RayTek MI Miniature Infrared Sensor - Manual (Page 36)

Installation
28 MI
5.4.4 Trigger and Hold Function
The FTC3 input can be used as external trigger in conjunction with
the software trigger mode setting “Trigger” or “Hold”.
Figure 17: Wiring of FTC3 as External Input
Trigger: A logical low signal at the input FTC3 will reset the peak or
valley hold function. As long as the input is kept at logical low level
the software will transfer the actual object temperatures toward the
output. At the next logical high level, the hold function will be
restarted.
Figure 18: FTC3 for Resetting the Peak Hold Function
External switch:
- contact relay,
- transistor,
- TTL gate, …
object temperature
output temperature
FTC3
Temp
Time