
RFN-500LG User’s Guide 
Document Number 
XXXX 
Revision 1 
Eaton’s Cooper Power Systems 
910 Clopper Road, Suite 201S 
Gaithersburg, MD 20878 USA 
www.eaton.com 
Tel (301) 515-7118 
Fax: (301) 515-4965 

Contents 
1 About the RFN500LG ............................................................................................................................. 3 
2 Regulatory Notices................................................................................................................................. 4 
3 RFN500LG Specifications ..................................................................................................................... 7 
XXXXX-01  2  RFN-500LG User’s Guide 

1  About the RFN-500LG 
The RFN-500LG is a radio communications device designed for use in L+G Focus 
meters. It can also be used in Eaton’s Cooper Power Systems Gateways and Relay 
Nodes. The RFN-500LG provides a 915 MHz radio interface to an RF mesh network. 
The RFN-500LG operates from a power source of 120 VAC to 277 VAC, received from 
the host device. It may also be powered from a 12VDC power source. The supplied 
voltage is then regulated to 5.0 VDC and 3.3VDC by the on-board power supply circuit. 
The radio modules operate in license-free bands at 915 MHz (902.75 to 927.25 MHz). 
RFN-500LG Nodes are fully compatible with mesh network hardware, protocols and 
operations. Five radio transmission data rates are available: 9.6 kb/s, 19.2 kb/s, 38.4 
kb/s, 76.8 kb/s and 153.6 kb/s. The transmission power of the 915 MHz radio is 
adjustable from 30 dBm to -20 dBm. 
XXXXX-01  3  RFN500LG User’s Guide 

The Original Equipment Manufacturer (OEM) must ensure that FCC 
Labeling requirements are met. This includes a clearly visible label on the 
outside of the OEM enclosure specifying the Cooper Power Systems FCC 
identifier (FCC ID: P9X-500LG) and IC Number (IC: 6766A-500LG) as well 
as the FCC Notice below. 
This device complies with Part 15 of the FCC Rules. Operation is subject to 
the following two conditions:  
(1) This device may not cause harmful interference, and 
(2) This device must accept any interference received, including interference that 
may cause undesired operation. 
Le présent appareil est conforme aux CNR d'Industrie Canada applicables 
aux appareils radio exempts de licence. L'exploitation est autorisée aux 
deux conditions suivantes: 
(1) l'appareil ne doit pas produire de brouillage, et 
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, 
même si le brouillage est susceptible d'en compromettre le fonctionnement. 
Changes or modifications not expressly approved by the party responsible 
for compliance could void the user’s authority to operate the equipment. 
This equipment has been tested and found to comply with the limits for a 
Class B digital device, pursuant to part 15 of the FCC Rules. These limits 
are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate 
radio frequency energy and, if not installed and used in accordance with the 
instructions, may cause harmful interference to radio communications.  
However, there is no guarantee that interference will not occur in a particular 
installation. 
If this equipment does cause harmful interference to radio or television 
reception, which can be determined by turning the equipment off and on, the 
user is encouraged to try to correct the interference by one or more of the 
following measures: 
 Reorient or relocate the receiving antenna.  
 Increase the separation between the equipment and receiver.  
 Connect the equipment into an outlet on a circuit different from that to 
which the receiver is connected. 
 Consult the dealer or an experienced radio/TV technician for help. 
2  Regulatory Notices 
XXXXX-01  4  RFN-500LG User’s Guide 

The installer of this radio equipment must ensure that the antenna is located 
or pointed such that it does not emit RF field in excess of Health Canada 
limits for the general population; consult Safety Code 6, obtainable from 
Health Canada’s website www.hc-sc.gc.ca/rpb. 
To comply with FCC RF exposure compliance requirements, the antenna 
used for this transmitter must be installed to provide a separation distance of 
at least 20 cm from all persons and must not be co-located or operate in 
conjunction with any other antenna or transmitter.” 
As such, the radio component of this device is intended only for OEM 
integrators under the following two conditions: 
The antenna must be installed such that 20 cm is maintained between the 
antenna and users. 
The transmitter module may not be co-located with any other transmitter or 
antenna. 
As long as the two conditions above are met, further transmitter testing will 
not be required. However, the OEM integrator is still responsible for testing 
their end product for any additional compliance requirements required with 
this module installed (e.g., digital device emissions, PC peripheral 
requirements). 
In the event that these conditions cannot be met (for example, co-location 
with another transmitter), then the FCC authorization is no longer considered 
valid and the FCC ID cannot be used on the final product. In these 
circumstances, the OEM integrator will be responsible for re-evaluating the 
end product (including the transmitter) and obtaining a separate FCC 
authorization. 
End Product Labeling 
This transmitter module is authorized only for use in devices where the 
antenna may be installed such that 20 cm may be maintained between the 
antenna and users (for example access points, routers, wireless ASDL 
modems, certain laptop configurations, and similar equipment). The final 
end product must be labeled in a visible area with the following: 
“Contains FCC ID: P9X-500LG, IC: 6766A-500LG”. 
The radio component is an integral part of the RFN-500LG and cannot 
be removed. 
XXXXX-01  5  RFN-500LG User’s Guide 

Transmitters with Detachable Antennas 
This device has been designed to operate with the antennas listed below, 
and having a maximum gain of 5 dB. Antennas not included in this list or 
having a gain greater than 5 dB are strictly prohibited for use with this 
device. The required antenna impedance is 50 ohms. 
Antennas that may be used with this product include: 
  Linx ¼ Wave Through-hole Helical, 2.4dBi 
  Omnidirectional Molex P-N 1052620003, 1.2dBi 
  Laird OD9-5-ANT 900MHz Omnidirectional - 5 dBi 
  Laird B(B)8965CN 5/8 Wave Loaded Coil 900MHz Omnidirectional 
Antenna, 5dBi 
To reduce potential radio interference to other users, the antenna type and 
its gain should be so chosen that the equivalent isotropically radiated power 
(e.i.r.p.) is not more than that permitted for successful communication. 
XXXXX-01  6  RFN-500LG User’s Guide 

Reliable data transmission 
Error detection, correction and retransmission 
30 dBm (maximum) to -20 dBm 
9.6 kb/s, 19.2 kb/s, 38.4 kb/s, 76.8 kb/s, 153.6 kb/s 
-114 dBm (@ 1.0% PER, 9.6 kb/s, +25° C 
Range (w/ omni antenna) Outdoor 
75 – 150 m (225 – 490 ft) 
Frequency Hopping Spread Spectrum (FHSS) 
Mechanical Specifications 
-40° C to +85° C 
0 – 95% non-condensing humidity 
AC 120-277V, DC 12V (regulated to 5.0 VDC and 3.3 VDC onboard) 
3  RFN500LG Specifications 
XXXXX-01  7  RFN-500LG User’s Guide 

Eaton’s Cooper Power Systems 
910 Clopper Raod, Suite 201S 
Gaithersburg, MD 20878 USA 
www.eaton.com 
Tel (301) 515-7118 
Fax: (301) 515-4965