Installing In-Sight™ 4000 Series Vision Sensors Section 3 - Specifications
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3.2.2 Acquisition Trigger Input
Table 3-5: Acquisition Trigger Input Specifications
SPECIFICATION DESCRIPTION
ON 20 to 28V (24V nominal) Voltage
OFF 0 to 3V (12V nominal threshold)
ON 0.9 to 1.3mA
OFF <150µA
Resistance ~22,000 Ohms
Current
For higher current add external resistor (for example, 2.2kΩ, 0.5W for 12mA) across inputs.
Delay
250 µSec latency between leading edge of trigger and start of acquisition. Input pulse should be minimum
of 1 ms wide.
The acquisition trigger input on the 4000 is opto-isolated. To trigger from an NPN (pull-
down) type photo-detector or PLC output, connect pin 2 (TRG+) to +24V and connect
pin 3 (TRG-) to the output of the detector. When the output turns ON, it pulls TRG-
down to 0V, turning the opto-coupler ON.
To trigger from a PNP (pull-up) photo-detector or PLC output, connect pin 2 (TRG+) to
the output of the detector and connect pin 3 (TRG-) to 0V. When the output turns ON, it
pulls TRG+ up to 24V, turning the opto-coupler ON.
NOTE When using the In-Sight 4000 with the Breakout Cable, the polarity of the input trigger (pins 2
and 3) is not critical. However, when using the optional Breakout or I/O Expansion Modules, the
polarity of the TRG+ and TRG- terminals should be observed.
Figure 3-1: Acquisition Trigger Input Schematic
