Model number GL840-M GL840-WV Number of analog input channels 20 channels in standard configuration, Expandable up to 200 channels Type of analog input terminal Multi-input type, Withstand-voltage type, Screwless terminal (option) Port for digital sensor 1 port for the sensor/input terminal/adapter of the GL100 External input/ output (*1) Input (*2) Trigger or Sampling (1 channel), Logic/Pulse (4 channels) Output (*3) Alarm (4 channels) Sampling interval 10 ms to 1 hour (10ms to 50ms: voltage only) (*4), External signal Trigger, Alarm function Trigger action Start or stop capturing data by the trigger Repeat action Off, On (auto rearmed) Trigger source Start: Off, Measured signal, Alarm, External, Clock, Week or Time Stop: Off, Measured signal, Alarm, External, Clock, Week or Time Condition Setting Combination: OR or AND Analog signal: Rising (High), Falling (Low), Window-in, Window-out Logic signal: Pattern (combination of each input signal in high or low) Pulse (number of count): Rising (High), Falling (Low), Window-in, Window-out Pulse input function measurement mode Rotation count (RPM) mode Accumulating count mode Instant count mode Maximum number of pulse inputs Maximum input frequency : 50kHz Maximum number of count : 50kC/sampling (16-bit counter) Calculation function Between channels Addition, Subtraction, Multiplication, and Division for analog input Statistical Select two calculations from Average, Peak, Maximum, Minimum, RMS Interface to PC Ethernet (10 BASE-T/100 BASE-TX), USB (Hi-speed), WLAN (using B-568 option) * B-568 is available in limited region. Storage device Internal Built-in 8GB Flash Memory (*5) External One SD card slot (Support SDHC memory card, up to 32GB) (*6) Saved contents Captured data, Setting conditions, Screen copy Operating environment 0 to 45 ºC, 5 to 85 % RH (non condensed) (When operating with battery pack 0 to 40 ºC, charging battery 15 to 35 ºC) Power source AC adapter 100 to 240 V AC, 50/60 Hz (1 pc of adapter is attached as standard accessory) DC power 8.5 to 24 V DC (DC drive cable (option B-514) is required) Battery pack Mountable two battery packs (battery pack (option B-569): 7.2V DC, 2900mAh) Power consumption (*7) Max. 38 VA External dimensions (W x D x H in mm, Excluding projections) Approx. 246 x 161 x 58.2 (with the cover) Approx. 246 x 170.4 x 58.2 (with the cover) Weight (*8) Approx. 1218 g (the cover is attached) Approx. 1244 g (the cover is attached)