Protech Systems SI-W309 User Manual page 8

Chapter 1 Introduction
1.1 SI-W309 Introduction
Thank you for purchasing our SI-W309: Industrial IoT (IIoT) Remote I/O Module
with 8 Channels Digital Input and 8 Channels Digital Output. SI-W309 Series is a set
of data acquisition and control modules that can be remotely controlled by using
Modbus RTU protocol. The communication interface between the module and the
host is RS-485 serial bus. The baud rate is software programmable and transmission
speed is up to 115.2 Kbps. SI-Wx09 Series provide Analog-to-Digital,
Digital-to-Analog, Digital Input / Output, Counters and other functions. All digital
input channels can be used as 32-bit counters. SI-W309 modules can communicate
with all computers and terminals. They use RS-485 transmission standards and
communicate with Modbus RTU protocol.
The RS-485 network only requires two wires, DATA+ and DATA-. A maximum of
256 SI-W309 modules can be connected to an RS-485 network, and the transmission
distance can reach up to 4000 feet. For the power requirements, the modules are
designed for standard industrial unregulated 24 VDC Power input; however, they
accept any power unit that supplies power within the range of +9 to +50 VDC.
1.2 Applications
 Building Automation
 Factory Automation
 Machine Automation
 Remote Maintenance
 Remote Diagnosis
 Testing Equipment
SI-W309 SERIES USER MANUAL
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