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Page 16 of 102
3.3.5 RS485 Interfaces (COM1 / COM2)
The Data logger possesses 2 full/half-duplex-capable RS485 interfaces that are controlled
independently from the configuration.
Figure 6: COM1 / COM2 (full/half-duplex)
Note
In the half-duplex operation of the interface COM2, 2 jumpers must be provided externally
(34-36, 35-37).
The interface COM1 is galvanically separated from the Data logger voltage supply.
Terminal 39
Terminal 40
Terminal 41
Terminal 42
Terminal 43
Terminal 34
Terminal 35
Terminal 36
Terminal 37
Terminal 38
COM 2
Terminal 41
Terminal 42
Terminal 43
Terminal 34
Terminal 35
Terminal 36
Terminal 37
Terminal 38
COM 1