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Summary of Contents for Simrad MX521
- Page 1 Manual Simrad MX521/MX521A/MX521B GPS/DGPS Sensor English www.simrad-yachting.com A brand by Navico - Leader in Marine Electronics...
- Page 3 As we are continuously improving our products we retain the right to make changes to the product and the documentation at any time. Updated manuals are available from our website www.navico.com/commercial or www.simrad-yachting.com, and are free to download. © Copyright 2016 by Navico Holding AS.
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Page 4: Important Notice
IMPORTANT NOTICE! THE MX521 GPS/DGPS SENSOR IS AN AID TO NAVIGATION ONLY. Under no circumstances should it be used in lieu of authorized government charts. Its accuracy can be affected by many factors such as equipment defects, environmental conditions, or improper operation. - Page 5 Copyright Copyright © 2016 Navico Holding AS. Warranty The warranty card is supplied as a separate document. In case of any queries, refer to the our website: www.navico.com/commercial or www.simrad-yachting.com Simrad MX521/MX521A/MX521B | 3...
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Page 6: Table Of Contents
(RAIM) ............9 GLONASS Overview (MX521B only) ..9 Space Segment ........9 GPS and GLONASS ......10 3 Installation ..........11 MX521 Antenna Mounting Guidelines ..... 11 MX521 Connector ........12 Antenna Mounting ........13 Bracket Mount ........13 Surface Mount ........13 Antenna Cable Selection ...... - Page 7 4 Specifications ........... 25 GPS Receiver ........25 Beacon Receiver (MX521A DGPS model only) ..........25 MX521B D/GNSS Receiver ....27 5 Data Output ..........31 NMEA 0183 Data Output Sentences ..31 List of abbreviations ......37 Simrad MX521/MX521A/MX521B | 5...
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Page 8: General
2-meter DGPS accuracy in areas with good beacon differential coverage and autonomous GPS accuracy better than 5 meters. When connected to an MX-CDU (i.e. MX61x or MX51x), the MX521 can be controlled to function in several modes, namely; GPS only •... -
Page 9: Supplied Equipment
Supplied Equipment The following items are supplied with the MX521 Kit: Description Part Number MX521B GPS smart antenna with GLONASS 000-11641-001 MX521B DGPS smart antenna with GLONASS 000-11640-001 The antenna cable assembly is not included and must be ordered separately. Please specify the cable length required. -
Page 10: Operation
(just like the Coast Guard stations) using the same GPS frequency of 1575.00 MHz. Refer to the MX CDU Operator Manual for more details. Turning this feature on in the MX CDU will initiate the MX521 to listen for and track any Operation | 8... -
Page 11: Receiver Autonomous Integrity Monitoring (Raim)
SBAS satellites that are in view. Receiver Autonomous Integrity Monitoring (RAIM) RAIM is a special software algorithm in the MX521 program which gives the operator timely warnings when the GPS system accuracy is questionable. This feature requires a minimum of five GPS satellites to operate properly. -
Page 12: Gps And Glonass
a modulation technique known as FDMA (Frequency Deviation Multiple Access). They have the same polarization as the GPS signals and have comparable signal strength. The signal of the GLONASS satellite includes the Satellite ID, Positioning, velocity, acceleration, satellite health, time and time offset and almanac of all GLONASS satellites. -
Page 13: Installation
Use a standard 1”-14 TPI bracket for mounting. Install the MX521 antenna where it has a clear view of • the sky around it. -
Page 14: Mx521 Connector
MAST VHF OR MF ANT. MX ANT. 10 m MOUNT THE MX521 10 m (min.) FORWARD OF MAIN MAST MX521 Connector The 10-pin male connector located at the underside of the antenna unit provides the means to connect to external power and the data interface. Please refer to the chart below for the pin numbers, wire colors codes and signal assignments. -
Page 15: Antenna Mounting
The MX521 can also be surface-mounted. Make sure there is at least 5-inch clearance underneath the mounting surface to accommodate the lower section of the MX521 housing, connector and cable. Refer to the figure below for surface mounting considerations. Cut a 5 Installation | 13... - Page 16 Mounting surface Recommended clearance under 2 mm mounting screws (4 places) the antenna " 5 1/4 2 mm screw (4 places) MX521 Surface Mount 14 | Installation...
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Page 17: Antenna Cable Selection
Antenna Cable Selection The antenna cable assembly for the MX521 antenna is not included in the kit and must be ordered separately. Several cable lengths are available in stock. To assist you in ordering the correct cable length, please refer to the antenna cable list below for cable description and part number. -
Page 18: Power Requirement
External power supplied to the MX521 must be within 10.5-32 VDC for best operation. To protect the circuitry in the MX521, the voltage level must be within these limits. Negative grounding is required. The MX521 draws less than 300 mA. at 12 VDC. An in-line fuse or circuit breaker rated at 2 amp. -
Page 19: Mx521 Connector Configuration
MX521 Connector Configuration Refer to the diagram below for the POWER-DATA connector located at the underside of the MX521A: Pin# Wire Signal Ext. RTCM IN- P rpl/ G ry Ext. RTCM IN+ Purple White Beacon Status Out +* Yellow Beacon Status Out -*... -
Page 20: Data Interface To Mx420/2 Or Mk12 Cdu
NMEA2 I/O (14) Blu Out (A) (15) Blu/wht Out (B) (17) Gry NMEA2 Tx (RS-232) (18) Blk/Wht Ext. Alarm (3) Blk (2) Red Terminal strip 12~32 VDC (User supplied) Supply MX521 Interface to MX420/2 or MK12 CDUs 18 | Installation... -
Page 21: Data Interface To Mx420/8 Or Mx420/Ais Cdu
(18) Blk/Wht Ext. Alarm (3) Blk (2) Red Terminal Strip (User Supplied) 12~32 VDC Supply (4) Brn White* (5) Brn/Wht Yellow* Purple Purple/Gray Note: * Not available with MX521G models (Optional) MX521 Interface to MX420/8 or MX420/AIS CDUs Installation | 19... -
Page 22: Data Interface To Pc Or Other Navigation Systems
Blu (MPM In -) Grn (GPS Out + ) Org (GPS Red (+12 VDC) BL k (GND) 1 2 3 4 5 6 7 8 9 9dB PC Connector 12~32 VDC Supply MX521 Interface to Other Navigation Systems 20 | Installation... -
Page 23: Mx521 Programming Cable
The figure below shows the programming cable diagram and equipment setup. Please note that external 12 volt DC is required to power up the MX521. Connect the red wire to +12 VDC and Black wire to negative GND. The RS422-RS232 converter may be powered from the PC serial port or from an external 12 volt power supply. -
Page 24: Data Interface To Mx5Xx Cdu
Data Interface to MX5xx CDU Use the diagram below to interface the MX521 to an MX500, MX510 or MX512 CDU. Antenna cable assembly with two 10-Pin connectors are available in 3, 20 and 40 meter lengths. MX5xx CDU MX521 P/N 3508 102 70150 10-PIN CABLE ASSY. -
Page 25: Data Interface To Mx61X Junction Box
Data Interface to MX61x Junction Box Use the diagram below to interface the MX521 to GN70/ MX61x CDU via MX61x JB. GN70/MX61x Option MX521 MX521A MX521B MXB5 ANT. 12/24V DC Coax Cable MX525 MX525A MX61xJB 12/24V DC Ports 3&4 Where:... - Page 26 Normal operation RX data, flashing approx. 1 Hz flashing. when receiving data from antenna. Supply before fuse steady green. MX521 to MX61xJB wiring diagram 24 | Installation...
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Page 27: Specifications
Datum: ..............WGS84 NMEA messages: GGA, GRS, GSA, GSV, GST, RMC, VTG, ZDA & PMVXG,GBS (MX Marine proprietary) Beacon Receiver (MX521 DGPS model only) Frequency: ....283.5 to 325.0 kHz. 2-channel Auto or Manual selection (500 Hz steps) Sensitivity: ......2.5 uV/m for 6dB SNR @ 200 bps Operating Modes: .... - Page 28 Height ............ 102 mm (4.0 in.) Diameter ..........182 mm (7 1/8 in) Weighs: (MX521 DGPS) ..820 grams (1.8 lbs.) (without cable) (MX521G ) ....600 grams (1.3 lbs.) (without cable) Mount: ..1”-14 TPI pole mount. Surface mounting 5 1/4 “ hole Electrical Operating voltage range: .........
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Page 29: Mx521B D/Gnss Receiver
MX521B D/GNSS Receiver Key features: • IMO type approved • Flexibility for easy integration into NMEA 0183 interfaces • More satellite tracking for better geometry • Maintain position lock when more of the sky is blocked • COAST technology maintains differentially-corrected positioning for 40 minutes or more after loss of differential signal GNSS Sensor Specifications... - Page 30 Beacon Sensor Specifications Channels: ........2-channel, parallel tracking Frequency Range: ........283.5 to 325 kHz Operating Modes: ....Manual, automatic and database Compliance: .......IEC 61108-4 beacon standard Communications Baud Rates: ............4800 - 115200 Correction I/O Protocol: ......RTCM v2.3 (DGPS) Data I/O Protocol: ..........NMEA 0183 Power Input Voltage: ..........
- Page 31 The ISO 694 defines “vicinity” relative to the compass as within 5 m (16.4 ft) separation 6 NMEA 0183 only Simrad reserves the right to make changes in its products and specifications without notice. Specifications | 29...
- Page 32 Blank page 30 | Specifications...
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Page 33: Data Output
5 Data Output The MX521 data output conforms to the NMEA 0183 V3.0 at 4800 baud. Below is a list of the NMEA sentences output: GGA, GSA, GSV, GST, RMC, VTG and PMVXG,GBS (an MX proprietary sentence used for RAIM) - Page 34 (2) GRS - GNSS Range Residual This message is used to support RAIM. $GPGRS,hhmmss,x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x*hh<CR><LF> Notes: 1 ---- UTC time of GGA or GNS fix associated with this sentence 2 ---- Mode 0 = residuals were used to calculate the position given in the matching GGA or GNS.
- Page 35 (4) GSV - GPS Satellite in View Number of satellites (SV) in view, PRN numbers, elevation, azimuth and SNR values. Four satellites maximum per transmission, additional satellite data sent in second or third message. Total number of messages being transmitted and the number of the message transmitted are indicated in the first two fields.
- Page 36 5,6 -- Longitude, E/W 7 ---- Speed over ground, knots 8 ---- Course Over Ground, True 9 ---- Date: dd/mm/yy 10,11 - Magnetic variation, degrees E/W. Easterly variation (E) subtracts from True course, Westerly variation (W) adds to True course. (6) GST - GNSS Pseudorange Error Statistics This message is used to support Receiver Autonomous Integrity Monitoring (RAIM).
- Page 37 7 ---- Standard deviation of longitude error (meters) 8 ---- Standard deviation of altitude error (meters) (7) VTG - Course Over Ground and Ground Speed The actual course and speed relative to the ground. $GPVTG,x.x,T,x.x,M,x.x,N,x.x,K,a*hh<CR><LF> 1 2 3 4 5 6 7 Notes: 1,2 ---- Course over ground, degrees True 2,3 ---- Course over ground, degrees Magnetic 5,6 ---- Speed over ground, knots...
- Page 38 (9) GBS - GNSS Satellite Fault Detection (Modified MX version) This message is used to support Receiver Autonomous Integrity Monitoring (RAIM) feature in the MX420 CDU. A special character flag was added for proper RAIM status determination. $PMVXG,GBS,hhmmss.ss,x.x,x.x,x.x,xx,x.x,x.x,x.x,x*hh<CR><LF> 3 4 5 6 7 Notes: 1 ----- UTC time of the GGA or GNS fix associated with this sentence.
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Page 39: List Of Abbreviations
List of abbreviations Control Display Unit DGPS Differential Global Positioning System FDMA Frequency Deviation Multiple Access GLONASS Global Orbiting Navigation Satellite System GNSS Global Navigation Satellite System Global Positioning System HDOP Horizontal Dilution Of Precision International Maritime Organization NMEA National Marine Electronic Association PDOP Positional Dilution Of Precision RAIM...
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