RayTek MARATHON MM SERIES - External Input; Trigger

Operation
44 Rev. D7 Jul 2017 Marathon MM
7.4.3 External Input
The external input can be used to provide the following functions:
 digital input for triggering
 digital input for On/Off switching of the laser
 analog input for compensating the ambient background temperature
 analog input for setting the emissivity
Only one input function can be active at a given time. Before changing to another input
function (e.g. remote emissivity setting) the currently set function (e.g. ambient
background compensation) needs to be switched off explicitly!
See the DataTemp Multidrop Software help for set up instructions, or refer to the required parameter
commands in section 10.9.3 External Input, page 76.
Figure 24: Digital (left) and Analog (right) Using of External Input
7.4.3.1 Trigger
The trigger is activated by shorting the external input to digital ground (pin GROUND on the terminal
block) for a minimum duration pulse of 10 ms. That can be done with an external switch, relay,
transistor, or TTL gate.
Sensor
Sensor
TRIGGER
Analog ground
(pin –mA OUT)
TRIGGER
Digital ground
(pin GROUND)