ML-417 LTE-M & NB-IoT Data Logger

The ML-417 data logger is a small, low power, cost effective data logger with or without a built-in cellular modem (LTE-m & NB-IoT). This small data logger, is further provided with an internal temperature sensor, 8GB micro SD card and a 2FF SIM card slot. The data logger is available with several power provisions e.g. a 3.6 Volt Lithium batteries, 8..28V DC input, 12V solar panel input or integrated solar panel with battery charger.

The data logger can acquire physical signals by 2 current loop inputs, 2 voltage inputs, 1 potentiometer input and 3 digital inputs. More or special inputs can be added by means of internal stackable option boards. The data logger is provided with one serial port to capture measurements from ASCII, MODBUS, NMEA or SDI-12 compatible sensors. External sensors can be powered by the data logger itself, to prevent them to consume power while the data logger is a sleep. Up to 8 mathematical channels are available to calculate meaningful engineering values derived from sensor input values (e.g. to calculate dissolved oxygen in saline water). Supports up to 8 aggregation channels (e.g. to record 2 or 10 minute wind speed averages sampled at 1Hz).

Logged data can, when equipped with a cellular modem, be pushed to a server by HTTP(S), FTP(S), secure TCP or MQTT(S) at configurable intervals.

The ML-417 is available in several editions and with or without cellular modem:

• ML-017: Without cellular modem
• ML-417: With global LTE-M & NB-IoT modem

When equipped with the integrated solar panel a complete self providing remote monitoring station can be arranged, all you need is a logger and applicable sensor(s). This self providing cellular logger is costs saving, because you don't need: a) solar panels, b) big batteries, c) cellular modem and d) encapsulating cabinet.

Features

• Data logging
  › 1 second to 1 day intervals
  › regular, alarm and independent intervals
  › 8GB industrial grade micro SD-Card (file storage), 512kB FLASH (program storage), 64kB SRAM (runtime memory)
  
  
• 5x analog inputs (12 bit resolution & <0.2% FS accuracy)
  › 2x current loop inputs (0/4..20mA)
  › 2x voltage inputs (0..10V)
  › 1x voltage/potentiometer input (0..3.3V, max. 10Mohm) a/o to connect a wind direction sensor
  
  
• 3x digital inputs (0..5V)
  › State mode (on/off)
  › Alarm mode
  › Trigger mode (measurement, data push, camera picture)
  › Pulse counter mode (max 10kHz), e.g. to connect a flow meter, rain gauge or reed relay based wind speed sensor
  › Activity counter mode, e.g. to monitor pump running hours
  
  
• Internal sensors (a/o battery, processor temperature, signal strength)
  
  
• 8x calculation channels, to derive engineering values from sensed values using mathematical operators and functions (e.g. cos, sin, atan2, ln, sqrt)
  
  
• 8x aggregation channels, min/max, average, gust, std dev, rate of change and up to 3 different percentiles sampled at 1Hz max.
  
  
• 1x Serial port for connecting external sensors (RS-232, RS-485 or SDI-12)
  
  
• Serial port drivers
  › ASCII: Sensors autonomously outputting readable lines of numeric values
  › MODBUS: Read-out value registers from MODBUS (RTU/ASCII) slave devices
  › NMEA-0183: Sensors outputting standard and custom sentences
  › SDI-12: Read-out of up to 16 devices with up to 20 parameters per device using aC!, aM!, aCx! or aMx! commands


• 1x digital open collector alarm output to switch on a relay in case a parameter value is outside its limits (e.g. a high water level)


• Data push
  › 1 minute to 1 day intervals
  › regular and alarm intervals (direct push on alarm raise or fall)
  › native txt, json, csv, jpg (pictures) or Sparkplug B payload format
  › MQTT(S), HTTP(S), FTP(S)¹⁾ or secure TCP(AES-128)


• Alerts by SMS, e-Mail or MQTT


• Configuration by USB (local), secure TCP tunnel (remote) or optional Bluetooth LE (wireless)

Specifications

• Built-in cellular data modem (ML-417)
  › LTE-M (LTE category M2)
  › NB-IoT (LTE category NB2)
  › IPv4, IPv6, NTP, TLS (1.1, 1.2 or 1.3), SNI
  › Bands: 1,2,3,4,5,8,12,13,18,19,20,25,26,27,28,66,71 & 85
  › 2FF (Class B) SIM-CARD slot.
  › Integrated GSM antenna, external GSM antenna optional.


• Power consumption
  › 60mA@3.6V average operating²⁾ current during a duty cycle of less than 1 sec³⁾ per log interval.
  › 250mA@3.6V average operating current during 20..60 sec. data transfer
  › <80uA@3.6V sleep current
  › 12V@200mA switchable power outlet to power external sensors
  › Configurable daily operation time bracket to limit power consumption (e.g. 07:00AM to 20:00PM or 21:00PM - 06:00AM)


• Power supply options⁴⁾
  › 1 or 3 D-size 3.6V Lithium battery holders
  › 1x 26650 3.2V LiFePO4 battery holder with charger and 1Wp solar panel integrated in cover
  › 4x 18650 3.2V LiFePO4 battery holders with charger for 21VOC external solar panel
  › 12V battery charger for 21VOC external solar panel
  › 8..28V DC-Adapter
  › 8..28V DC-Adapter with 3x AA NiMH holders charger for backup
  › 8..28V DC-Adapter with D-size 3.6V Lithium backup battery holder


• Rugged and waterproof IP67 enclosure (150x120x130mm)
• Optional pole mounting bracket
• Integrated GSM antenna, external GSM antenna optional
• Wide temperature operating range –30°C +75°C

Accessories

• Several stackable option boards
• JPEG camera CAM-2.0M
• GPS receiver GPS-E3329

1) FTPS (TLS Explicit)
2) 60mA if no external sensors need to be powered.
3) <1 sec. if external sensors are responsive and don't require time to "warm up".
4) Batteries not included.

Use our online Data logger power consumption calculator to estimate the battery life of your application or to determine settings fitting local solar power yield.

For more tips, please read the application notes.