System Architecture - Protech Systems SI-W309 User Manual

Chapter 2 Getting Started

2.1 System Architecture

The System Architecture diagram is shown as below:
Host Computer/ Edge Controller Gateway
Any computer, terminal or Edge controller Gateway can transfer data with
Modbus RTU Protocol by using RS-232 or RS-485 serial interfaces. When
only RS-232 is available, an RS-232 to RS-485 converter is required to
convert the signals to the correct RS-485 data format. The Modbus protocol is
easy to integrate Modbus compatible equipment into monitoring and control
applications.
Remote I/O Module
SI-Wx09 is the series of the Remote I/O Modules which are designed by
Protech Systems. The bottom side I/O of the module include RS-485 interface
and power supply. The interface of communication is the RS-485 with 3-wire
unregulated connector.
The modules accept any power unit that supplies power
For the standard power unit, they
within the range of +9 to +50 VDC. are designed
for standard industrial unregulated 24 VDC Power input.
The top side I/O of the module is the I/O channels for monitoring and control.
It
provide Analog-to-Digital, Digital-to-Analog, Digital Input / Output, Relay output,
Counters and other functions.
SI-W309 SERIES USER MANUAL
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