External trigger connector pinout, Setting external trigger polarity – Sumix SMX-150M User Manual
Page 64

Snapshots
64
SMX-150M USB2.0 Camera User Guide
External Trigger Connector Pinout
The External Trigger Connector pinout is described in the table below.
●
External trigger input (#1) - an input used to trigger a snapshot by applying a posi-
tive pulse (3.3V TTL, duration is not less than one period of the clock frequency).
●
Delayed synchronous shutter start (#2) - same as Pin # 5, but delayed by the time
specified in application program. Can be used to activate a flash.
●
User programmed output (#3) - user programmed output
●
External trigger input (#4) - same as Pin # 1, but for negative triggering pulse
●
Synchronous shutter start (#5) - a pulse occurs at this output when the camera is in
snapshot mode and snapshot control sequence begins. It can be used to trigger
another camera for synchronous operation or to activate a flash.
Note:
For the cameras with firmware 1.3.7.11.34 (1.4.7.11.34 - for the color models) or lower Pin# 3 of the External
Trigger Connector pinout (User programmed output) is not available.
Figure 6-9 Camera Connector View, as mounted on the camera
Setting External Trigger Polarity
The polarity of external trigger is set via the Device Setting window (press Alt+s on the
keyboard).
Pin# Direction
Signal
Polarity
1 Input External
trigger input
Positive
2 Output
Delayed
synchronous shutter start
Positive
3
Output
User programmed output
-
4
Input
External trigger input
Negative
5
Output
Synchronous shutter start
Positive
6
- Common
(ground) -