In-Sight
®
1700 Series Wafer Reader
Section 8: Specifications
8.2.2 Acquisition Trigger Input
In-Sight 1721/1722 Acquisition Trigger Input Specifications
Table 8-5: 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 <150
µ
A
Resistance ~10,000 Ohms
CURRENT
For higher current add external resistor (for example, 2.2k
Ω
, 0.5W for 12mA) across inputs.
DELAY
In-Sight 1721/
In-Sight 1722
76
µ
Sec 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 8-1: In-Sight 1721/1722 Acquisition Trigger Input Schematic
107
Содержание In-Sight 1721
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