Zigen AX-88 Audio - Manual (Page 18)

Matrix Switching System—User Manual
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6.0.5.2 RS-485
RS-485 is a standard defining the electrical characteristics of drivers and receivers for
use in balanced digital multipoint systems. Digital communications networks
implementing the RS-485 standard can be used effectively over long distances and in
electrically noisy environments. AX-88 supports up to two RS-485 ports allows you to
control more than one Matrix Device. If the master device is specified for IPM, it allows
you to control all the series devices with web browser. When connecting in parallel,
Matrix device ID must be unique.
Figure 6-9 RS-485 Connection
See Pin definitions as below:
RS-485
+ - + -
Figure 6-10 RS-485 Port
Serial connection between Matrix RS-485:
Pin1 TX（+） TX（+）--- Transmitted Data +
Pin2 TX（-） TX（-）--- Transmitted Data -
Pin3 Gnd (Ground)
Pin4 RX（+） RX（+）--- Received Data +
Pin5 RX（-） RX（-）--- Received Data -
 RS-232 and RS-485 baud rates: 9600bps, no odd or even calibration address, 8bit
data transmission address, 1bit stop address (96, N, 8, 1).