Acrosser AR-B1565 - Manual (Page 25)

AR-B1565/1565A User’s Guide
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17 –DTR2F 18 –RI2F
19 VCOM2 20 GND
21 –DCD3F 22 –DSR3F
23 RXD3F 24 –RTS3F
25 TXD3F 26 –CTS3F
27 –DTR3F 28 –RI3F
29 VCOM3 30 GND
31 –DCD4F 32 –DSR4F
33 RXD4F 34 –RTS4F
35 TXD4F 36 –CTS4F
37 –DTR4F 38 –RI4F
39 VCOM4 40 GND
(1) RS-232/RS-485 Select for COM3 (J6 & J8)
The J6&J8 jumper is used to choose between the use of the on-board RS-232 or RS-485 for the COM3.
J6
1
3
5
1
2
3
J8
RS-232
Factory Preset
J6
1
3
5
1
2
3
J8
RS-485
Figure 3-10 J6 & J8: RS-232/RS-485 Select for COM3
(2) RS-485 Terminator Select (J7)
When there is only one line the setting should be left off, but if you are using multiple blocks on a single line
this should be set to “ON” in order to properly terminate the connection for better transmission of data
OFF
Factory Preset
1
2 1
2
ON
Figure 0-5 J7: RS-485 Terminator Select
(3) RS-485 Header (J8)
1 2 3
1 N485+
2 N485-
3 GND