An adaptor to connect to compatible data loggers

The 12-Bit 4–20 mA Input Adapter is used for sensors with 4–20 mA current loop outputs and is designed to work with the HOBO® stations. The input adapter features both a battery-saving switched input and a non-switched input. It also provides a trigger source voltage for controlling power to external sensors, while offering digital filtering that improves measurement accuracy with 32 readings/sample and 60 Hz noise rejection. The input adapter has a plug-in modular connector that allows it to be added easily to a HOBO station.

Features

• 12-bit resolution
• Digital filtering improves measurement accuracy with 32 readings/sample; 4-20 mA adapter has 60 Hz noise rejection
• Measurement averaging over logging interval further enhances accuracy
• Plug-in modular connector for easy interface with HOBO stations
• Screw terminal for connecting to sensors
• HOBO RX3000 and U30 stations have room for two adapters
• Use with HOBO USB Micro Station and HOBO MicroRX Station requires Smart Sensor Consolidator Box (S-ADAPT-6) and an extension cable
• Represents one data input channel

 

Measurement Range*	4–20 mA
Accuracy	± 0.1 mA (± 0.5% full scale) over full temperature range of -40°C to 75°C (-40°F to 167°F)
Resolution	±4.93 µA
Input Impedance	124 Ω
Switched Input	Maximum switch voltage above ground (Pin 2 to Pin 1): 20 V Maximum switch current: 50 mA On time: 316.6 ms ±3%
Sensor Trigger: Source	Voltage: 2.5 V ±2.4%; maximum current: 1 mA On time: 12.7 ms ±3%
Operating Temperature Range	-40°C to 75°C (-40°F to 167°F)
Housing	Plastic case; must be placed inside logger enclosure to protect from direct exposure to the weather
User Connection	Six-position screw terminal strip (16–30AWG); shielded cable recommended with outside diameter of 3.2 to 3.8 mm (0.125 to 0.150 in.)
Dimensions	4.5 x 4.8 x 1.6 cm (1.8 x 1.9 x 0.6 in.)
Weight	25 g (0.88 oz)
Number of Data Channels**	1
Measurement Averaging Option	Yes
Digital Filtering	Automatic digital filtering with 32 readings/sample in 16.6 ms
Bits per Sample	12
Length of Smart Sensor Network Cable**	14 cm (5.5 in.)
	The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

* The input adapter can provide readings as low as 0 mA. This can be helpful when diagnosing sensor issues such as open inputs.
** A single station can accommodate 15 data channels and up to 100 m (328 ft) of smart sensor cable (the digital communications portion of the sensor cables), although available space in the enclosure may limit the number of sensors you can attach.