Opto Isolated; Ttl Compatible - Intab PC-logger 3150 How To Use Manual

3.2.1

Opto Isolated

The opto-isolated digital inputs can be used in two ways. Which method you
use depends on your particular application.
See figure!
The transducer marked "PULSE" has to be able to drive the input:
see 4.2.1 for levels and frequencies.
Remember that mechanical contacts always bounce when brought together.
This bouncing will, unless filtered, result in a burst rather than one pulse.
PULSE
MAX 24V
3.2.2

TTL Compatible

The TTL-compatible inputs (P = Pulse in) are connected as in the figure.
Note that signal ground (GND) of the digital card has to be connected to signal
ground of the system or transducer that is used with these inputs.
1
36
DI b
DI a
OPTO ISOLATION
ANY POLARITY
TTL/CMOS
2
AND/OR
INTAB Interface-Teknik AB
OR
VO
GND
DI a
DI b
GND
GND
P2
P1
Vp
Vp