Remote Processing CX-10 - Manual (Page 20)

SERIAL PORTS BASIC SECTION 4
Page 4-3
CX-10
no RF modem
Modbus Master
RS-232 or
RS-485
Figure 4-2 Basic Connection
Modbus Master
RS-485
Additional CX-10 or
modbus device
Additional CX-10 or
modbus device
CX-10
no RF modem
Figure 4-3 Expanded IO and modbus devices
sure your master can operate as a 2 wire RS-485 if you
choose that method.
Figure 2 below shows the simplest configuration. The
CX-10 simply connects to a master via RS-232 or RS-
485 serial port. No RF modem is necessary
Use this configuration when you want to expand IO.
You can connect to the CX-10 using RS-232 or RS-485.
The next configuration allows for more CX-10 or
modbus devices on a RS-485 network.
The configuration in Figure 4-3 allows anywhere from 2
to 31 additional CX-10 or other modbus devices to
connect to a modbus master. Connections to all modbus
devices are through RS-485.
The following configurations use the RF modem. The
first example is shown in Figure 4-4 on the next page. A
number of CX-10's may be networked to a modbus
master unit.