Introduction
There are two generations of Model WNM our Current
model and our older Legacy model.
The older Legacy version has four models:
900 MHz band:
WNM /ETHERNET/…/-900 MHZ/…
WNM/SERIAL /…/-900MHZ/…
2.4 GHz band:
WNM/ETHERNET/…/-2.4GHZ/…
WNM/SERIAL/…/-2.4GHZ/…
The Current version of the WNM began in June 2015
has only two models. The following changes are
made:
Both ETHERNET and SERIAL communications are
combined into a single Model number for a given
band. When there is a requirement for Ethernet
communications, or for serial communication, or for
both communications methods, then specify the WNM
Model number by:
900 MHZ band (specify for Ethernet or serial or both):
WNM/ETHERNET/…/-900MHZ/…
2.4GHZ band (specify for Ethernet or serial or both):
WNM/ETHERNET/…/-2.4GHZ/…
The Current WNM version Ethernet radios are slightly
larger in package size. Refer to Figures 2.
Both Legacy and Current versions of the WNM
ETHERNET radios are electronically compatible
with one another. You will be able to use both the
Legacy and Current version ETHERNET radios in
the same RF network. However you can not use
Legacy ‘SERIAL only’ type radios in a network with
ETHERNET radios since the earlier Legacy
‘SERIAL only’ type radios use a different internal
radio-to-radio modems.
It is routine to use the serial ports with the ETHERNET
radios (both Current & Legacy). The serial
communications uses packets within the Ethernet
radio-to-radio modems link to carry the serial
information. The Model WNM is not a
‘serial-to-Ethernet protocol converter’. Which means,
if the data originates on a serial port on one Model
WNM, then it will be communicated to the serial ports
(only) of the other Model WNMs. The same wording
applies Ethernet origin port to other Model WNM
radio(s) Ethernet destination (only) ports.
When using the serial ports on these Model WNM
Ethernet radios, use care to allow at the serial device
source and serial device destination for additional
‘store and forward’ minor time delays originating
from within the Model WNM modems. Some serial
protocols expect precise timing of an arriving signal or
a eld response signal. If the source (or destination)
device has parameter adjustments to allow for timing
delays, then experiment with these settings until all
occasional data dropouts are eliminated. These minor
time delays are more pronounced when additional
repeaters or low RF signal strengths are involved.
The Model WNMs do perform an automatic ‘resend’
of data if the rst transfer of data was not successful.
This ‘resend’ adds further minor timing delay. Ethernet
based communications use a different exibility in
‘timing’ of data and are very exible in handling routine
timing delays with no operator setup intervention.
Both versions of WNM radios are congured for
radio and network setups using the newer WNM
Cong program (available from the Moore Industries
Internet site which is included with the purchase
of your WNM radios). The Legacy version WNM
radios may use a wireless network using any of the
four (4) network setup protocols- but only if ‘all of the
radios’ on the network are only the rst version. The
available combinations may vary in the rst version
WNM radios if the Model WNM is ‘Serial only’ or an
Ethernet (with serial). For any combination of rst and
second version WNM radio networks specify only the
Point-to-Point network or the SSE- Smart Switched
Ethernet type of network. The SSE may be used for
any application. The SSE must be used for networks
with WNM repeaters.
The WNM (Wireless Network Modem) transceivers are
modern, high performance, wireless radio modems
designed for reliable industrial data communications in
the 902-928 MHz license-free band and in the
2.4 - 2.4835 GHz international license-free band.
These wireless modems employ advanced spread
spectrum frequency hopping and error detection
technology to achieve very reliable noise and
interference immune operation.
Both our Current and Legacy WNM models are
available in two frequency band versions according to
the intended communications (900 MHz or
2.4 GHz). The precise frequencies within each band
and maximum power levels are factory congured and
will vary for different countries. All WNM models are
covered in this manual. Both WNM Current models
support Ethernet and serial communications.
4 The Interface Solution Experts
WNM
Wireless
Network Module
