External Input/Output Functions - GRAPHTEC GL450 User Manual

External Input/Output Functions

Input/output types
Input specifications
Alarm output specifications Output format: Open collector output (100 kΩ pull-up resistance)
Pulse input
Item
Trigger input (1 ch), Logic input (4 ch), Pulse input (1 ch),
Alarm output (4 ch)
Maximum input voltage: +24V
Input threshold voltage: Approx. +2.5V
Hysteresis: Approx. 0.5 V (+2.5 to +3 V)
Output conditions: Level judgment, window judgment,
Revolutions mode (engines, etc.)
• Function: Counts the number of pulses per second; enables them to be
• Ranges: 500, 5 k, 50 k, 500 k Revolutions/F.S.
Counts mode (electric meters, etc.)
• Function: Displays a count of the number of pulses for each sampling
• Ranges: 50 k, 500 k, 5 M, 50 M, 500 M C/F.S.
Inst. mode
• Function: Counts the number of pulses for each sampling interval.
• Ranges: 50 k, 500 k, 5 M, 50 M C/F.S.
Maximum number of pulse inputs
• Counts, Inst. modes: 50 k/sampling interval
• Revolutions: 50 k/s
Description
logic pattern judgment, pulse judgment
converted to rpms.
interval from the start of measurement.
Resets the count value after each sampling interval.
Specifications
5-7