Version: 1.06 180
Serial Port (next)
C
ABLING
RS 485
Description:
RS485 communication
Connector: RS485
Screw connector (3 x 5.08 mm)
Cabling several CPU
together:
A to A
B to B
Gnd to Gnd
Gnd
A+
B-
Gnd
A+
B-
Gnd
A+
B-
1 2 3
1 2 3
1 2 3
About RS485 cabling:
1. Use a twisted pair for signal A and B.
2. RS 485 is not isolated. If cabling equipment in different building (different
Earth), you have to use ACC-RS485 (see your local distributor)
3. Maximum length depends on quality of cable, speed and quantity of
stations (max. 32 stations).
In good condition, guaranteed to 1.2 km (max. 32 stations @ 9600 Bps)
In practice, longer distance can be reached with lower Baudrate and less
station.
4. Cable: - Twisted pair (2 pairs)
- section: minimum 0.5mm²
- screening : pair and global screening
-
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