Specifications
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5.2.3 Acquisition Trigger Input Specifications
Table 5-4: Acquisition Trigger Input Specifications
Specification Description
ON 20 to 28V (24V nominal)
Voltage
OFF 0 to 3V (12V nominal threshold)
ON 2.0 to 2.9mA
OFF <150µA
Resistance ~10,000 Ohms
Current
For higher current add external resistor (for example, 2.2kΩ, 0.5W for 12mA)
across inputs.
Delay
76 µSec latency between leading edge of trigger and start of acquisition. Input
pulse should be minimum of 1ms wide.
The acquisition trigger input 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.
Figure 5-2: Acquisition Trigger Input Schematic
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