Campbell CSAT3B, Instruction Manual, Page: 26 / 88

CSAT3B Three-Dimensional Sonic Anemometer
distance from the datalogger, the HUB-SDM8 can be placed near the
CSAT3Bs with a single SDM cable extended from the hub to the datalogger.
This decreases the total network cable length, which limits signal attenuation.
The HUB-SDM8 has eight terminal strips and features spring-loaded guillotine
terminals for easy wiring. It comes in a watertight enclosure and includes a U-
bolt for mounting to a vertical pipe or mast. An SDM Cable (CABLE5CBL-L;
see Section 5.2.4.4, SDM Cable CABLE5CBL-L ) should be ordered to connect
the HUB-SDM8 to a datalogger and a power supply.
FIGURE 5-10. HUB-SDM8 for multiple CSAT3B connections with SDM
communications
5.2.4.4 SDM Cable CABLE5CBL-L
The SDM cable, CABLE5CBL-L, is a 22 AWG, five-conductor cable with a
Santoprene jacket and an aluminum Mylar ® shield. By default, the conductors
are stripped and tinned.
The CABLE5CBL-L is used to connect the power and SDM connection from a
HUB-SDM8 to the power and SDM connections on a power source and
datalogger.
5.2.4.5 HUB-CPI
The HUB-CPI (pn 30692) allows up to eight CPI devices to be connected
together in parallel. In the case of the CSAT3B, up to seven CSAT3Bs, or
CSAT3B daisy-chains using CSAT3BCBL3 cables, may be connected in
parallel to the HUB-CPI. The remaining port may be used with a CAT5e or
CAT6 Ethernet cable (see Section 5.2.4.4, SDM Cable CABLE5CBL-L ) to
connect the HUB-CPI to the CPI port on a datalogger such as the CR6.
The HUB-CPI (shown in FIGURE 5-11) is not weatherproof and should be
housed in an enclosure, typically alongside the datalogger.
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