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Messenger

Input and Output Monitoring Specifications

The Messenger monitors remote conditions using digital and analog inputs and outputs.

All values read can be automatically converted into engineering units, compared to user-specified limits and the web-based back-end alerted immediatly upon a limit violation. Remote devices can be controlled via the back-end or via SMS commands.

Conditions Monitored
General input conditions
  • 1 to 3 general purpose or pulse closure-to-ground inputs
  • Analog input 0-10V (0-20ma or resistive optional)
  • 1 output (closure-to-ground)
  • GPS coordinates for location (can be removed if not required for the application)
Reporting values to the web-based back-end
  • Current state of the digital inputs
  • Count of the digital inputs
  • Total time the digital inputs are in a particular state
  • Raw analog value or scaled into engineering units
  • Max, Min of the analog input over the day
  • Amount of time in a range, up to 4 ranges can be specified for the analog input
  • Number of times moving into a range
  • 2 high and 2 low limits specified for the analog input
  • Report immediately when any limit has been violated for the analog or digital inputs
Specifications
Serial ports
  • RS232/RS485 for debug or configuration
  • External CDMA or Satellite modems
  • Support OEM-specific communication
Battery backed
  • Real-Time Clock
  • Programming
  • Event log
Communication methods to web-based back-end
  • GSM-GPRS
  • Wi-Fi
  • CDMA
  • Satellite
  • Serial
Certifications
  • FCC, PTCRB and ATT approvals for GSM/GPRS end-user applications
  • Operating vibration: exceeds SAE J1455 vibration levels
  • Operating shock: exceeds SAE J1455 shock levels
  • Enclosure: exceeds IP65/NEMA 4X
  • RoHS compliant
Power management
  • Extreme low power mode for battery-powered applications
  • Automatic switch out of low power on: movement, engine on, time
Memory management
  • 512k FLASH for application, loadable OTA or via serial connection
  • 512k low-low power SRAM, battery backed
DIP switches
  • Serial port function - Debug, Other
  • Serial port interface - RS232 or RS485
  • Baud rate
Event logger
  • Last 500 significant events
  • Accessible over-the-air
  • Accessible locally via serial port
  • Battery backed
LEDs
  • Power modes - off, low, full
  • Cellular/Wireless status and signal strength
  • GPS status
  • CAN status
  • Serial port status
  • OEM specific
General purpose inputs
  • Up to 3 digital (closure to ground) inputs
  • Analog input - voltage, ma or resistive
  • Digital output (closure to ground)
SMS capabiltiy
  • Receive commands for changing configuration
  • Receive commands for over-the-air direct communications with internal menuing system
  • On-demand reporting of values
  • OEM specific
Physical Characteristics
  • 3.25" x 3.95"
  • Operating power: 8-32VDC
  • Sleep mode - less than 6 ma @ 12VDC
  • Monitoring mode - 110ma @ 12VDC
  • GPRS transmit mode - 600ma peak @ 12VDC
  • Industrial temperature range -40 to +85C
  • Watertight industrial enclosure