Baumer OADM 20I6591 Bedienungshandbuch Seite 42

Synchronizing several sensors
Several sensors may be synchronized using an external clock. The clock cycle must be low for T1. The total
time of a cycle must be at least T2. Within 20 cycles all sensors will be synchronized.
12-28V
sync. signal
0V
Sensor
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If sensors are being synchronized this way, they all start their cycles at the same time. This means they start
to sample light together. The length of the sampling interval T3 or shutter time depends on the surface. It
may range from T3. White or gray objects reflect well enough to enable a less than half the sampling of
interval T3 max. Only very dark objects actually need the maximum sampling interval.
Several sensors in non-synchronous use
To prevent a negative mutual influence, using several OADM 20I659..., the sensor can be used with a non-
synchronous trigger pulse. 12-28 V must be applied to the sync input, so that the laser will be turned off. The
following timing has to be obtained (S1 = sensor 1, S2 = sensor 2).
12-28 V
synch. input S1
0 V
20 mA
analog output S1
4 mA
12-28 V
synch. input S2
0 V
20 mA
analog output S2
4 mA
BA_OADM20x659x.doc
12.06.2017
T1
T2
T1
10 ... 250 µs > 2.2 ms
10 ... 250 µs > 3 ms
10 ... 250 µs > 4 ms
t1
t2
42/48
T2 T3
3 µs ... 340 µs
3 µs ... 670 µs
3 µs ... 1330 µs
Baumer
Frauenfeld, Switzerland