AR-B1570 User’s Guide
3.2.18 COM1, COM2 (CN5, CN6)
CN5 (COM1) | CN6 (COM2) | ||||||
1 |
| 6 | 9 | 7 | 5 | 3 | 1 |
2 |
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3 |
| 7 |
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4 |
| 8 | 10 | 8 | 6 | 4 | 2 |
| 9 | ||||||
5 |
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CN5 | CN6 | Signal | CN5 | DB6 |
| Signal | |
1 | 1 | /DCD | 8 | 6 |
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| /CTS |
6 | 2 | /DSR | 4 | 7 |
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| /DTR |
2 | 3 | RXD | 9 | 8 |
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| /RI |
7 | 4 | /RTS | 5 | 9 |
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| VCC |
3 | 5 | TXD | 10 |
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| VCC | |
Table 0-3 RS-232 Connector Pin Assignment
(1) RS-232/RS-485 Select for COM1 (P2 & P3)
The P2&P3 jumper is used to choose between the use of the
P3 | 1 | 1 |
P2 | 2 | 2 |
| 3 | 3 |
| A B C | A B C |
RS-232 RS-485
Factory Preset
Figure 3-10 P2 & P3: RS-232/RS-485 Select for COM1
(2) RS-485 Terminator Select (J2)
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
1
2 
1
2 
OFF ON
Factory Preset
Figure 0-6 J2: RS-485 Terminator Select
(3) RS-485 Header (J9)
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| 1 | N485+ | |
1 | 2 | 3 | 2 | N485- | |
3 | GND | ||||
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| J9 |
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