ALTUS Nexto Series

3. INSTALLATION
Figure 8: DB9 Female Connector
Pin Sign Description
1 - Not used
2 Term+ Internal Termination, positive
3 TXD+ Data Transmission, positive
4 RXD+ Data Reception, positive
5 GND Negative Reference for External Termination
6 +5V Positive Reference for External Termination
7 Term- Internal Termination, negative
8 TXD- Data Transmission, negative
9 RXD- Data Reception, negative
Table 24: COM 1 (NX3004/NX3005) and COM 2 (NX3010/NX3020/NX3030)
3.5.1. RS-485 Communication without termination
In order to connect in a RS-485 network with no termination, the cable AL-1763 identified terminals must be connected in
the respective device terminals, as shown on table below.
AL-1763 terminals Device terminal signals
0 Shield
1 Not connected
2 D+
3 D+
4 Not connected
5 Not connected
6 Not connected
7 D-
8 D-
Table 25: RS-485 Connections without Termination
The figure diagram below indicates how the AL-1763 connection terminals should be connected in the device terminals.
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