Wireless Sensors & Measurement

WiCOM-4-2-20

The Hastel WiCOM-4-2-20 provides a reliable, long range wireless solution for relaying a 4 to 20mA signal and 2 digital states from a sensor to the measurement system.

Replacing wires, conduit and trenching the battery operated WiCOM extends the reach of instrumentation, PLC, DCS and other systems

Specifications

Radio
- 16 channels
- 2.405 GHz to 2.480 GHz
- 9.6V battery pack
- 5 years battery life (average transmission interval)
The transmitter
- 9.6 volts battery
- 2 wire 4 to 20mA - polarity dependant.
- 16 bit resolution
- 1 volt free inputs
Receiver
- 2 wire, isolated, polarity dependant
- 16 bit resolution
- 2 open collector outputs

User defined parameters

Transmission interval (factory set on user request)

Features

• Battery operated transmitter
1 volt free inputs
The transmitter communicates with all our radio enabled equipment
Long range (up to 4 kilometers line of sight)
Licence free operation on 2.4GHz (802.15.4 LR-WPAN) - see FAQ below

FAQ

How often is the level transmitted?

Typically once every five minutes, but can be as often as 5 seconds

Doesn't WiFi interfere with your device?

The short answer is no! The longer answer is that it is designed to co-exist. Both WiFi and the CSMA-CA scheme used on 802.15.4 look for clear spaces to transmit into and therefore avoid 'collisions'.

Can the transmissions be seen or hacked?

No, the channels are different from WiFi and can't be snooped on by domestic equipment. In addition the very short bursts would be hard to capture and finally 128bit encryption may be employed.

The range seems long compared to my network at home, why?

The performance of the 802.15.4 transmission is between 7 and 18 dB better than that of 802.11b. This can be directly translated to a range increase from 2 to 8 times the distance for the same energy per bit, or an exponential increase in reliability at any given range. We also use the highest permissable levels of power.