Faber M1600 User Manual

Operational Reference  •  49 

•  Genie provides two sets of opto-coupled inputs for either RS422 or TTL signals. These can be used as external 

trigger sources. 

•  See 

"

" on page 90

 for connector pinout and electrical information. The 

cable shell and shield should electrically connect the Genie chassis to computer chassis for maximum EMI 
protection.  

•  For external triggers, a rising edge signal is suggested to minimize the time it takes for the opto-coupler to 

change state. (The opto-coupler response time is typically 10µs for rising edge compared to 50μs for falling 
edge).  

•  Each input incorporates a signal debounce circuit (following the opto-couple) to eliminate short noise 

transitions that could be wrongly interpreted as a valid pulse. The duration is user-programmable from 1µs to 
255µs with CamExpert.  

•  Note, the external trigger input propagation delay is dependent on the signal used to activate the opto-coupled 

input. Typical delays are 3 µs for Active Open and 5 µs for Active Close. 

 

CamExpert provides control of inputs via the I/O Controls Parameters tab. The Input Settings dialog box allows 
you to view the signal and status for each pin on the Hirose connector. The Polarity drop-down list boxes, located 
in the INPUT Settings area, allow  you to specify the polarity of the Input 1 and Input 2 as either Active High or 
Active Low. The Minimum duration field for each input, allows you to specify the minimum trigger length (1-
255µs ) so that input transitions are debounced to prevent unwanted trigger events.