900 MHz FHSS DNT90/GPRS Cellular Gateway
Optional 128-Bit AES Encryption
Point-to-point, Point-to-multipoint or Store and
Forward Operation
158 mW EIRP 900 MHz Transmitter Power
3G EVDO
Cellular Modem
HTTP Posts, SimpleDB, XML and ModBus/TCP Support
LG90C
DNT90/EV-DO
Cellular
Gateway
The LG90C is the
Murata
M2M family’s
EV-DO
Cellular Gateway for DNT90 900
MHz Frequency Hopping Spread Spectrum (FHSS) based products, including the
SN90xx series sensor modems and the ZN-90M RS-485 serial modems. On the 900
MHz side, the LG90C’s DNT90 radio provides robust wireless communications. On
the cellular side, the LG24C utilizes a
dual-band EV-DO
modem. In between is the
intelligence to allow seamless integration of 900 MHz DNT90 based devices into
network or Internet cloud based applications. TCP/IP Internet protocol support
reduces the effort to tie LG90C networks into existing sensing and monitoring
applications. The LG90C gateway shares the same API as the other RFM2M
gateway products, letting you pick the wireless technology that best suits your
requirements with only a minimum of changes to your application.
Absolute Maximum Ratings
Rating
Power Supply Input Voltage Range
Non-operating Ambient Temperature Range
Value
-5 to +30
-40 to +85
Units
V
ºC
Electrical and Mechanical Specifications
Specification
900 MHz Operating Frequency Range
Spread Spectrum Modulation
Modulation Type
Number of RF Channels
RF Data Transmission Rate
Receiver Sensitivity
Transmitter EIRP Output Power Options
with Supplied 2 dBi Antenna
Optimum Antenna Impedance
Antenna Connector
Access Scheme
Network Topologies
Network Integrity
Encryption
Sym
Notes
Minimum
902.76
Typical
Maximum
927.24
Units
MHz
Frequency Hopping (FHSS)
FSK
25, 26 or 52
100
-100
40 or 158
50
Reverse SMA Male
Ad Hoc TDMA
Point-to-Point, Point-to-Multipoint,
Store & Forward
Heartbeat Transmissions
128-bit AES
kbps
dBm
mW
Ω
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
LG90C (R) 04/14/15
1 of 6
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Electrical and Mechanical Specifications (continued)
Specification
Cellular Modem
Frequency Bands
RJ-45 Ethernet Port
Ethernet Protocol
Internet Protocol
USB Diagnostic Console Port
Power Supply Input Voltage Range
Current Consumption
AC Power Supply
Case Dimensions
Mounting
Operating Temperature Range
Operating Relative Humidity Range
Notes:
1.
Non-condensing humidity environment.
1
V
CC
+9
Sym
Notes
Minimum
Typical
EV-DO
800/1900
10/100Base-T, Auto-sensing
TCP/IP, UDP, ARP, ICMP, DHCP
ModBus/TCP, HTTP Posts, SimplexDB, XML
USB 2.0
+30
1.5
110/220 VAC Wall-plug Adaptor with
International Plug Set
7.30 x 4.67 x 1.5 inches
(185.4 x 118.6 x 38.1 mm)
Left and Right Flanges, Two Pre-drilled Holes
in Each Flange
-40
5
+85
95
ºC
%
VDC
A
MHz
Maximum
Units
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
LG90C (R) 04/14/15
2 of 6
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L G 9 0 C B lo c k D ia g a m
1
2
3
6
R X +
R X -
T X +
T X -
s o la tio n
T a n s -
fo m r
D N T 9 0
F H S S
R a d io
R J -4 5
E th
n t
C o n n c to
A n t n n a
C o n n c to r
S D
C a d
1
2
3
4
P o w r
n p u t
2
1
+ 5 V
D +
D -
G N D
+ 9 to + 3 0 V
U S B
C o n
t
µ P
S y s t m
o c s s o
U S B
C o n s o l
EV-DO
G P R S
C llu la r
M o d m
A n t n n a
C o n n c to r
S w itc h in g
R g u la to s
+ 5 V
+ 3 .3 V
Figure 1
LG90C Operation
The LG90C is a robust GPRS cellular gateway for
RFM’s DNT90 Frequency Hopping Spread Spectrum
(FHSS) radios. The LG90C’s DNT90 radio operates
in the 902 to 928 MHz ISM band, transmitting data
at 100 kbps with a power output of 40 or 158 mW
EIRP. The GPRS cellular modem provides gateway
connectivity in the 800, 900, 1800 and 1900 MHz
GSM bands.
The unit is packaged in a rugged aluminum en-
closure, and ships with a universal wall-plug power
supply a 2 dBi 900 MHz dipole antenna, and a four-
band GSM dipole antenna. The LG90C is also
compatible with RFM’s complete line of 900 MHz
antennas, allowing extended operating range where
allowed by local regulations.
The switching regulators used in the LG90C support
a wide input voltage range, from +9 to +30 Vdc for
operation from battery-backed DC power sources.
LG90C gateways support point-to-point or point-to-
multipoint networks, with store & forward range
extension capabilities for large site operations.
The
dual-band EV-DO
cellular modem provides
3G
connectivity through virtually any GSM
network, providing seamless integration of
DNT90 based remote devices, such as the
SN90R420, into network or Internet cloud
based applications.
The LG90C includes support for TCP/IP, UDP,
ARP, ICMP and DHCP Ethernet protocols, plus
ModBus/TCP, HTTP Posts, SimpleDB and XML
Internet protocols. This wide array of protocol
support greatly reduces the effort to tie LG90C
networks into existing sensing and monitoring
applications.
ModBus/TCP support allows the LG90C gateway to
seamlessly deliver wirelessly collected sensor
readings using the ModBus/TCP standard protocol.
The LG90C in conjunction with DNT90-based
nodes provide a robust wireless data collection
network suitable for a wide range of ModBus
automation applications.
The LG90C is configured through an Ethernet port
using a built-in configuration utility formatted as a
web page.
3 of 6
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
LG90C (R) 04/14/15
www.murata.com
RJ-45 Ethernet Connector
Pin
1
2
3
4
5
6
7
8
Name
TX+
TX-
RX+
RESERVED
RESERVED
RX-
RESERVED
RESERVED
I/O
O
O
I
-
-
I
-
-
Description
This pin is the Ethernet positive differential output.
This pin is the Ethernet negative differential output.
This pin is the Ethernet positive differential input.
This pin is reserved for future use and should not be connected.
This pin is reserved for future use and should not be connected.
This pin is the Ethernet negative differential input.
This pin is reserved for future use and should not be connected.
This pin is reserved for future use and should not be connected.
USB Console Port Connector
Pin
1
2
3
4
Name
+5 V
D+
D-
GND
I/O
I
I/O
I/O
GND
This pin is the +5 V USB Input
This pin is the positive differential I/O port.
This pin is the negative differential I/O port.
LG90C ground.
Description
DC Power Terminal Block
Pin
1
2
Name
+PWR
GND
I/O
I
-
Positive power supply input, +9 to +30 V.
LG90C ground.
Description
LED Indicators
Pin
1
2
3
4
5
Name
ACTIVITY
LINK
POWER
ETH ACT
ETH LINK
I/O
O
O
O
O
O
Description
Left-most LED on the front of the unit, amber color. Indicates RF communications activity.
Middle LED on the front of the unit, red color. On the base, this LED indicates one or more remotes are
linked to it. On a remote, this LED indicates it is linked to the base.
Right-most LED on the front of the unit, green color. Indicates the unit is powered up.
Upper-left LED on the RJ-45 Ethernet connector, green color. Indicates the Ethernet port is linked.
Upper-right LED on the RJ-45 Ethernet connector, amber color. Indicates the Ethernet port
communications activity.
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
LG90C (R) 04/14/15
4 of 6
www.murata.com
L G 9 0 C O u t l i n e D
r
a w i n g
0 .1 7 5
(4 .4 5 )
7 .3 0
(1 8 5 .4 2 )
0 .5 0
(1 2 .7 0 )
1 .5 0
(3 8 .1 0 )
0 .1 7 5
(4 .4 5 )
1 .2 5 0
(3 1 7 5 )
3 .4 2
(8 6 .8 7 )
4 .6 7
(1 1 8 .6 2 )
Figure 2
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
LG90C (R) 04/14/15
5 of 6
www.murata.com
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