Quick Start - Protech Systems SI-W509 User Manual

2.6 Quick Start

To install SI-W509 I/O module, follow the steps below:
1. Refer to Section 3.1 PIN Assignment for the pin assignment of terminal
block and Section 3.2 Application Wiring.
2. Open the Modbus utility for the host control.
3. Connect the module to the RS-485 network using the DATA+ and DATA-
(GND) terminals. If the host is only equipped with an RS-232 interface, an
RS-232 to RS-485 converter will be required. See Section 3.1 PIN
Assignment for terminal assignment.
4. Connect the pin 4 and pin 5 of the module (SI-W509) to the power supply
using the GND and +Vs terminals. See Section 3.1 PIN Assignment for
terminal assignment. Note that the voltage supplied to the module should
be in the range of +9 to +50 VDC.
5. Use the Modbus RTU Protocol and configure the module by using the
following commands:
 Read the Baud Rate Setting from the Holding Register (0x0020) by
sending "01 41 00 20" command to the module. Check the settings of
the module and utility are the same.
 To read data from Input channels by sending function code 02h to
read data from input channels.
SI-W509 SERIES USER MANUAL
Chapter 2 Getting Started
Page: 2-10