Westermo MRD-315 User manual

©Westermo Teleindustri AB
MRD-315, MRD-355 & MRD-455
Industrial Mobile Broadband Router
GSM / GPRS / EDGE / 3G /
HSDPA / HSUPA / HSPA / 4G LTE
www.westermo.com
User Guide
6623-2250

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6623-2250
Legal information
The contents of this document are provided “as is”. Except as required by applicable
law, no warranties of any kind, either express or implied, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose, are made
in relation to the accuracy and reliability or contents of this document. Westermo
reserves the right to revise this document or withdraw it at any time without prior
notice.
Under no circumstances shall Westermo be responsible for any loss of data or income
or any special, incidental, and consequential or indirect damages howsoever caused.
More information about Westermo can be found at the following Internet address:
http://www.westermo.com

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Safety
Before using this unit:
Read this manual completely and gather all information on the unit. Make sure
that you understand it fully. Check that your application does not exceed the safe
operating specifications for this unit.
Hazardous voltages may occur within this unit when connected to a power supply.
Prevent access to hazardous voltages by disconnecting the unit from its power
supply.
Prevent damage to internal electronics from electrostatic discharges (ESD) by
discharging your body to a grounding point (e.g. use of wrist strap).
Before installation:
This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or similar, where access is
restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be
possible to disconnect manually from the power supply. Ensure compliance to
national installation regulations.
This unit uses convection cooling. To avoid obstructing the airflow around the unit,
follow the spacing recommendations (see Installation section).
Care recommendations
Follow the care recommendations below to maintain full operation of unit and to fulfil
the warranty obligations.
This unit must not be operated with covers or lids removed.
Do not attempt to disassemble the unit. There are no user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling beyond the specification may cause
damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not
waterproof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical
part may be damaged.
If the unit is not working properly, contact the place of purchase, nearest Westermo
distributor office or Westermo Tech support.
GSM specific safety
Please read and follow the guidelines listed below. The precautions must be observed
during all phases of the operation. Breaking these rules may be dangerous, illegal or affect
performance of the unit and/or invalidate the unit’s approval and/or warranty.
!
!

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General
Remember to follow any special regulations and warnings in force in any area and never
use the unit whenever it’s forbidden to use it. Do not use the unit when it may cause
interference or danger. A wireless device exposed to interference above specified limits
could result in deteriorated performance.
Hospitals or other Medical environment
Do not use the unit in a medical environment such as health care facilities. Follow any
regulations or rules that instruct you to not use the unit.
Pacemakers
The Health Industry Manufacturers Association recommends that a minimum separation
of six (6”) inches be maintained between cellular wireless equipment and a pacemaker to
avoid potential interference with the pacemaker. These recommendations are consistent
with the independent research by and recommendations of-Wireless Technology
Research.
Persons with pacemakers:
… Should ALWAYS keep the the unit and its antenna more than six inches from their
pacemaker when the unit is turned ON.
… If you have any reason to suspect that interference is taking place, turn your wireless
equipment OFF immediately.
Hearing Aids
Some digital wireless equipment may interfere with some hearing aids. In the event of
such interference, you may want to consult your service provider [or call the customer
service line to discuss alternatives.]
Other Medical Devices
If you use any other personal medical device, consult the manufacturer of your device to
determine if they are adequately shielded from external RF energy.-Your physician may be
able to assist you in obtaining this information.
Turn the wireless equipment OFF in health care facilities when any regulations posted
in these areas instruct you to do so. Hospitals or health care facilities may be using
equipment that could be sensitive to external RF energy.
Aircraft
Do not use the unit in an aircraft. The use of a wireless unit in an aircraft may be
dangerous to the operation of the aircraft, disrupt the wireless network, and may be
illegal.
Failure to observe these instructions may lead to suspension or denial of cellular services
to the offender, legal action, or both.
Vehicle
If the unit is incorrectly installed in a vehicular environment, the operation of the unit
could interfere with the vehicle electronics. Faulty installation and/or operation can
constitute a safety hazard.

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For Vehicles equipped with an airbag
An air bag inflates with great force. DO NOT place objects, including either installed or
portable wireless equipment, in the area over the air bag or in the air bag deployment
area. If in-vehicle wireless equipment is improperly installed and the air bag inflates,
serious injury could result.
Blasting areas
Do not use the unit where blasting is in progress or in “blasting areas”. Observe
restrictions and follow any regulation or rules.
Explosive atmospheres
Do not use the unit in any area with a potentially explosive atmosphere. Potentially
explosive areas are often, but not always, clearly marked. They include fuelling areas such
as petrol stations, below decks on boats, fuel or chemical transfer or storage facilities,
and areas where the air contains chemicals or particles, such as grain, dust, or metal
powder.
RF energy
The unit is a low power radio transmitter and receiver. When it is ON, it receives
and also sends out radio frequency (RF) signals. Most modern electronic equipment is
shielded from RF signals. However, certain electronic equipment may not be shielded
against the RF signals from the wireless unit. All radio-transmitting devices send signals,
which may cause interference in different electronic devices. To avoid interference, place
the units antenna a sufficiently long distance from other electronics.
Critical applications
Cellular units operate using radio signals and cellular networks cannot be guaranteed to
connect in all conditions. Therefore you should never rely solely on a wireless device for
essential communications, for example medical emergencies.
Backup copies
Remember to make backup copies of all important data, for example PIN/PUK codes,
contents of SIM card etc.
Antenna care
Use only the supplied or an approved replacement antenna. Unauthorized antennas,
modifications, or attachments could damage the unit and may violate current regulations.
Do not touch the antenna unnecessarily when the unit is in use. Contact with the
antenna affects call quality and may cause the unit to operate at a higher power level
than otherwise needed.
Maintenance
No maintenance is required, as long as the unit is used as intended within the specified
conditions.

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Type Approval/Compliance
EMC
EN 55022, EN 55022 A1,
Information technology equipment.
Radio disturbance characteristics.
Limits and methods of measurement
EN 55024, EN 55024 A1, EN 55024 A2,
Electromagnetic compatibility – Immunity IT equipment
Safety IEC/EN 60950-1, IT equipment
R&TTE
Article 3.1a EN 60950-1 Safety
EN 50385 EMF exposure
Article 3.1b EN 301 489-1 ERM/EMC
EN 301 489-7 ERM/EMC GSM
EN 301 489-24 ERM/EMC 3G
Article 3.2 EN 301 908-1 ERM 3G
EN 301 908-2 ERM 3G
EN 301 511 GSM
Agency approvals and standards compliance

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Declaration of Conformity, MRD 315
Westermo Teleindustri AB
Declaration of conformity
Org.nr/
Postadress/Postal address
Tel.
Telefax
Postgiro
Bankgiro
Corp. identity number
Registered office
S-640 40 Stora Sundby 016-428000 016-428001 52 72 79-4 5671-5550 556361-2604 Eskilstuna
Sweden Int+46 16428000 Int+46 16428001
The manufacturer Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product Model Art no
3G Cellular Modem / Router MRD 315 3623-0050
is in conformity with the following EC directive(s).
No Short name
1999/5/EC Radio equipment and Telecommunications terminal equipment (R&TTE)
2011/65/EU Restriction of the use of certain hazardous substances in electrical and electronic equipment
(RoHS)
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 50385 Product standard to demonstrate the compliance of radio base stations and fixed
terminal stations for wireless telecommunication systems with the basic
restrictions or the reference levels related to human exposure to radio frequency
electromagnetic fields (110 MHz - 40 GHz) - General public
2002
EN 50581 Technical documentation for the assessment of electrical and electronic products
with respect to the restriction of hazardous substances
2012
EN 60950-1 Information technology equipment. Safety. General requirements 2006
+A11:2009
+A1:2010
+A12:2011
+A2:2013
EN 301 489-1
EN 301 489-7
EN 301 489-24
Electromagnetic compatibility and radio spectrum matters (ERM);
Electromagnetic compatibility (EMC) standard for radio equipment and services
Part 1: Common technical requirements
Part 7: Specific conditions for mobile and portable radio and ancillary equipment
of digital cellular radio telecommunications systems (GSM and DCS)
Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for
Mobile and portable (UE) radio and ancillary equipment
2012 (V1.9.2)
2006 (V1.3.1)
2010 (V1.5.1)
EN 301 511 Global system for mobile communications (GSM); Harmonized standard for
mobile stations in the GSM 900 and DCS 1800 bands covering essential
requirements under Article 3(2) of the R&TTE Directive (1999/5/EC)
2003 (V9.0.2)
EN 301 908-1
EN 301 908-2
IMT cellular networks; Harmonized EN covering the essential requirements of
article 3.2 of the R&TTE Directive;
Part 1: Introduction and common requirements
Part 2: CDMA Direct Spread (UTRA FDD) User Equipment (UE)
2013 (V6.2.1)
2014 (V6.2.1)
The last two digits of the year in which the CE marking was affixed: 15
Pierre Öberg
Technical Manager
17
th
Mars 2015

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6623-2250
Declaration of Conformity, MRD 355
Westermo Teleindustri AB
Declaration of conformity
Org.nr/
Postadress/Postal address
Tel.
Telefax
Postgiro
Bankgiro
Corp. identity number
Registered office
S-640 40 Stora Sundby 016-428000 016-428001 52 72 79-4 5671-5550 556361-2604 Eskilstuna
Sweden Int+46 16428000 Int+46 16428001
The manufacturer Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product Model Art no
3G Cellular Modem / Router MRD-355 3623-0250
is in conformity with the following EC directive(s).
No Short name
1999/5/EC Radio equipment and Telecommunications terminal equipment (R&TTE)
2011/65/EU Restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS)
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 50385
Product standard to demonstrate the compliance of radio base stations and fixed
terminal stations for wireless telecommunication systems with the basic restrictions
or the reference levels related to human exposure to radio frequency
electromagnetic fields (110 MHz - 40 GHz) - General public
2002
EN 50581
Technical documentation for the assessment of electrical and electronic products
with respect to the restriction of hazardous substances
2012
EN 60950-1
Information technology equipment. Safety. General requirements 2006
+A11:2009
+A1:2010
+A12:2011
+A2:2013
EN 301 489-1
EN 301 489-7
EN 301 489-24
Electromagnetic compatibility and radio spectrum matters (ERM); Electromagnetic
compatibility (EMC) standard for radio equipment and services
Part 1: Common technical requirements
Part 7: Specific conditions for mobile and portable radio and ancillary equipment
of digital cellular radio telecommunications systems (GSM and DCS)
Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for
Mobile and portable (UE) radio and ancillary equipment
2012 (V1.9.2)
2006 (V1.3.1)
2010 (V1.5.1)
EN 301 511
Global system for mobile communications (GSM); Harmonized standard for
mobile stations in the GSM 900 and DCS 1800 bands covering essential
requirements under Article 3(2) of the R&TTE Directive (1999/5/EC)
2003 (V9.0.2)
EN 301 908-1
EN 301 908-2
IMT cellular networks; Harmonized EN covering the essential requirements of
article 3.2 of the R&TTE Directive;
Part 1: Introduction and common requirements
Part 2: CDMA Direct Spread (UTRA FDD) User Equipment (UE)
2013 (V6.2.1)
2014 (V6.2.1)
The last two digits of the year in which the CE marking was affixed: 15
Pierre Öberg
Technical Manager
1
st
April 2015

9
6623-2250
Declaration of Conformity, MRD 455
Westermo Teleindustri AB
Declaration of conformity
Org.nr/
Postadress/Postal address
Tel.
Telefax
Postgiro
Bankgiro
Corp. identity number
Registered office
S-640 40 Stora Sundby 016-428000 016-428001 52 72 79-4 5671-5550 556361-2604 Eskilstuna
Sweden Int+46 16428000 Int+46 16428001
The manufacturer Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product Model Art no
4G Cellular Modem / Router MRD-455 3623-0401
is in conformity with the following EC directive(s).
No Short name
1999/5/EC Radio equipment and Telecommunications terminal equipment (R&TTE)
2011/65/EU Restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS)
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 50385
Product standard to demonstrate the compliance of radio base stations and fixed
terminal stations for wireless telecommunication systems with the basic restrictions
or the reference levels related to human exposure to radio frequency
electromagnetic fields (110 MHz - 40 GHz) - General public
2002
EN 50581
Technical documentation for the assessment of electrical and electronic products
with respect to the restriction of hazardous substances
2012
EN 60950-1
Information technology equipment. Safety. General requirements 2006
+A11:2009
+A1:2010
+A12:2011
+A2:2013
EN 301 489-1
EN 301 489-7
EN 301 489-24
Electromagnetic compatibility and radio spectrum matters (ERM); Electromagnetic
compatibility (EMC) standard for radio equipment and services
Part 1: Common technical requirements
Part 7: Specific conditions for mobile and portable radio and ancillary equipment
of digital cellular radio telecommunications systems (GSM and DCS)
Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for
Mobile and portable (UE) radio and ancillary equipment
2012 (V1.9.2)
2006 (V1.3.1)
2010 (V1.5.1)
EN 301 511
Global system for mobile communications (GSM); Harmonized standard for
mobile stations in the GSM 900 and DCS 1800 bands covering essential
requirements under Article 3(2) of the R&TTE Directive (1999/5/EC)
2003 (V9.0.2)
EN 301 908-1
EN 301 908-2
IMT cellular networks; Harmonized EN covering the essential requirements of
article 3.2 of the R&TTE Directive;
Part 1: Introduction and common requirements
Part 2: CDMA Direct Spread (UTRA FDD) User Equipment (UE)
2013 (V6.2.1)
2014 (V6.2.1)
The last two digits of the year in which the CE marking was affixed: 15
Pierre Öberg
Technical Manager
1
st
April 2015

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Type tests and environmental conditions
Phenomena Test Description Test levels
ESD EN 61000-4-2 Enclosure contact ± 6 kV (crit A)*
Enclosure air ± 8 kV (crit A)*
RF field AM modulated IEC 61000-4-3 Enclosure 10 V/m (crit A)*
(80 – 2700 MHz)
Fast transient EN 61000-4-4 Signal ports ± 1 kV (crit A)*
Power ports ± 2 kV (crit A)*
Surge EN 61000-4-5 Ethernet ports ± 1 kV (direct) (crit B)*
Power ports ± 0.5 kV (line to earth) (crit B)*
± 0.5 kV (line to line) (crit B)*
RF conducted EN 61000-4-6 All ports 10 V/m, (crit A) *
(0.15 – 80 MHz)
Radiated emission EN 55022 Enclosure Class B
Conducted emission EN 55022 DC power ports Class B
Ethernet ports Class B
Temperature Operating –40 to +70ºC
Storage & Transport –40 to +85ºC
Humidity Operating 0 to 90% relative humidity non
condensing.
Storage & Transport 0 to 90% relative humidity non
condensing.
Altitude Operating 2000 m/70 kPa
MTBF MIL-217-F MRD-315 825 759 hours
MRD-355 689 933 hours
MRD-455 689 933 hours
Service life Operating 10 year
Dimension W x H x D 53 x 103 x 134 mm
Weight 0.40 kg
Degree of protection IEC 529 Enclosure IP 40
Cooling Convection
Mounting Horizontal on 35 mm DIN-rail
*crit A = no effect, crit B = restart without user intervention

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Description MRD-315
Remote access removes boundaries,
eliminates the need for time consuming site
visits and provides a network infrastructure
suitable for today’s “always-on” society. The
MRD-315 industrial mobile broadband
router uses the Internet to cost effectively
inter-connect systems, allowing HMI, PLCs,
sensors etc to communicate with each other.
A compact case design with DIN-rail
mounting clips and the wide power input
range between 10 to 60 VDC make the unit
well suited for industrial applications. Easy
integration with other devices is achieved
using the built-in two port Ethernet switch and the RS-232 D-sub.
The stability of mobile connections can be affected by various different parameters and in order to
ensure constant connectivity the MRD-series features a connection manager.
The MRD-315 offers network protection from malicious eavesdroppers via encrypted
communication tunnels (VPN), and features a simple, yet powerful, packet inspection firewall.
For solar powered applications energy efficiency is vital and the MRD-315 has a special low-power
mode to only be fully powered when needed. The built-in serial port offers a simple modem
replacement solution with the benefit of not having to reprogram or change legacy components
during an upgrade.
Interface specifications MRD-315
Power
Rated voltage 12 – 48 VDC
Operating voltage 10 – 60 VDC
Start-up current (max) 400 mA
Rated frequency DC
Consumption guidance* Voltage Mode Consumption
24 VDC No network registration 51 mA 1.224 W
24 VDC GPRS Idle 59 mA 1.416 W
24 VDC GPRS Average send/receive 80 mA 1.92 W
24 VDC GPRS Max send/receive 110 mA 2.64 W
24 VDC UMTS Idle 59 mA 1.416 W
24 VDC UMTS Average send/receive 84 mA 2.016 W
24 VDC UMTS Max send/receive 88 mA 2.12 W
* For example purpose only. Hard to predict exact values since there are a lot of factors that affect the power
consumption, such as signal strength. Example measurement was carried out in-doors in a 25ºC room with
"normal" signal strength.

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Description MRD-355
Remote access removes boundaries, eliminates the need
for time consuming site visits and provide a network
infrastructure suitable for today’s “always-on” society.
The MRD-355 industrial mobile broadband GPRS/EDGE/3G
router uses the Internet to cost effectively inter-connect
systems, allowing HMI, PLCs, sensors etc to communicate
with each other.
A compact design bundled with all interfaces and LEDs in
the front make the unit extremely well suited for industrial
applications. With isolation between the PSU and the
Ethernet and serial ports the MRD-355 protects against
issues caused by ground loops.
The dual SIM support in the device ensures that site
connectivity is not dependent on a single carrier, should
something happen the unit just switches to the other SIM.
Devices connected to the Internet require countermeasures
towards cyber threats. The MRD-355 offers protection of transmissions from malicious
eavesdroppers via encrypted communication tunnels (VPN), and features a simple, yet powerful,
packet inspection firewall.
The MRD-355 with its built-in serial port offers a simple modem replacement solution with the
benefit of not having to reprogram or change any other component.
Interface specifications MRD-355
Power
Rated voltage 12 – 48 VDC
Operating voltage 10 – 60 VDC
Start-up current (max) 400 mA
Rated frequency DC
Consumption guidance* Voltage Mode Consumption
24 VDC No network registration 78 mA 1.8 W
24 VDC GPRS Idle 86 mA 2.064 W
24 VDC GPRS Average send/receive 98 mA 2.352 W
24 VDC GPRS Max send/receive 140 mA 3.36 W
24 VDC UMTS Idle 86 mA 2.064 W
24 VDC UMTS Avarage send/receive 98 mA 2.352 W
24 VDC UMTS Max send/receive 110 mA 2.64 W
* For example purpose only. Hard to predict exact values since there are a lot of factors that affect the power
consumption, such as signal strength. Example measurement was carried out in-doors in a 25ºC room with
"normal" signal strength.

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Description MRD-455
Remote access removes boundaries, eliminates the need
for time consuming site visits and provide a network
infrastructure suitable for today’s “always-on” society.
The MRD-455 industrial mobile broadband GPRS/
EDGE/3G/4G LTE router uses the Internet to cost effectively
inter-connect systems, allowing HMI, PLCs, sensors etc to
communicate with each other.
A compact design bundled with all interfaces and LEDs in
the front make the unit extremely well suited for industrial
applications. With isolation between the PSU and the Ethernet
and serial ports the MRD-455 protects against issues caused
by ground loops.
The dual SIM support in the device ensures that site
connectivity is not dependent on a single carrier, should
something happen the unit just switches to the other SIM.
Devices connected to the Internet require countermeasures
towards cyber threats. The MRD-455 offers protection of transmissions from malicious
eavesdroppers via encrypted communication tunnels (VPN), and features a simple, yet powerful,
packet inspection firewall.
The MRD-455 with its built-in serial port offers a simple modem replacement solution with the
benefit of not having to reprogram or change any other component.
Interface specifications MRD-455
Power
Rated voltage 12 – 48 VDC
Operating voltage 10 – 60 VDC
Start-up current (max) -400 mA
Rated frequency DC
Consumption guidance* Voltage Mode Consumption
24 VDC No network registration 78 mA 1.8 W
24 VDC GPRS Idle 86 mA 2.064 W
24 VDC GPRS Average send/receive 98 mA 2.352 W
24 VDC GPRSS Max send/receive 140 mA 3.36 W
24 VDC UMTS/LTE Idle 86 mA 2.064 W
24 VDC UMTS/LTE Avarage send/receive 98 mA 2.352 W
24 VDC UMTS/LTE Max send/receive 110 mA 2.64 W
* For example purpose only. Hard to predict exact values since there are a lot of factors that affect the power
consumption, such as signal strength. Example measurement was carried out in-doors in a 25ºC room with
"normal" signal strength.

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General interface specifications for all MRDs
RS-232
Electrical specification EIA RS-232
Data rate 300 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits
Protocol Transparent, optimised by packing algorithm
Circuit type SELV
Transmission range 15 m/49 ft
Connection 9 pin D-sub female
Shielded cable Not required
Conductive housing Ye s
Number of ports 1
Ethernet TX
Electrical specification IEEE std 802.3. 2005 Edition
Data rate 10 Mbit/s, 100 Mbit/s, manual or auto
Duplex Full or half, manual or auto
Circuit type SELV
Transmission range 100 m/328 ft
Isolation to All other
Connection RJ-45 auto MDI/MDIX
Shielded cable Not required, except when installed in Railway applications as signalling
and telecommunications apparatus and located close to rails.*
Conductive housing Ye s
Number of ports 2
* To minimise the risk of interference, a shielded cable is recommended when the cable is located inside 3 m
boundary to the rails and connected to this port. The cable shield should be properly connected (360º) to an
earthing point within 1 m from this port. This earthing point should have a low impedance connection to the
conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in. This conductive enclosure
should be connected to the earthing system of an installation and may be directly connected to the protective
earth.

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Antenna
Mobile/
Cellular Technology
Max Connectivity Speed Frequency (MHz)
Downlink Uplink Note
GSM 14.4 kbit/s 14.4 kbit/s – 900/1800
GPRS 85.6 kbit/s 85.6 kbit/s Class 12
EDGE 236.8 kbit/s 236.8 kbit/s Class 12
3G UMTS 384 kbit/s 384 kbit/s – 850/900/2100
HSDPA 42 Mbit/s – Cat 14
HSUPA – 5.7 Mbit/s Cat 6
4G LTE
- only MRD-455
100 Mbit/s 50 Mbit/s - 800(B20)/1800(B3)/2600(B7)
Antennas Transmit
(TX)
Receive (RX) Required Label Connector
Main Antenna
Optional Antenna*
GPS Antenna**
YES YES YES MAIN SMA
NO YES NO RxDIV SMA
– – NO GPS SMA
* Antenna connector labeled RxDIV is optional and used for receive diversity.
** Passive GPS antennas only.
SIM
Electrical specification 3 volts SIM supported
Number of slots MRD-315: 1
MRD-355: 2
MRD-455: 2

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SIM card drawer
eject button
Connections MRD-315
Serial Port (DCE Female)
Position Name Direction Description
5
1
9
6
1 DCD Out Data Carrier Detect
2 RxD Out Receive Data
3 TxD In Transmit Data
4 DTR In Data Terminal Ready
5 SG – Signal Ground
6 DSR Out Data Set Ready
7 RTS IN Request to Send
8 CTS Out Clear to Send
9 RI Out Ring Indicator
Led indicators
Antenna
Protective
earth
SIM card drawer Power
connector
Ethernet TX Connections
(RJ-45 connector) LAN1-2
Position Direction Description
1 In/Out TD+
2 In/Out TD–
3 In/Out RD+
4 – Not Connected
5 – Not Connected
6 In/Out RD–
7 – Not Connected
8 – Not Connected
Factory default
reset switch

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SIM card 2 drawer
eject button
Connections MRD-355 and MRD-455
Serial Port (DCE Female)
Position Name Direction Description
5
1
9
6
1 DCD Out Data Carrier Detect
2 RxD Out Receive Data
3 TxD In Transmit Data
4 DTR In Data Terminal Ready
5 SG – Signal Ground
6 DSR Out Data Set Ready
7 RTS IN Request to Send
8 CTS Out Clear to Send
9 RI Out Ring Indicator
Led indicators
Antenna
Protective earth
SIM card drawers
Factory default
reset switch
Power connector
SIM card 1 drawer
eject button
Ethernet TX Connections
(RJ-45 connector) LAN1-2
Position Direction Description
1 In/Out TD+
2 In/Out TD–
3 In/Out RD+
4 – Not Connected
5 – Not Connected
6 In/Out RD–
7 – Not Connected
8 – Not Connected
Antenna
connection

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LED Indicators
LED Status Description
STS
Status
RED No wireless network has been detected
RED FLASH A wireless network has been detected
GREEN Power up self test OK/no issues
NET
NET 1
NET 2
Network indicator
OFF Not ready
RED RF circuitry initialising or network
registration fault
GREEN/RED Network connection fault
GREEN FLASH Searching for network
GREEN Locked to network
GREEN 1 BLINK
Signal strength indication
1 Very poor
3 Normal
6 Very good
GREEN 2 BLINKS
GREEN 3 BLINKS
GREEN 4 BLINKS
GREEN 5 BLINKS
GREEN 6 BLINKS
Status Indicator
The status indicator reports the health of the unit. In normal operation, the indicator will
be green, if a fault is detected either at boot-up or during normal operation the indicator
will light red. When the unit is first switched on or is reset, the indicator will first light
red, then flash red in sequence with the Network Indicator, this is normal behavior during
boot-up and does not indicate a fault. The indicator will light red or green a short time
after power is applied. If the indicator does not light when power is applied check the
power supply voltage and connections.
Network Indicator
There are network indicators one for each SIM, i.e. MRD-315 (NET), MRD-355/455
(NET1, NET2) The indicator reports the status of the connection to the network. When
powered up the indicator will be off, the indicator will then flash green whilst the unit
searches for a network, once connected to the network the indicator will light green.
Once a network connection has been established the Network Indicator reports the
level of the received RF signal as well as any network connection faults. The signal
strength is indicated by the number of green flashes of the indicator within an indicator
period. Each indicator green flash will be followed by a short off time, an extended off
time indicates the end of the indicator period. So an indicator period starts with a green
flash followed by up to 5 additional flashes, then an extended off time, the cycle will then
repeat. The maximum number of flashes in an indicator period is 6. The indicator may
be red during the extended off time following the green flashes, this indicates a network
connection fault. The indicator will flash red if a SIM card is not present and will be solid
red if the RF circuitry is restarting, network registration has failed or the RF signal level is

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too low for a connection.
When the unit is first switched on, or is reset the indicator will first light red, then flash
red in sequence with the Status Indicator, this is normal behavior during boot-up and
does not indicate a fault.
Factory Default Reset Switch
The reset switch is used to restore the configuration of the MRD to factory default
settings. The switch is accessed through a small hole on the rear of the unit adjacent to
the power connector.
To reset the configuration:
• Power down the unit.
• Use a suitable tool and depress the reset switch.
• Power up the unit ensuring the switch remains depressed for approximately 10
seconds after power is applied. The STS LED and NET LED will flash twice to indicate
a reset.
• The router will now re-boot as normal with the factory default settings.
Note: Using the Factory Default Reset Switch will erase all existing configuration settings
and restore the factory default settings. This includes the network connection
profile settings APN, user name and password.
Factory default reset switch

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Protocols and Functionality MRD-315/355/455
Ethernet Technologies IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseTX
Cellular Technologies Circuit Switched Data mode (CSD)
GSM
GPRS Multi-slot class 12, mobile station class B, PBCCH support,
coding schemes CS 1-4
EDGE Multi-slot class 12 (max 236.8 kbit/s), mobile station class B,
modulation and coding scheme MCS 1-9
3G (WCDMA/UMTSt) 384 kbit/s downlink/uplink
HSUPA up to 5.7 Mbit/s uplink
MRD-315/MRD-355
HSDPA up to 21.0 Mbit/s downlink
MRD-455
HSDPA up to 42 Mbit/s downlink
4G LTE up to 100 Mbit/s downlink
4G LTE up to 50 Mbit/s uplink
Serial Port Technologies RS-232
Serial Over IP (Serial Extender and Virtual Serial Port)
Router emulation
AT command interpreter
MODBUS
DNP3
Layer-2 QoS IEEE 802.1p Class of Service
IP Routing,
Firewall,
VPN
and Cyber Security
Static IP routing
Dynamic IP routing
• RIPv1/v2
VRRP
GRE
Stateful inspection Firewall/ACL, NAT, Port Forwarding
25 x IPsec VPN, PSK & X.509
1 x L2TP client
1 x PPTP client
1 x OpenVPN/SSL VPN client
RADIUS
PPP Dial in/Dial out
Manageability Management tools
• Web interface (HTTP and HTTPS)
• Command Line Interface (CLI) via SSHv2 and TELNET
• SNMPv1/v2c/v3
• SMS Control
Flexible alarm/event handling system
Syslog (log files and remote syslog server)
SNTP (NTP client)
DHCP client
DHCP server
DDNS (Dynamic DNS update client)
For more information, please refer to the Reference Guide on the product website.