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Description | Qty | Source | Part Number | Link | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sensor Controller | 1 | iButtonLink | LinkHub-E 32K | |||||||
Power Supplies | 1 | iButtonLink | HubPwr5-NA | |||||||
Splitters |
(Likely a couple dozen of them) | iButtonLink | T-Box - 1-Wire Splitter | https://www.ibuttonlink.com/products/t-box (however likely any generic RJ-45 splitter would work) | ||||||
Sensors |
(Likely a couple dozen of them) | Maxim Integrated | DALLAS 18B20 1441C4 +800AB (label on devices used on ICON) | https://www.maximintegrated.com/en/products/sensors/DS18B20.html |
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Relevant Functional Block Diagram
The sensors are semiconductor devices with three pins:
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The sensor cables connect to the base via a custom cable, with an RJ-45 (ethernet) connector on one end and the sensors on the other. The base unit allows four sensor cables to be attached to it (with multiple sensors on each cable, like the one shown here).
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For the cable shown here a Winchester connector was used to allow the sensor section to be easily separated from the ethernet cable section. We will likely employ the same scheme for KPF.
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Note how the sensors can branch off the ‘main line', and also branch off the ‘branches’.
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Relevant Functional Block Diagram
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Note that we have separate cables, however the software interface does not differentiate by cable when it combines sensor IDs into a list.
connected onto short sections of ethernet cable with RJ-45 connectors. The sensors are daisy-chained together using regular ethernet cables and 1-wire RJ-24 splitters.
Connection scheme shown below to show the concept. This pattern is replicated for as many sensors as needed, with sections of regular ethernet cable used as needed to bridge sensor locations.
Note that while the cables are described here as ‘ethernet’, the communication protocol for these sensors is different than that used for computer networks.
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Cable Details
Cable | Qty | Details | Notes | ||||||
|---|---|---|---|---|---|---|---|---|---|
Ethernet (Computer) | 1 | Cat6 Copper Ethernet Cable M-M, 6 feet long | Entirely within Cal Rack. | ||||||
Ethernet (Sensors) |
| Cat6 Copper Ethernet Cable M-M, lengths as needed to span distances between sensors. | |||||||
Sensor Cable |
| Custom cable: short length of ethernet cable with sensor on one end and RJ-45 connector on the other. |
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Photos of Devices
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Sensor Name Look-up Tables
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Description | File | ||||
|---|---|---|---|---|---|
Instructions on how to change the device’s IP address over Telnet |
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Software Details
Note that we have separate cables, however the software interface does not differentiate by cable when it combines sensor IDs into a list.