Campbell Scientific CSAT3B CSAT3B Three-Dimensional Sonic Anemometer - Page 51

CPI/RS-485 Communication Port Protocol, RS-485 Baud Rate, Unprompted Output Port, Unprompted Output

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CSAT3B Three-Dimensional Sonic Anemometer NOTE CPI/RS-485 Communication Port Protocol: RS-485 Enabled RS-485 Baud Rate: 115200 or other appropriate value Unprompted Output Port: RS-485 Port Unprompted Output Rate: 10, 20, 50 or 100 Hz Operating Mode: • Mode 3: Self-triggered | No filter | Unprompted output to PC, or • Mode 4: Self-triggered | Filtered | Unprompted output to PC (If Mode 4, select filter bandwidth.) To complete installation, connect a CSAT3BCBL2 to the Power/SDM port by screwing in the M16 connector into the port until tight. A CSAT3BCBL1 may also be used for power, but the SDM wires will not be used. The CSAT3BCSBL1 also has lighter gauge power wires, which increases voltage losses over long cable length, so it should only be used for shorter cable lengths. Next, connect a CSAT3BCBL3 cable to the CPI/RS-485 port in the same manner. If only one CSAT3B is being measured, the opposite end of the power cable should have pigtail wire leads, which may be connected to a 12 to 32 Vdc power supply, and the RS-485 cable should have pigtail wire leads for wiring to a connector on a PC (see FIGURE 7-16). Refer to TABLE 7-2 for a summary of the receive-and-transmit wiring. FIGURE 7-16. RS-485 cable connections 41

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CSAT3B Three-Dimensional Sonic Anemometer
CPI/RS-485 Communication Port Protocol:
RS-485 Enabled
RS-485 Baud Rate:
115200 or other appropriate value
Unprompted Output Port:
RS-485 Port
Unprompted Output Rate:
10, 20, 50 or 100 Hz
Operating Mode:
•
Mode 3:
Self-triggered | No filter | Unprompted output to PC, or
•
Mode 4:
Self-triggered | Filtered | Unprompted output to PC (If
Mode 4, select filter bandwidth.)
To complete installation, connect a CSAT3BCBL2 to the
Power/SDM
port by
screwing in the M16 connector into the port until tight.
A CSAT3BCBL1 may also be used for power, but the SDM wires
will not be used.
The CSAT3BCSBL1 also has lighter gauge
power wires, which increases voltage losses over long cable
length, so it should only be used for shorter cable lengths.
Next, connect a CSAT3BCBL3 cable to the
CPI/RS-485
port in the same
manner.
If only one CSAT3B is being measured, the opposite end of the
power cable should have pigtail wire leads, which may be connected to a 12 to
32 Vdc power supply, and the RS-485 cable should have pigtail wire leads for
wiring to a connector on a PC (see FIGURE 7-16).
Refer to TABLE 7-2 for a
summary of the receive-and-transmit wiring.
FIGURE 7-16.
RS-485 cable connections
NOTE
41