Wireless Sensor Interface - Hardware Specifications:
Frequency: 902 MHz to 928 MHz
Modulation: Frequency hopping spread spectrum, GFSK
Rx Sensitivity: -103 dBm
Tx Output Power: -15 dBm to +29 dBm
Total Link Budget: +136 dBm with 2dBi antennas.
Agency Certifications: FCC part 15, Industry Canada specification RSS-210,
CSA Class 1 Division 2.
Network Topology: Self-organizing, self-repairing, power optimized mesh network.
Security: 80-bit block encryption with user specified key.
Analog Inputs: Two inputs, jumper selectable for 0-2.5v or 0-20ma. The auto ranging, high-gain front end has a 76 microvolt resolution.
Discrete Inputs: Four dry contact inputs.
Pulse Accumulators: Each discrete input has an associated 32 bit accumulator. The max pulse input rate is 4Hz.
IO Expansion: The optional IO expansion board adds two analog inputs, three discrete inputs, and a form C relay output. The analog inputs are switch selectable for 0-2.5v, 0-5v, 0-10v, and 4-20ma.
Current Consumption: 45 uA average in idle mode, 16 ma in Rx mode, 17-1000 ma in Tx mode.
Input Power: Three size AA batteries: NiMh rechargeable (1.2vdc nominal), or lithium primary cell (1.5vdc nominal).
Battery Charging: Integrated solar panel or external 5vdc @ 300ma power supply for use with rechargeable batteries only.
Environmental: The circuit board is protected with a conformal coating and housed in a waterproof enclosure. The operating temperature range with lithium primary batteries is
–40 to +60 degrees C. The NiMh batteries are rated for operation from 0 to +50 degrees C.
