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Seismic Switch
GST-43-M
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  Datasheet
Seismic Switch
Features:
  • Two Seismic Switch Setpoints (2mg to Full Scale) with Independent Digital Output
  • Internal Tri-axial MEMS Accelerometers
  • Industrial 16 Bit 80 MHz CPU
  • Automatic Zero Offset
  • STA/LTA Earthquake Detected Algorithm Support Real Time Tri-axial And Vector Acceleration Output
  • Store Earthquake Time, Maximum Intensity, Vector, Tri-axial Acceleration And Instant Tri-axial Acceleration Of Earthquake
  • Support Modbus RTU / TCP, NTP Time Calibration, Up to 3 Hosts Connections Via Modbus TCP
Specifications Ordering Information
Specifications

Accelerometer

  • Type
    Tri-axial MEMS
  • Range
    ± 2 g (X Y Axes)
    + 1 g / -3 g (Z Axis)
  • Frequency Response
    0 ~ 20 Hz
  • Shock
    500 g/0.5 ms
    3000 g/0.1 ms

Digitizer

  • ADC Resolution
    12 Bit
  • Digital Resolution
    < 0.001g

Earthquake Gauge

  • Algorithm
    STA/LTA
  • STA Setting Range
    0.1 ~ 100 second
  • LTA Setting Range
    0.1 ~ 100 second
  • Offset Period
    30 ~ 32767 min
  • Event Duration Time
    1 ~ 200 s

Switch Setpoints

  • Digital Output Numbers
    2
  • Setport Range
    2 ~ 1960 mg
  • Contact Type
    Open Collector
  • Contact Capacity
    0.6 A DC
  • Hold-On time
    Same as Event
    Duration Tim

CPU

  • CPU
    80186 or compatible (16-bit and 80 MHz)
  • SRAM
    512 KB
  • Flash
    512 KB; Erase unit is one sector (64K bytes); 100,000 erase/write cycles.
  • EEPROM
    16 KB
    Data retention: 40 years; 1,000,000 erase/write cycles.
  • NVRAM
    31 Bytes (battery backup, data valid up to 10 years)
  • RTC (Real Time Clock)
    RTC Provide seconds, minutes, hours, date of week/month; month and year, valid from 1980 to 2079
  • 64-bit Hardware Serial Number
    Yes
  • Built-in Watchdog Timer
    Yes (0.8 second)

Communication Interface

  • COM1
    RS-232 (TxD, RxD, CTS, RTS and GND); Non-isolated
  • COM2
    RS-485 (D2+, D2-; self-tuner ASIC inside); Non-isolated
  • Ethernet Port
    10/100Base-TX Ethernet Controller
    (Auto-negotiating, Auto_MDIX, LED indicator)

COM Port Formats

  • Data bit
    8
  • Parity
    None
  • Stop bit
    1

Modbus Formats

  • Modbus TCP
    3 Host Simultaneously
  • Modbus ID
    Default 101, settable
  • Modbus Function
    Function 3 and 16
  • Modbus Variables Address
    100 ~ 158, 171 ~ 191 include Real Time Acceleration, Event Information,
    IP Address Setting,Server IP Address Setting,NTP IP Address Setting, etc

LED Display

  • 5-Digit 7 Segment LED Display
    Yes
  • System LED Indicator
    Yes

Dimensions

  • W x H x D
    72 mm x 123 mm x 35 mm

Operating Environment

  • Operating Temperature
    -25°C ~ +75°C (-10~60)
  • Storage Temperature
    -40°C ~ +80°C (-20~70)
  • Relative Humidity
    5 ~ 90% RH, non-condensing

Power

  • Protection
    Power reverse polarity protection
  • Frame Ground for ESD Protection
    Yes
  • Required Supply Voltage
    +10 ~ +30 VDC (non-regulated)
  • Power consumption
    2.5 W for GST-43-M
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