Option boards

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Collect the right data with our option boards

Option boards to customize your data logger

Option boards can be used to add additional inputs/features to an ML-417 data logger or to perform signal conditioning. You can mechanically stack up to 3 option boards, but only one board per category ID (CID). Some boards come with a switch to choose a different CID, so you can stack multiple similar boards.

Converter(OC) or Power (OP) boards don’t have CID’s and you can stack as many OC/OP-boards as mechanical feasible. OC-boards don’t make use of the internal control bus, but are wired to existing inputs/outputs/ports.

For detailed info, please consult the option board manual.

Option board category

CID

0x48 & 0x49

SKU, Description

ML-OI-AD-80MV, Dual channel 16-bit differential input.

a/o to connect pyranometers or load-cells

Ranges

  • ±80mV
  • ±40mV
  • ±20mV
  • ±10mV

Terminals

1. In 1 (+)
2. In 1 (-)
3. In 2 (+)
4. In 2 (-)
5. Excitation (5V @80mA)
6. Ground
7. CID selector

CID

0x48 & 0x49

SKU, Description

ML-OI-AD-2000MV, Dual channel 16-bit differential input Dual channel 16-bit differential input. a/o to connect thermistors or pH-probes

Ranges

  • ±2000mV
  • ±1000mV
  • ±500mV
  • ±250mV

Terminals

1. In 1 (+)
2. In 1 (-)
3. In 2 (+)
4. In 2 (-)
5. Excitation (5V @80mA)
6. Ground
7. CID selector

CID

0x48 & 0x49

SKU, Description

ML-OI-AD-10V, Quad channel 15-bit single ended input

Ranges

  • 0 … 10V
  • 0 … 5V
  • 0 … 2.5V
  • 0 … 1.25V

Terminals

1. Input 1
2. Input 2
3. Input 3
4. Input 4
5. Excitation (12V)
6. Ground
7. CID selector

CID

0x48 & 0x49

SKU, Description

ML-OI-AD-20MA, Quad channel 15-bit single ended input

Ranges

  • 0/4 … 20mA

Terminals

1. Input 1
2. Input 2
3. Input 3
4. Input 4
5. Excitation (12V)
6. Ground
7. CID selector

CID

0x48 & 0x49

SKU, Description

ML-OI-AD-PT1000, Dual channel 2 or 3-wire PT1000 input

Ranges

  • -40…+85°C (±1.5°C)
  • -20…+40°C (±1°C)
  • On user calibration:
  • -40…+85°C (±0.5°C)

Terminals

1. In 1(+)
2. In 1(-)
3. In 1(-)
4. In 2(+)
5. In 2(-)
6. In 2(-)
7. Wire selector
8. CID selector

CID

0x46
&
0x47

SKU, Description

ML-OI-AX-DI, to add four more digital inputs

Ranges

States: 0/1
Max counter: 16777216
Max input voltage: 5V
Max frequency: 500Hz

Terminals

1. Input 1
2. Input 2
3. Input 3
4. Input 4
5. Ground
6. Backup batt.
7. CID selector

CID

0x46
&
0x47

SKU, Description

ML-OI-AX-DS18B20, to connect up to four 1-Wire digital thermometers.

Supported chips:
DS1820, DS18B20, DS18S20, DS1822, DS1920

Terminals

1. Input 1
2. Input 2
3. Input 3
4. Input 4
5. Excitation (3.6V)
6. Ground
7. CID selector

CID

0x46
&
0x47

SKU, Description

ML-OI-AX-HART, Octo channel HART input

Supports multi-drop topology to connect multiple sensors divided over max 8 input channels.

Terminals

1. Loop (+)
2. Loop (-)
3. Excitation (12V)
4. CID selector

CID

0x46
&
0x47

SKU, Description

ML-OI-AX-RH, to connect an external I2C based humidity sensor

Supported chips (* since V1.04):
AM2315 (AOSONG)
BME280* (Bosch)
ChipCap2 (Amphenol)
T9602-D-3(Telaire)
SHT3x, SHT4x* (Sensirion)

Note: We recommend a cable length of max 0.5m.

Terminals

1. SCL
2. SDA
3. Excitation (3.6V)
4. Ground
5. CID selector

CID

0x76

SKU, Description

ML-OI-BARO, Atmospheric pressure & temperature sensor a/o to compensate readings of level sensors

Ranges

  • 300…1200hPa (±2hPa)
  • -30…+70°C (±1°C)

Terminals

CID

0x4C

SKU, Description

ML-OI-COM-UART, Serial sensor input (UART)UART to connect sensors with TTL UART port

Ranges

  • 300…230k4 bps
  • Tx (0…3.3V)
  • Rx (0…5V)

Terminals

1. Excitation (3.3V)
2. Transmit
3. Receive
4. Ground

CID

0x4C

SKU, Description

ML-OI-COM-RS232, Serial sensor input (RS232) a/o to connect an NMEA-0183 transponder

Ranges

  • 300…230k4 bps

Terminals

1. Excitation (12V)
2. Transmit
3. Receive
4. Ground

CID

0x4C

SKU, Description

ML-OI-COM-RS485, Serial sensor input (RS485) a/o to connect a MODBUS/RTU sensor

Ranges

  • 300…230k4 bps

Terminals

1. Excitation (12V)
2. RS485 A+
3. RS485 B-
4. Ground

CID

0x4C

SKU, Description

ML-OI-COM-SDI12, SDI-12 sensor input

Terminals

1. Excitation (12V)
2. Ground
3. Data

CID

0x4D

SKU, Description

ML-OA-RS232, RS232 Auxiliary board. To add a secondary accessory to an ML-417ADS (e.g. to add a second camera)

Ranges

  • Off/On (0/3.6V)
  • 300…230k4 bps

Terminals

1. Control output (0/3.6V)
2. Transmit
3. Receive
4. Ground

CID

0x4D

SKU, Description

ML-OA-WIFI, WiFi Auxiliary boardWiFi interface To transfer log files by WiFi (TCP, MQTT & HTTP)

Ranges

  • <400m
  • +19dBm transmit power
  • -96dBm sensitivity
  • IEEE 802.11b/n/g

CID

0x50
&
0x51

SKU, Description

ML-OO-MODBUS, MODBUS/RTU auxiliary output boardMODBUS Slave To share sensor readings with your local SCADA system.

Ranges

  • 32 floating-point values
  • 4800…38k4 bps

Terminals

1. RS485 A+
2. RS485 B-
3. Ground
4. CID selector

CID

0x50
&
0x51

SKU, Description

ML-OO-SW, digital output boardGalvanic isolated switches To add three galvanic isolated switches with potential free contacts

Ranges

  • ±100V
  • ±200mA

Terminals

1. Contact 1a
2. Contact 1b
3. Contact 2a
4. Contact 2b
5. Contact 3a
6. Contact 3b
7. CID selector

CID

n/a

SKU, Description

ML-OC-W2P, Waveform to digital pulse converter. Converts a Sine form to a digital pulse to connect flow or anemo-meters with a passive coil output.

Ranges

  • 0…10kHz
  • 60mV…24V input
  • Off/On (0.1/3.6V) output

Terminals

1. Coil in (+)
2. Coil in (-)
3. Pulse out

CID

n/a

SKU, Description

ML-OP-524, additional power for sensors or standalone power supply. Power switches “on” in parallel with the standard data logger sensor power, from an external control signal or continuously.

Ranges

  • 5V@300mA, 12V@200mA
  • or 24V@100mA
  • Off/On: 0/3…24V
  • 3.6V (from batteries)

Terminals

1&2, Power output
3&4, Ground
5. Control input
6. 3.6V supply
7. Volt selector
8. Control mode

CID

0x4A

SKU, Description

ML-OU-BLE, Bluetooth LE user interface. To enable wireless local access.

Ranges

  • <160m
  • +4dBm transmit power
  • -92dBm sensitivity

Discover the possibilities

Want to know more about what YDOC can do to help you with your quest for the right data logger? Do not hesitate to get in contact.