GRAPHTEC GL900 - External Input;Output Functions

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Specifications
External Input/Output Functions
Item Description
Input/output types Trigger input (1 ch)
Logic input (4 ch) or Pulse input (4 ch)
Alarm output (4 ch)
* Switch between Logic and Pulse
Input specifications Maximum input voltage : 0 to +24 V (single-ended ground input)
Input threshold voltage : Approx. +2.5 V
Hysteresis : Approx. 0.5 V (+2.5 V to +3 V)
Alarm output specifications Output format : Open collector output (5 V, 10 KΩ pull-up resistance)
Contact capacity 5 V to 24 V, 100 mA or below
Output conditions : Level judgment, window judgment, logic pattern judgment,
pulse judgment
* Alarm output is judged every 5 ms.
Pulse input Revolutions mode (engines, etc.)
Function : Counts the number of pulses per second and multiplies it by 60 to
display an rpm value.
Spans : 5, 10, 20, 50, 100, 200, 500,
1 k, 2 k, 5 k, 10 k, 20 k, 50 k,
100 k, 200 k, 500 k,
1 M, 2 M, 5 M, 10 M, 20 M RPM/F.S.
Counts mode (electric meters, etc.)
Function : Displays a count of the number of pulses for each sampling interval
from the start of measurement.
Spans : 5, 10, 20, 50, 100, 200, 500
1 k, 2 k, 5 k, 10 k, 20 k, 50 k
100 k, 200 k, 500 k,
1 M, 2 M, 5 M, 10 M, 20 M C/F.S.
Inst. mode
Function : Counts the number of pulses for each sampling interval.
Resets the count value after each sampling interval.
Spans : 5, 10, 20, 50, 100, 200, 500
1 k, 2 k, 5 k, 10 k, 20 k, 50 k,
100 k, 200 k, 500 k,
1 M, 2 M, 5 M, 10 M, 20 M C/F.S.
Maximum number of pulse inputs
Maximum input frequency : 50 kHz
Maximum number of counts : 15 MC (24-bit counter)