External Input/Output Functions - GRAPHTEC GL2000 User Manual

External Input/Output Functions

Item
Input/output types
Input specifications
Alarm output specifications
Trigger output
Pulse input
External sampling input
Trigger input (1 ch) or External sampling input (1 ch)
Logic input (4 ch) or Pulse input (4 ch)
Alarm output (4ch), or Trigger output (1ch) + Alarm output (3ch)
* Trigger input and external sampling input can be switched.
* Alarm output and trigger output can be switched.
Maximum input voltage : 0 to +30V (single-ended ground input)
Input threshold voltage : Approx. +2.5V (logic input, pulse input)
Approx. +1.9V (external trigger, external sampling)
Hysteresis : Approx. 0.5V (+2.5V to +3.0V) (Logic input, pulse input)
Approx. 0.2V (+1.9V to + 2.1 V) (external trigger, external sampling)
Output format: Open collector output (5 V, pull-up resistance 10 kΩ)
Contact capacity 5V to 24V, 100mA or less (0.2W or less)
Output conditions: Level judgment, window judgment, logic pattern judgment, pulse
judgment
When a trigger is detected after trigger output is set, a pulse of approx. 500 μs width is
output from the Output 1 terminal.
(Low active)
Pulse sampling interval: 10 μs to 1h
* Set it separately from sampling interval.
Setting faster than sampling interval is not possible (constant multiple)
Revolutions mode (engines, etc.)
Function: Mode to convert to the number of revolutions per minute by applying magnification
after counting the number of pulses for each pulse sampling
Span: 10 to 500M
Counts mode (electric meters, etc.)
Function: Mode to accumulate the number of pulses for each pulse sampling interval from
the start of measurement
Span: Automatic (Maximum 20M)
Inst. mode
Function: Mode to display the number of pulses for each pulse sampling interval.
The accumulated value for each pulse sampling interval is reset.
Span: 10 to 20M
Maximum number of pulse inputs
Maximum input frequency : 100 kHz
Maximum number of count : 15 MC (24-bit counter)
Maximum input frequency: 100 kHz
Temporal error: 1 μs or less.
Description
CHAPTER 4 Specification
interval.
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