Option boards
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 our data loggers 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
Analog inputs (CID: 0x48 & 0x49)
ML-OI-AD-80MV, Dual channel 16-bit differential input , e.g. 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
ML-OI-AD-2000MV, Dual channel 16-bit differential input Dual channel 16-bit differential input, e.g. 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
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
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
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
Auxiliary inputs (CID: 0x46 & 0x47)
ML-OI-AX-DI, to add four more digital inputs
Specifications
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
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
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
ML-OI-AX-I2C, to connect a simple external I2C sensor
For simple sensors returning a consecutive array of bytes containing up to two raw ADC values.
Terminals
1. SCL
2. SDA
3. Excitation (3.6V)
4. Ground
5. CID selector
ML-OI-AX-RH, to connect an external I2C based humidity sensor
Supported chips (since V1.041), V1.062)):
AM2315, AHT2) (AOSONG)
BME2801) (Bosch)
ChipCap2 (Amphenol)
T9602-D-3(Telaire)
SHT3x, SHT4x1) (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
Auxiliary outputs (CID: 0x50 & 0x51)
ML-OO-LORA, Easily turn your YDOC data logger into a versatile LoRaWAN® end device.
Specifications
- Publishing: Up to 12 parameters
- IEEE 754 single-precision floats
- Protocol: LoRaWAN v1.0.3
- Antenna connector: U.FL / I-PEX
- Max TX power: +22 dBm
ML-OO-MODBUS, MODBUS/RTU auxiliary output board MODBUS 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
ML-OO-SW, digital output board Galvanic 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
Serial input ports (CID: 0x4C)
ML-OI-COM-UART, Serial sensor input (UART) to connect sensors with TTL UART port
Specifications
- 300…230k4 bps
- Tx (0…3.3V)
- Rx (0…5V)
Terminals
1. Excitation (3.3V)
2. Transmit
3. Receive
4. Ground
ML-OI-COM-RS232, Serial sensor input (RS232) a/o to connect an NMEA-0183 transponder
Specifications
- 300…230k4 bps
Terminals
1. Excitation (12V)
2. Transmit
3. Receive
4. Ground
ML-OI-COM-RS485, Serial sensor input (RS485) a/o to connect a MODBUS/RTU sensor
Specifications
- 300…230k4 bps
Terminals
1. Excitation (12V)
2. RS485 A+
3. RS485 B-
4. Ground
ML-OI-COM-SDI12, SDI-12 sensor input
Terminals
1. Excitation (12V)
2. Ground
3. Data
ML-OU-BLE, Bluetooth LE user interface. To enable wireless local access.
Specifications
- <160m
- +4dBm transmit power
- -92dBm sensitivity
Accessory boards (CID: 0x4D)
ML-OA-RS232, RS232 Accessory board. To add a secondary accessory to an ML-417ADS (e.g. to add a second camera)
Specifications
- Off/On (0/3.6V)
- 300…230k4 bps
Terminals
1. Control output (0/3.6V)
2. Transmit
3. Receive
4. Ground
ML-OA-WIFI, WiFi accessory board, WiFi interface To transfer log files by WiFi (TCP, MQTT, E-mail & HTTP)
Specifications
- <400m
- +19dBm transmit power
- -96dBm sensitivity
- IEEE 802.11b/n/g
ML-OI-BARO, Atmospheric pressure & temperature sensor a/o to compensate readings of level sensors.
Note: To measure atmospheric pressure inside an enclosure, you must use a breather (also known as a venting plug). However, never use a venting plug in areas with high humidity or corrosive/salty air. In such cases, an external sensor should be used instead.
Specifications
- 300…1200hPa (±2hPa)
- -30…+70°C (±1°C)
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.
Specifications
- 0…10kHz
- 80mV…24V RMS input
- Off/On (0.1/3.6V) output
Terminals
1. Coil in (+)
2. Coil in (-)
3. Pulse out
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.