Manual

WI-I/O 9-x Wireless Module User Manual v2.16
WI-I/O-EX-1-S-x Serial Module
Page 8
Chapter One INTRODUCTION
1.1 General
The WI-I/O 9-x & WI-I/O-EX-1-S-x range of I/O modules has been designed to provide standard “off-
the-shelf” telemetry functions, for an economical price. Telemetry is the transmission of signals over a
long distance via a medium such as radio or twisted-pair wire. Although the WI-I/O 9-x_WI-I/O-EX-1-
S-x is intended to be simple in its application, it also provides many sophisticated features. This
manual should be read carefully to ensure that the modules are configured and installed to give reliable
performance.
The unit can monitor and control the following types of signals:
Digital on/off signals
Example outputs - motor run, siren on
Example inputs - motor fault, tank overflow, intruder alarm
Analog continuously variable signals (0-20mA)
Example outputs - tank level indication, required motor speed
Example inputs - measured tank level, actual motor speed
Pulse frequency signals
Examples - electricity metering, fluid flow
Internal Status signals
Examples - analog battery voltage, power status, solar panel status and low battery
status.
The unit will monitor the input signals and transmit the signal information by radio or RS485 twisted
pair to another module or modules. At the remote unit, the signals will be reproduced as digital,
analog or pulse output signals. The modules also provide analog set points, so that a digital output may
be configured to turn on and off depending on the value of an analog input. The pulse I/O transmits an
accumulated value and the pulses are reliably recreated at the remote unit regardless of ‘missed’
transmissions. The actual pulse rate is also calculated and is available as a remote analog output.
This manual covers the WI-I/O 9-x and WI-I/O-EX-1-S-x modules. We have provided a summary on
all products available in the range, below.
• WI-I/O 9-1, WI-I/O 9-2, WI-I/O 9-3 and WI-I/O 9-4 modules have radio and serial
communications. The modules differ only in their input/output (I/O) design, and are compatible, i.e.
they can be used to communicate signals to each other in the same network. The WI-I/O 9-x has a
frequency hopping spread spectrum 900MHz radio which is license-free in many countries.
•