Gossen MAVOSPEC - Manual (Page 19)

GOSSEN Foto- und Lichtmesstechnik GmbH 19
Pin allocation
– stereo mini jack plug 3.5 mm
1. Sleeve - GND
2. TRIGGER OUT
- Open collector (Optocoupler TLP 127 - Darlington transistor).
- Maximum Collector current: 50 mA.
- The transistor is turned on during the measurement
3. TRIGGER IN
- The measurement is triggered by the rising edge of voltage (3 - 9V)
4. Isolating rings
Circuit diagram: