Weidmuller WI-I/O-EX: Wireless I/O Expansion Modules v1.11 - Manual (Page 4)

WI-I/O-EX Serial I/O Module User Manual v1.11
Page 4 February 2010
APPENDIX E. RS232 WIRING .................................................................................... 55
1 Overview
The WI-I/O-EX modules are designed to provide I/O expansion for other products like
WI-I/O 9, WI-MOD-9-E and WI-MOD-E modules. The WI-I/O-EX modules support the
WI Series protocol, and communicate serially via RS232 or RS485. Configuration is
done via the WI Series configuration utility.
The WI-I/O-EX modules also support ModBus protocol. They may be used as a ModBus
slave with any 3 rd -party ModBus device, or with the WI-GTWY modules using ModBus.
They support both ModBus ASCII protocol, and serial un-signed ModBus RTU, also
known as “ModBus binary”. The ModBus slave address of the WI-I/O-EX is selected via
two rotary switches on the bottom panel of the case.
All WI-I/O-EX models provide digital inputs and outputs. Specific models provide
analog inputs or analog outputs. Pulsed inputs and pulsed outputs are also available.
Several modules may be connected to one master, allowing any combination of I/O types.
Figure 1-1 shows a diagram of a WI-I/O-EX module with parts labelled.