage the system.
Only use original Neutrik connectors, cheap connectors do not connect GND reliably.