iSMA-B-W0202 User Manual
www.ismacontrolli.com
DMP263en | 1st Issue rev. 3 | 05/2022
page 4 of 41
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1 Introduction
The iSMA-B-W0202 has been built as an extension of Modbus serial bus by using wireless
technology, wherever the use of network cable is impossible or unprofitable. Using two
iSMA-B-W0202 modules allows to build a wireless 'bridge' for the RS485 by building
wireless remote island (one or more) for devices, which communicate via Modbus RTU/
ASCII, e.g., iSMA-B-MIX18 or iSMA-B-MIX38.
The iSMA-B-W0202 (in addition to the RS485 port and wireless port) is equipped with 2
special inputs and 2 digital outputs (max. 230 V AC/30 V DC, 3 A). It allows to use the
device as an I/O module or light controller communicating with Modbus RTU/ASCII.
Algorithm implemented in the processor allows the user to choose one of the three
different modes:
Modbus Bridge;
Modbus Bridge and I/O module (digital outputs work independent to special inputs);
Modbus Bridge and light controller (digital output states depend on assigned special
inputs). There are different operating modes available (see Special Application Modes
section).
The iSMA-B-W0202 is also equipped with a micro USB port, which allows to configure the
device without the use of an external power supply (the device is powered through the
USB port). This solution gives the user an easy way, using 2 laptops, to carry out the tests
within the existing facility.
Figure 1. iSMA-B-W0202 wireless module
