ROHS 6400AK Series User Manual page 35

special impedance 120 Ω, whose largest loading capacity is 32 payloads.
(Including master device and controlled device)
2. The transmission distance of RS 485
2400Bps
4800Bps
9600Bps
3. Connection mode and terminal resistance
a) RS 485 industrial bus standard requires that daisy chained ways should be
adopted among devices with 120Ω terminal resistors at both ends. The connection
can be simplified as that in picture 4, but "D" distance should not be more than 7
meters.
b) The connection mode of device terminal 120Ω：There are device terminal
resistances on controller board, which have two connection modes. One is the
factory default connection mode, without 120Ω resistor connected this time. When
120Ω resistor is required, the SK1 DIP switch on controller board should be pulled
into "ON" (As picture5). Then the 120Ω resistor is connected to circuits.
Intelligent Dome Camera (6400AK Series) User Manual
Band Rate Maximum Transmission Distance
1800M
1200M
800M
PIC 3
PIC 4
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