Power One VSN-MGR-CMML SERIES, Installation Manual

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17
4 Adding a Weather Station
Weather stations are wired to the Primary RS-485 port on the Aurora Logger.
1. Connect shielded twisted-pair wire to the RS-485 terminals on the
weather/environmental station. Use a RS-485 data wire with one twisted pair, one
ground conductor, and a shield with drain wire (Belden#3106A or equivalent).
DO NOT USE CAT5/6 CABLE FOR THE RS-485 DATA WIRE.
2. Connect other end of shielded twisted-pair wire to RS-485 terminals on the Aurora
Logger. Use the table below and the figure on the next page to make the proper
connections.
RS-485 Screw Terminal
RS-485 Connection
Aurora Logger RS-485
Screw Terminal Connector
Example Aurora Inverter
RS-485 Pin Label
Example Aurora Environmental
RS-485 Pin Label
RS-485 Negative (-) 1 -TR (Port 5) ----
RS-485 Positive (+) 2 +TR (Port 4) ----
RS-485 Negative (-) 3 ----- RS-485 A(-)
RS-485 Positive (+) 4 ---- RS-485 B(+)
Ground 5 RTN (Port 3) RS-485 GND, GND
VDC Power Only 6 N/A 24VDC
Note that multiple weather stations can be supported if daisy-chained to the Primary
RS-485 port and each is given a unique Modbus address.
3. The Weather Station can tap the power terminals on the Aurora Logger for its power
source. The VSN-ENVIRO-ENTRY and VSN-ENVIRO-CMML models (as well as most
other commercial weather stations) can use +12VDC as the power voltage. Using the
Aurora Logger as the power source is optional; any appropriate VDC power source that
meets the specifications of the Weather Station may be used. To use the Aurora Logger
as the power source for the Weather Station, connect shielded twisted-pair wire to the
power terminals on the weather/environmental station.
DO NOT USE CAT5/6 CABLE FOR THE POWER WIRES.
+12VDC Power, Port 6
Ground, Port 5
Primary RS-485 Connectors,
Terminal 3 (D-) and
Terminal 4 (D+)