Chapter 6: Reference
HOBO U30 Remote Monitoring System User’s Guide
59
HOBO U30 Remote Monitoring System
Alarm Output Relay
One relay contact closure can be
configured as normally open, normally
closed, or pulsed.
Sensor Network Cable
Length
100 m (328 ft) maximum
External Power
External power is required. The system
optionally accepts the following Onset solar
panels (see the next section):
SOLAR-1.2W
SOLAR-3W
SOLAR-6W
Alternatively it accepts an AC power
adapter:
AC-U30
Specification
Approval pending
FCC Specification
Approved for use in the USA, Contains
FCC ID QIPTC65
Optional Analog Sensor Port Specifications
Input Channels
Two, single-ended
Field Wiring
Two- or three-wire via screw terminals on
detachable connector, 16–24 AWG.
Replacement detachable connectors: Part
of spares kit, Part No. A-FS-CVIA-7P-1
Input Range
User-configurable: 0–20 mA DC, 0–20
VDC (suitable for 2.5, 5, 10V sensors)
Minimum / Maximum Input
Voltage
0 / 24 VDC
Minimum / Maximum Input
Current
0 / 24 mA DC
Minimum Current Source
Impedance
> 20 K
Ω
Accuracy
± 0.25% of FSR from 50mV to FSV
ADC Resolution
12 bits
Chapter 6: Reference
60
HOBO U30 Remote Monitoring System User’s Guide
Supported Smart Sensors and Accessories
The U30 supports the following Smart Sensors:
•
Barometric Pressure
S-BPB-CM50
•
4-20mA Input Adapter
S-CIA-CM14
•
Leaf Wetness
S-LWA-M003
•
Photosynthetic Active Radiation (PAR)
S-LIA-M003
•
Rainfall
S-RGA-Mxxx, S-RGB-Mxxx
•
Silicon Pyranometer (solar radiation)
S-LIB-M003
•
Soil Moisture
S-SMA-Mxxx, S-SMB-Mxxx, S-SMC-Mxxx
•
Temperature (12-bit)
S-TMB-Mxxx
•
Temperature/Relative Humidity (12-bit)
S-THB-Mxxx
•
12-bit Voltage Input Adapter
S-CIA-CM14
•
Pulse Input Adapter - Electronic Switch
S-UCC-M006
•
Pulse Input Adapter - Contact Closure
S-UCD-M006
•
Wind Speed and Direction
S-WCA-M003