Preliminary
LG90E
900 MHz FHSS DNT90/Ethernet Gateway
Optional 128-Bit AES Encryption
Point-to-point, Point-to-multipoint or Store and
Forward Operation
158 mW EIRP 900 MHz Transmitter Power
10/100Base-T Auto-sensing Ethernet Port
HTTP Posts, SimpleDB, XML and ModBus/TCP Support
900 MHz
Wireless
Ethernet
Gateway
The LG90E is the Murata family’s wireless Ethernet 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 LG90E’s DNT90 radio provides robust wireless communications. On the
wired side, the LG90E provides a 10/100Base-T interface to connect to virtually any
Ethernet network. In between is the intelligence to allow seamless integration of
DNT90 based devices into network or Internet cloud based applications. The wide
array of Ethernet and Internet protocols supported reduces the effort to tie LG90E
networks into existing sensing and monitoring applications. The LG90E gateway
shares the same API as the other Murata 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
Value
Units
Power Supply Input Voltage Range
Rating
-5 to +30
V
Non-operating Ambient Temperature Range
-40 to +85
ºC
Electrical and Mechanical Specifications
Specification
Sym
Notes
900 MHz Operating Frequency Range
Minimum
Typical
Maximum
Units
927.24
MHz
902.76
Spread Spectrum Modulation
Frequency Hopping (FHSS)
Modulation Type
FSK
Number of RF Channels
25, 26 or 52
RF Data Transmission Rate
100
kbps
Receiver Sensitivity
-100
dBm
40 or 158
mW
50
Ω
Transmitter EIRP Output Power Options
with Supplied 2 dBi Antenna
Optimum Antenna Impedance
Antenna Connector
Reverse SMA Male
Access Scheme
Ad Hoc TDMA
Point-to-Point, Point-to-Multipoint,
Store & Forward
Network Topologies
Network Integrity
Heartbeat Transmissions
Encryption
Copyright
© Murata
Manufacturing
Co.,N.A.,
Ltd. All
Rights Reserved 2010
©2010-2015
by Murata
Electronics
Inc.
LG90E (R) 04/14/15
128-bit AES
1 of 6
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Preliminary
Electrical and Mechanical Specifications (continued)
Specification
Sym
Notes
Minimum
RJ-45 Ethernet Port
Typical
Maximum
10/100Base-T, Auto-sensing
Ethernet Protocol
TCP/IP, UDP, ARP, ICMP, DHCP
Internet Protocol
ModBus/TCP, HTTP Posts, SimplexDB, XML
USB Diagnostic Console Port
Power Supply Input Voltage Range
Units
USB 2.0
VCC
+9
Current Consumption
+30
VDC
1.5
A
AC Power Supply
110/220 VAC Wall-plug Adaptor with
International Plug Set
Case Dimensions
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
Mounting
Operating Temperature Range
Operating Relative Humidity Range
1
-40
+85
ºC
5
95
%
Notes:
1.
Non-condensing humidity environment.
Copyright
© Murata
Manufacturing
Co.,N.A.,
Ltd. All
Rights Reserved 2010
©2010-2015
by Murata
Electronics
Inc.
LG90E (R) 04/14/15
2 of 6
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Preliminary
L G 9 0 E B lo c k D ia g r a m
R X +
1
R X -
R J -4 5
E th rn t
C o n n c to r
2
T X +
3
6
E th rn t
M A C /P H Y
µ P ro c s s o r
1
D +
2
D 3
4
A n t n n a
C o n n c to r
U S B
C o n
rt r
G N D
+ 9 to + 3 0 V
1
D N T 9 0
F H S S
R a d io
S D
C a rd
+ 5 V
U S B
C o n s o l
P o w r
n p u t
T X -
s o la tio n
T ra n s fo rm r
R
S w itc h in g
g u la to r s
2
+ 5 V
+ 3 .3 V
Figure 1
The LG90E provides a 10/100Base-T interface to
connect to virtually any Ethernet network, providing
seamless integration of DNT90 based remote
devices, such as the SN90R420, into network or
Internet cloud based applications. The LG90E
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 LG90E networks into existing sensing
and monitoring applications.
LG90E Operation
The LG90E is a robust wireless Ethernet gateway
for Murata’s DNT90 Frequency Hopping Spread
Spectrum (FHSS) radios. The DNT90 radio in the
LG90E 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 unit is packaged in a rugged aluminum enclosure, and ships with a universal wall-plug power
supply and a 2 dBi 900 MHz dipole antenna. The
LG90E is also compatible with Murata’s complete
line of 900 MHz antennas, allowing extended
operating range where allowed by local
regulations.
The switching regulators used in the LG90E support
a wide input voltage range, from +9 to +30 Vdc for
operation from battery-backed DC power sources.
ModBus/TCP support allows the LG90E gateway to
seamlessly deliver wirelessly collected sensor
readings using the ModBus/TCP standard protocol.
The LG90E in conjunction with DNT24-based nodes
provide a robust wireless data collection network
suitable for a wide range of ModBus automation
applications.
LG90E gateways support point-to-point or point-tomultipoint networks, with store & forward range
extension capabilities for large site operations.
Copyright
© Murata
Manufacturing
Co.,N.A.,
Ltd. All
Rights Reserved 2010
©2010-2015
by Murata
Electronics
Inc.
LG90E (R) 04/14/15
The LG90E is configured through an Ethernet port
using a built-in configuration utility formatted as a
web page.
3 of 6
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Preliminary
RJ-45 Ethernet Connector
Pin
Name
I/O
Description
1
TX+
O
This pin is the Ethernet positive differential output.
2
TX-
O
This pin is the Ethernet negative differential output.
3
RX+
I
This pin is the Ethernet positive differential input.
4
RESERVED
-
This pin is reserved for future use and should not be connected.
5
RESERVED
-
This pin is reserved for future use and should not be connected.
6
RX-
I
This pin is the Ethernet negative differential input.
7
RESERVED
-
This pin is reserved for future use and should not be connected.
8
RESERVED
-
This pin is reserved for future use and should not be connected.
USB Console Port Connector
Pin
Name
I/O
Description
1
+5 V
I
2
D+
I/O
This pin is the positive differential I/O port.
3
D-
I/O
This pin is the negative differential I/O port.
4
GND
GND
This pin is the +5 V USB Input
LG90E ground.
DC Power Terminal Block
Pin
Name
I/O
Description
1
+PWR
I
Positive power supply input, +9 to +30 V.
2
GND
-
LG90E ground.
LED Indicators
Pin
Name
I/O
1
ACTIVITY
O
Left-most LED on the front of the unit, amber color. Indicates RF communications activity.
Description
2
LINK
O
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.
3
POWER
O
Right-most LED on the front of the unit, green color. Indicates the unit is powered up.
4
ETH ACT
O
Upper-left LED on the RJ-45 Ethernet connector, green color. Indicates the Ethernet port is linked.
5
ETH LINK
O
Upper-right LED on the RJ-45 Ethernet connector, amber color. Indicates the Ethernet port
communications activity.
Copyright
© Murata
Manufacturing
Co.,N.A.,
Ltd. All
Rights Reserved 2010
©2010-2015
by Murata
Electronics
Inc.
LG90E (R) 04/14/15
4 of 6
www.murata.com
Preliminary
L G 9 0 E O u tlin
D r a w in 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.,
Ltd. All
Rights Reserved 2010
©2010-2015
by Murata
Electronics
Inc.
LG90E (R) 04/14/15
5 of 6
www.murata.com
Preliminary
Application Examples
L G 9 0 E /D N T 9 0 S
n s o r N
tw o rk
A p p lic a tio n
(P C )
n t rn
C lo u d
S
t
S N 9 0 R 4 2 0
n s o r N o d
L G 9 0 E
G a t w a y
Z N 9 0 M
R S -4 8 5 N o d
S N 9 0 R 4 2 0
n s o r N o d
S
Figure 3
P L C
C o n tr o ll d L G 9 0 E /D N T 9 0 S
S
n s o r N
N
P L C
tw o rk
M a s t r
tw o rk
S N 9 0 R 4 2 0
n s o r N o d
L G 9 0 E
G a t w a y
Z N 9 0 M
R S -4 8 5 N o d
S
S N 9 0 R 4 2 0
n s o r N o d
Figure 4
Specifications subject to change without notice.
M-0090-1000 Rev B
Copyright
© Murata
Manufacturing
Co.,N.A.,
Ltd. All
Rights Reserved 2010
©2010-2015
by Murata
Electronics
Inc.
LG90E (R) 04/14/15
6 of 6
www.murata.com