5-9
CHAPTER 5 Specification
External Input/Output Functions
Item
Description
Input/output types
• Trigger input (1 ch) or External sampling input (1 ch)
• Logic input (4 ch) or Pulse input (4 ch) (Only when the GLT400 is set to STAND-ALONE)
• Alarm output (4 ch) (Only 1 ch when the GLT400 is set to REMOTE)
* Switch between Logic and Pulse.
* Switch between Trigger and External sampling.
* The Input/output cable for GL B-513 (option) is required to use the external output function.
Input specifications
Input voltage range : 0 to +30 V (single-ended ground input)
Input signal: No-voltage contact (a-contact, b-contact, NO, NC), Open collector, Voltage input
Input threshold voltage: Approx. +2.5 V
Hysteresis: Approx. 0.5 V (+2.5 to +3 V)
* Refer to "2.11 Logic Alarm Cable Connection and Functions" for details on the input circuit.
Alarm output specifications
Output format: Open collector output (5 V, pull-up resistance 10 kΩ)
<Maximum ratings of output transistor>
• Collector-GND voltage : 50 V
• Collector current: 2 A
• Collector dissipation: 0.3 W
* Refer to "2.11 Logic Alarm Cable Connection and Functions" for details on the output circuit.
Output conditions: Level judgment, window judgment, logic pattern judgment, pulse judgment.
Pulse input
(Only when the GLT400 is set to
STAND-ALONE)
Revolutions mode (engines, etc.)
Function: This mode counts the number of pulses per sampling interval, and then converts
them by multiplying the scaling factor to the RPM.
Settable the number of pulses per revolution during revolution
Spans: 50, 500, 5000, 50 k, 500 k, 5 M, 50 M, 500 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: 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.
Resets the count value after 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: 50 kHz
Maximum number of count: 50 kC/sampling (16-bit counter)
