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IP-67; sealed unit for direct outdoor installation. Protected from dust and momentary water immersion. Terminal strip connections are internal and I/O wiring is handled via sealing gland type fittings. Power and communication is via integral 5 pin Euro style connector. Mating 6’ cable with connector on one end and pigtails on other is included. |
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IP-20: sealed unit with exposed terminal strips. Typically installed indoors or within a protective enclosure. These devices if housed properly are capable of being deployed in Class I, Division 2, Group A, B, C, D T3A −40 to 80° C environments. |
The Nodes utilize the unlicensed 900MHz band and utilize Frequency Hopping Spread Spectrum (FHSS) technology to maximize immunity to interference.
Operation
In operation, the Nodes run autonomously, sampling their inputs based on a user defined sampling and reporting rate and communicating these values back to the Gateway radio which is attached to the IntelliLogger™. The IntelliLogger™ then utilizes these readings as required by its user defined Program Net by reading the Node sensed values from the Gateway memory.
Power
Nodes can be powered from an external power source (eg a 12Vdc wall power adapter or battery) or the Nodes can be provided with integral high energy lithium batteries or self-contained photovoltaic charging systems. Two different “power consumption” families of Nodes are available… one family is designed for line powered (or more substantial power source) applications and the other implements very low-power circuit design for battery operation. A slightly different mix of I/O is available in each family.
Line Powered (10-30Vdc)
Line powered Nodes require 10 to 30Vdc input and since they are assumed to be powered from an “unlimited energy” source, they are set to sample their inputs every 62.5mS (can be changed) which results in a higher power consumption rate. Additionally some of the Line Powered models have analog outputs (eg 0-20mA) which require full time power for non-interrupted operation. Line powered Nodes can be powered from battery or rechargeable (eg photovoltaic) power supplies however their higher power draw must be taken into consideration in application design.
Flex-Power (low power)
Flex-Power Nodes are commonly deployed in battery powered applications. They are configured to sample their inputs at a slower rate conserving power and do not have high power consuming analog outputs. Additionally, some models include switched outputs that can be used to momentarily turn on power to excite a sensor, take a reading and then turn the power off. Flex-power Nodes are commonly used with sensors that require little or no excitation (eg RTD’s, thermocouples and switch type inputs) Flex-Power Nodes can be powered from 10 to 30Vdc or 3.6 to 5.5Vdc which allows them to be powered by lithium battery packs as well as specially designed low-voltage photovoltaic systems.
Antennas
The Nodes are shipped with an integral 8” long 2dB omni-directional flexible antenna that suffices for most applications. Optional antennas for more demanding applications can be provided.
Node Configuration
Configuration of the Nodes amounts to setting various parameters particular to the Node prior to deployment such as: Wireless network address Units (eg C or F for temperature inputs) Input type (eg thermocouple type) Sampling resolution Sampling rate Reporting rate Input/Output functions
Node Offering – Line Powered Models (10–30Vdc Supply)
Note: See [Discrete I/O Explained] for terminology explanation. |
