Manual Simrad MX525A DGPS Receiver English www.simrad-yachting.
Manual Simrad MX525A DGPS Receiver English Document no: 727007 Revision: A Date: March 2008 The original language for this document is English. In the event of any discrepancy between translated versions and the English version of this document, the English document will be the official version. To the best of our knowledge, the content in this publication was correct at the time of printing.
IMPORTANT NOTICE! THE MX525A DGPS RECEIVER 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. The user is responsible for safe navigation of the vessel. This includes consulting authorized government charts and exercising common prudence and navigational judgement at all times.
Contents 1 General........................................................ 5 Supplied Equipment.......................................6 2 Operation.................................................... 7 General........................................................7 Satellite Bases Augmentation System (SBAS)....7 Receiver Autonomous Integrity Monitoring (RAIM).........................................................8 3 Installation.................................................. 9 MX525A Mounting.........
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1 General This manual describes the operation and installation of the MX525A DGPS sensor (with the MGL-4 antenna) and older version MX525 black box DGPS sensor (with the MGL-3 antenna). Their wiring hook-up is identical and the antennas are interchangeable. The MX525A is a blackbox GPS and Differential Beacon receiver combination. It has a 10-pin connector for power and data connection and a TNC connector to connect to an active GPS and Beacon combo antenna.
Supplied Equipment The following items are supplied with the MX525A DGPS Sensor Kit (p/n 9525 200 81000): Description Part Number MX525A DGPS Sensor with mounting kit 9525 200 81010 MGL-4 Combo Antenna 721757 Power/Data Cable assembly, 3 m. 3508 102 70150 Installation Manual 727007 The antenna coax cable for the MGL-4 antenna is not included in the kit and must be ordered separately.
2 Operation General The MX525A sensor is an integrated GPS and beacon receiver unit that is fully automatic and requires minimal user intervention. It will automatically search for available satellites as soon as power is applied. The internal 2-channel beacon receiver continuously monitors all beacon signals available in a particular location. The first channel tracks the primary station while the second channel searches for other nearby beacons.
Receiver Autonomous Integrity Monitoring (RAIM) RAIM is a special software algorithm in the MX525A program which provides another layer of safety because it gives the operator an alarm indication if the GPS system accuracy exceeds a predefined tolerance. This feature requires at least five or more GPS satellites to operate properly. If the position solution falls outside this tolerance (usually 100 meter) a “RAIM Unsafe” alarm will be activated in the MX420 CDU.
3 Installation MX525A Mounting The MX525A console is not weather-resistant and must be located inside the equipment room or pilot house where it is dry and protected from the elements. Provide ample clearance around it for good air circulation. Use the supplied mounting bracket kit to mount it on a vertical wall. Locate the MX525A within 3 meters from the MX CDU junction box.
between them on pins 1 through 8. The RF (TNC-F) connector is used to connect the MX525A to a combined DGPS antenna (MGL-3).
MGL-4 Antenna Mounting Guidelines •• Install the MGL-4 antenna where it has clear view of the sky around it. •• Locate the antenna for easy access and maintenance. •• Stay away from high-power energy sources such as radar, SSB, INMARSAT and other transmitting radio antennas by 5 meters or more. •• Locate the antenna at least 10 feet (about 3 meters) away from and out of the transmitting beam of radar and other high-power transmitters.
Antenna Mounting Bracket Mount The MGL-4 antenna mounting thread is an industry standard fitting for VHF antenna mounting (1.0 inch, 14 TPI). This enables the antenna to be mounted on a wide range of mounting brackets, including the swivel joints, commonly used for angled surface. Refer to the figure below for bracket mounting illustration. Hand-tighten the antenna onto the bracket until snug. Do not overtighten.
Antenna Cable Selection The table below gives recommendation on coaxial cables that can be used for the MGL-4 GPS antenna. It is important to keep the attenuation in the cable as low as possible. The maximum allowable cable and connector loss is 15 dB. Coax cable type Max cable length (m) Diameter (mm) Weight (kg/100m) RG58 15 5.0 2.6 SAT45 45 5.5 2.6 RG223 25 5.4 5.5 RG214 45 10.8 18.5 LMR400 80 10.3 13.
The red wire connects to the (+) DC power, while the black wire is the negative return. Although the MX525A has a reverse polarity protection, it is prudent to make sure that proper polarity is observed before making the connection. Reverse polarity connection may damage the unit. Power/Data Cable Assembly Below is a diagram showing the pins and wire colorcoding of the Power/Data cable assembly. 10-Pin Female Connector 3.
MX525A Connector Configuration Refer to the diagram below for the POWER-DATA connector located at the rear panel of the MX525A: POWER DATA RF ? ?? ? ? ? ? ? ? ? ? TNC Connector Pin# 10 9 8 7 6 5 4 3 2 1 Wire Prpl/Gry Purple White Yellow Green Orange Brown Blue Red Black Signal Ext. RTCM IN Ext. RTCM IN+ Beacon status Out + Beacon status Out GPS Out + GPS Out MPM In+ MPM In +12-32VDC Negative GND MX525A POWER-DATA Connector Where: Pins 1 & 2: Negative GND and +12 VDC power input.
Data Interface to MX420/2 or MK12 CDU Use the diagram below to interface the MX525A to an MX420/2 or MK12 CDU.
Data Interface to MX420/8 or MX420/ AIS CDU Use the diagram below to interface the MX525A to an MX420/8 or MX420/AIS CDU. The external RTCM connection is optional.
Data Interface to MX5xx CDU The standard power/data cable (P/N 3508 102 70150) for the MX525A and MX5xx CDU is pre-made with two molded 10-Pin male connectors for an easy plug-andplay connection to the back of the MX5xx CDU. If there is a need to extend (or cut) the standard cable, please refer to the diagram below for the wire splice. MX525A MX 5xx CDU P/N 3508 102 70150 3 MTR. CABLE ASSY.
Data Interface to PC or other navigation systems The diagram below shows the power and data output connections to the serial port of a PC or other navigation systems using a dB9 connector and a terminal strip (user MGL-4 Combo Antenna Coax Cable MX525A Console Brn (MPM In +) Blu (MPM In -) Grn (GPS Out +) Org (GPS Out -) Red (+12 VDC) Blk (GND) 123456789 9dB PC connector + 12-32VDC Supply supplied items).
MX525A Programming Cable Secure cable with tie-wrap MX525A TD(A) TD(B) RD(A) RD(B) GND +12V RS422-RS232 Converter 12 VDC MX525A Programming cable diagram 20 | Installation B&B Electronics RS422-RS232 Converter Model 422LP9TB PC COM1 RS232 RS422 BRN BLU GRN ORG 10-pin Male Connector BLK RED 3 meters NEG +12-32 VDC The programming cable is used for upgrading the software of the GPS and Beacon PCBs inside the MX525A Console.
4 Specifications GPS Receiver Type:....................................................... L1, C/A Code (SPS) 1.575 GHz frequency Channels:................................... 12 Channels, parallel tracking (10-channel when tracking WAAS/EGNOS/MSAS) Position Update Rate:...................1 Hz (default), 5 Hz (optional) Position accuracy: With differential corrections....................<2 meters 2D-RMS depending on distance from differential base station. Without differential corrections................
Frequency offset tolerance: ......................................... + 5 Hz Antenna type:............................................................ H-Field MSK rates:...............................................50, 100 and 200 bps Environmental MX525A Console Operating Temperature:..................................... -30 to +55 °C Storage Temperature:........................................-40 to +85 °C Humidity:..................
Power/Data Connector:... 3-meter, 10-wire Shielded Twisted Pair Antenna Connector:............................................ TNC (female) MGL-3 Dimensions:................ 12.7 cm (L) x 12.7 cm. (W) x 7.6 cm. (H) Weight: ....................................................460 grams (1.0 lb.) Antenna Connector:............................................ TNC (female) Mount:............................................................... 1 in.
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5 Data Output The MX525A data output conforms to the NMEA 0183 V3.0 at 4800 baud. Below is a list of the NMEA sentences output: NMEA 0183 V3.0: GGA, GLL, GSA, GSV, GST, RMC and VTG NMEA 0183 Data Output Sentences (1) GGA - Global Positioning System Fix Data Time, position and fix related data for a GPS receiver. $GPGGA,hhmmss,llll.llll,a,yyyyy.yyyy,a,x,xx,x.x,x.x,M,x.x,M,x.
(2) GLL - Geographic Position - Latitude/Longitude Latitude and Longitude of vessel position, time of position fix and status. $GPGLL,llll.llll,a,yyyyy.yyyy,a,hhmmss.
16 ---HDOP 17 ---VDOP (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. $GPGSV,x,x,xx,xx,xx,xxx,xx,....................
3,4 -- Latitude, N/S 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).
6 ---- Standard deviation of latitude error (meters) 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.
(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 1 Notes: 2 3 4 5 6 7 8 9 1 ----- UTC time of the GGA or GNS fix associated with this sentence.
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Doc.no.727007, Rev.
