External Input/Output Functions - GRAPHTEC midi LOGGER GL220 User Manual

CHAPTER 4 Specifications

External Input/Output Functions

Input/output types
Input specifications
Alarm output specifications
Pulse input
4-6
Item
• Trigger input (1 ch) or External sampling input (1 ch)
• Logic input (4 ch) or Pulse input (4 ch)
• Alarm output (4 ch)
* Switch between Logic and Pulse
* Switch between Trigger and External sampling.
* The logic alarm cable B-513 (option) is required to use the external I/O func-
tion.
Input voltage range
Input signal
Input threshold voltage : Approx. +2.5 V
Hysteresis
* Refer to page 2-8 for details on the input circuit.
Output format: Open collector output (5 V, pull-up resistance 10 KΩ)
<Maximum ratings of output transistor>
• Collector-GND voltage : 30 V
• Collector current
• Collector dissipation
* Refer to page 2-8 for details on the output circuit.
Revolutions mode (engines, etc.)
• Function: Counts the number of pulses per second; enables them to be con-
verted to rpms.
• Spans: 50, 500, 5000, 50 k, 500 k, 5 M, 50 M, 500 M PRM/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: 50, 500, 5000, 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.
• Spans: 50, 500, 5000, 50 k, 500 k, 5 M, 50 M, 500 M C/F.S.
Maximum number of pulse inputs
Maximum input frequency : 50kHz
Maximum number of count : 50kC/sampling (16-bit counter)
Description
: 0 to +24V (single-ended ground input)
: No-voltage contact (a-contact, b-contact, NO, NC),
Open collector, Voltage input
: Approx. 0.5 V (+2.5 to + 3 V)
: 0.5 A
: 0.2 W
Resets the count value after each sampling interval.