Weidmuller WI-I/O-9-U2: Wireless Mesh I/O & Gateway User Manual de usuario descargar pdf (Pagina 28)

RS-485 port with Modbus Support.

The WI-I/O 9-U2 module provides an RS-485 serial port, which supports operations at

data rates up to 230,400 baud. Default baud rate is 9600 baud, No Parity, 8 data bits

and 1 stop bit which match the WI-I/O-EX-1-S serial expansion modules defaults. This

port Supports MODBUS protocol.

The RS-485 port terminal is hosted on the 4 way “Expansion” connector on the bottom

edge of the module. An on-board RS485 termination resistor provides line attenuation

for long runs. As a general rule moreover, a termination resistors should be placed at

each end of the RS485 cable. When using Expansion I/O module remember to

switch in the termination resistor on the end module.

Figure 10 – RS485 Connections

2.5.2 Side Access Configuration Panel

Figure 11 – Side Access Panel

On the side of the module is a small access cover that hides a “Factory Boot” switch,

USB Host port and a small bank of dipswitches that are used for Analog input

voltage/current selection, External Boot and Default configuration settings.

WI-IO 9-U2

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Weidmuller WI-I/O-9-U2: Wireless Mesh I/O & Gateway User Manual de usuario Pagina 28