Ruggedized WISE 4-20
Spread Spectrum Modbus Radio Modem with 4-20 mA Current
Loop, Serial, Discrete, Pulse Counter and Modbus
WISE 4-20 available at 50
MHz, 900 MHz and 2.4 GHz or VHF and UHF licensed
frequency bands with up to 8 4-20 ma analogs (16 bit),
8 discretes, 1 pulse counter (for flowmeter applications)
or 1 serial interface. WISE Host unit has identical
I/O and is also available with a serial port,
allowing remote site monitoring and control
WISE 4-20 is a comprehensive
line of industrial grade, frequency hopping spread
spectrum and remote radio telemetry modems with
unified I/O features for industrial applications.
Link a single sensor to your data acquisition network
or use WISE 4-20 to build SCADA systems, long
range links and regional wireless data acquisition
and remote control networks.
The WISE system is designed to reliably and securely
replace cable in industrial applications. Each
WISE remote accepts up to eight 4-20 mA analogs,
eight discretes, 1 pulse counting or one RS232/485
input. All I/O is replicated at the WISE host
- including analogs with full 16 bit precision.
The link between remote and host is a secure,
error-protected digital radio operating at 50 MHz,
900 MHz or 2.4 GHz, or a licensed 150 MHz or 450
radio, at VHF or UHF.
WISE radios are shipped factory-configured and tested.
There is no field configuration necessary. Typical
installation involves simply mounting and powering
the units and connecting the antennas and I/O.
A convenient 'Test' button is provided on both
remote and host units to allow verification of
Both the 900 MHz and 2.4 GHz systems utilize frequency
hopping spread spectrum with advanced protocols
that greatly increase the communications reliability
in high noise and interference environments.
The WISE remote is located nearest the sensor(s)
and includes 4-20 mA, discrete or digital serial
interfaces, as well as the complete radio,
antenna, optional battery and solar power
sub-systems. An optional sensor power supply sources 5 - 48 VDC. All is self-contained in the IP 65
cast aluminum enclosure, with three indicator
LED's, two water-tight I/O connectors and a Test
button - used to verify overall WISE system operation.
There is absolutely nothing to calibrate or configure.
Our engineers have created WISE I/O options that
support a broad range of legacy industrial
interfaces and protocols including Modbus.
This flexibility allows very extensive data acquisition
links and networks to be created from our product
For example, you can connect a WISE Host directly
to RS-232, creating a wireless node
capable of polling a large number of WISE remotes
using Modbus protocol. The system can be constructed
seamlessly using different WISE radio types, combining
long range links with short range (area) coverage.
Each WISE remote acquires analogs and discretes
from the field, and can also be commanded to output
analogs and relay closures. Essentially, each
remote performs the role of a flawlessly integrated
radio + PLC - without the associated cost.
WISE Repeaters are used whenever either distance
or major obstructions cause the radio signals
to be weak. We offer several versions, including
one for each radio type, plus a high-speed repeater
that uses the NEMA 2.4 GHz radios shown in the
photo. Data is processed through all Repeaters
in digital form so sensor reading accuracy is
2.4 GHz Radio Mounts at Antenna
Long runs of coaxial cable at 2.4 GHz are
expensive and lossy. The WISE NEMA 2.4 GHz
radio module allows you to place the radio
right at the antenna.
WISE NEMA 2.4
GHz FHSS Radio
Signals and power are fed to
the radio with an inexpensive Category 5
cable run, up to 150' long, terminated in
a standard RJ-45 connector. On the ground,
the connector mates with the standard WISE
'Black-Cube' which can be conveniently located
near the sensor (4-20, etc.) interfaces.
As with all WISE products, everything comes
factory-configured and tested - no field
configuration is required. -40°C to
+ 70°C operation - NEMA 4X rated.
Synetcom specifies a 40 mile (900 MHz 1 watt
or VHF licensed 5 watt)
range that includes
a 20 dB margin (if the signal fades as much as
20 dB - a factor of 1/100 - the link
continues to operate).
Obstructions in the line of sight path
reduces range, depending on the type of
obstruction. Contact our factory for
|Radio Choices: o For short range (<1000')
indoor or outdoor applications, the low
power 900 MHz
system is recommended - lowest cost and robust over shorter
distances, even with obstructions.
o For moderate range (1000' - 5 miles),
choose the 900 MHz 1 watt radio for most applications,
especially those that don't have line of
o For longest range (5 - 40 miles), choose the
1 watt 900 MHz radio or 5 watt VHF/UHF
o If the link must be secure or if long
range is needed at 900 MHz, choose the 256
bit AES encrypted 1 watt 900 MHz radio (40
The WISE Remote captures analog sensor readings
with self-calibrating 24-bit sigma delta A/D technology.
Sigma delta incorporates high sample rates and
decimating digital filters to achieve excellent
precision, accuracy and stability over temperature
and time. The A/D features high frequency noise
and hum suppression approaching 100 dB.