HMR3000-DEMO-232

SENSOR PRODUCTS APPLICATIONS Oceanographic – Marine Compassing – Positioning of Buoys, Underwater Structures Drilling – Down Hole and Directional Attitude Reference Heading – Navigation of Unmanned Vehicles – Avionic Compassing Integration with GPS – Dead Reckoning Satellite Antenna Positioning Laser Range Finders – Surveying Applications Digital Compass Module HMR3000 E lectronic compass module that provides heading, pitch and roll output for navigation and guidance systems. Honeywell’s solid state magnetoresistive sensors make this strapdown compass both rugged and reliable. This compass provides fast response time up to 20 Hertz and high heading accuracy of 0.5° with 0.1° resolution. FEATURES AND BENEFITS Fast Response Time Built with solid state magnetic sensors and no moving parts improves response time, allowing faster updates compared to gimballed fluxgates. Available as a circuit board 1.2 x 2.95 inches, weighing less than one ounce, or in an aluminum enclosure. Operates with less than 35 mA, allowing for long operation with a battery. Accuracy better than 0.5° with 0.1° resolution for critical positioning applications. Tilt range of ±40° for both the roll and pitch allows operation for most applications. Calibration routines to compensate for distortion due to nearby ferrous objects and stray fields, such as vehicles. User settings of baud rate, update rate, output format, units, filter settings, deviation angles, alarms and warnings are stored internally in non-volitile memory. Small Size Low Power High Accuracy Wide Tilt Range Hard Iron Compensation User Configurable Features HMR3000 INTERFACE SIGNAL DESCRIPTIONS Communication HMR3000 communicates with an external host via RS232 or RS-485 electrical standard through simple ASCII character strings. ASCII characters are transmitted and received using 1 Start bit, 8 Data bits, (LSB first, MSB always 0), no parity, and 1 Stop bit. Baud rate is user configurable to 1200, 2400, 4800, 9600, 19,200 or 38,400. HMR3000 responds to all valid inputs received with correct checksum value. Compass Output HMR3000 can output three NMEA standard sentences, (HDG, HDT and XDR), three proprietary sentences SENSOR PRODUCTS (HPR, RCD and CCD), and an ASCII heading output for a digital display. HDG, HDT and HPR are the most commonly used sentences; the formats are given below. $HCHDG, Heading, Deviation, Variation $HCHDG,85.5,0.0,E,0.0,E*77 $HCHDT, Heading, True $HCHDT,271.1,T*2C $PTNTHPR, Heading, Pitch and Roll $PTNTHPR, Heading,Heading Status,Pitch,Pitch Status,Roll,Roll Status*hh $PTNTHPR,85.9,N,-0.9,N,0.8,N*2C The table shows pin assignments for the 9-pin D-shell connector. Power input can be either regulated 5V dc or unregulated 6V to 15V. Only one of the two power pins (9 or 8) should be connected in a given installation. Name TxD / B RxD / A GND 6-15V 5V Oper / Calib (2) Run / Stop (2) Ready / Sleep (2) Cont / Reset (2) In/Out Pin Description Out In In In In In In In In 2 3 5 9 8 1 6 4 7 RS-232 transmit out / RS-485 RS-232 receive in / RS-485 Power and signal common Unregulated power input Regulated power input Operate / Calibrate (3) input (open = Operate) Run / Stop (3) input (open = Run) Ready / Sleep (3) input (open = Ready) Continue / Reset (3) input (open = Continue) Typ — — — 6 – 15 5 ± 5% 0– 5 0– 5 0– 5 0– 5 Min (1) Max (1) Units -18 -18 18 18 V dc V dc 0 0 -20 -20 -20 -20 30 7.5 20 20 20 14 V dc V dc V dc V dc V dc V dc (1) Absolute maximum ratings. (2) Sink current requirement; 200 (Typ) 400 (Max) µA. (3) Open input = high logic state. 2 HMR3000 SPECIFICATIONS Parameter Value Comments SENSOR PRODUCTS Heading Accuracy (1) Repeatability (3) (4) Resolution Units < 0.5° RMS (2) < 1.5° RMS ± 0.3° 0.1° degrees / mils User selectable Dip < 50° , Tilt