88 Vuquest 3320g User Guide
External Trigger Polarity
External Trigger Polarity has two states, High and Low. A digital high polarity is 1
and a digital low polarity is 0. If the third party device triggers on low polarity, 0,
scan the External Trigger Polarity Low barcode. Default = External Trigger Polarity
High.
External Trigger Parameters
Absolute Maximum
Maximum Input Voltage Low Value: -0.5 Volts
High Value: +5.5 Volts
The input is protected by an input protection diode
on the ground side.
The input voltage can be below ground provided it is
current limited below the value shown on the next line
of this table.
Maximum Input Current Low Value: -6
Milliamperes
Input protection diode current. The limiting factor on
current is the dissipation in the 1KΩ, 0402 resistor
(not the gate diode limit).
Parameter Values
Input Resistance to Ground Low Value: 9.7 KΩ
Nominal Value: 10.0
KΩ
High Value: 10.3 KΩ
Pull down resistor loading.
Maximum Input Low Voltage Logical
Low Level
High Value: 0.8 Volts Value does not include harness drops or margin for
noise.
Input High Voltage Threshold Low Value: 2.6 Volts Value does not include harness drops or margin for
noise.
* External Trigger Polarity High
External Trigger Polarity Low
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