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915U-2 Wireless I/O
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Expansion I/O
By default the RS485 port will be automatically enabled for “Expansion I/O “.
This means that when expanding the I/O all that is needed is to add the ELPRO Expansion I/O
module/s, e.g. 115S-11, 115S-12, or 115S-13 to the RS485 port and the I/O will automatically be
available from within the 915U-2’s I/O store. See User Manual for location addresses.
By default the Data Rate, Data Format will all be standard 9600, N81 and none for Flow Control
which matches the default Serial baud rate and data Format of the 115S serial expansion
module.
Serial parameters can be adjusted for compatibility or faster serial performance by adjusting
the rates and format and then selecting the “Save and Activate” Button.
Serial port parameters will also need to be changed on the expansion I/O module by using the
115S Configuration Utility which can be downloaded from the ELPRO Technologies Website
(www.elprotech.com)
Note: Be aware that using settings other than the default will mean new 115S serial
modules from the factory will require a configuration to change these serial settings.
RS232 / RS485 Port
Data Rate
RS232 / RS485 Serial Port Configuration
Select the desired functionality. Select either Modbus TCP / RTU or
Expansion I/O
The serial data rate desired. Serial data rates available range from
110bps to a maximum of 230,400bps.
Data Format
The data format desired. All the standard data formats are
supported.
Flow Control
Selects CTS/RTS or None
3.3 I/O Configuration
Figure 44 – I/O Configuration
The main I/O Configuration Selection page from where you select the I/O type that you wish to
configure.
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