Serial Communications Ports - Toshiba Black Pear Installation And User Manual

4.3 Serial Communications Ports

These connectors provide access to the Modbus registers using RS232 or 2-wire RS485.
The port configuration is as follows:
Modbus RTU
9600 baud, 8 data bits, no parity, 1 stop bit
Serial Comms
Port
The RS485 interface can be used on a compatible serial communications network shared
by multiple RS485 devices. The 'Base Slave Address' must be set to prevent multiple units
using the same slave numbers.
It is recommended that screened twisted-pair cable is used.
RS485-A is the non-inverting signal and is also named RS485+
RS485-B is the inverting signal and is also named RS485-
Common should be connected to the cable screen.
Pin 2
Pin 3
Pin 5
Fig. 2 RS232 Comms Lead Wiring Diagram
Serial Comms
Port
Fig. 3 RS485 Comms Lead Wiring
9 PIN D-SUB FEMALE
RS485-A
RS485-B
Common
Diagram
6
To PC
Comm Port
RS485
network
A B