Serial Interface System RS 422 SYNMET / NAV (SCH 664) - Windaus

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6 Operating Instructions Serial Interface System (SCH 664) 1.5.0 Technical data Interface electronic unit No. SCH 664 unit with up to six serial ports available on screw terminals. Technical Data: Input channels: 12 analogue channels e.g. current, voltage, resistance 3 digital inputs (frequency) 2 digital inputs (status) - serial ports for intelligent sensors (e.g. barometer) Input signals: standardised signals from digital and analogue LAMBRECHT sensors and comparable equipment from other manufacturers. Outputs: data from various sensors in a message format according to NMEA 0183 Baudrate: 4 800 (desired value according to NMEA 0183 V 2.30) selectable range in configuration mode: 300 to 38 400 Transmission rate: between 1 and 3 protocols per second Operating voltage: 115/230 V, 50-60 Hz Power consumption: approx. 30 W Housing: seawater resistant aluminium case with separate screw terminal box Operating temperatures: -20...+70 °C Cable connection: spring terminals Cable inlet: cable glands according to VG 88 812 Weight: app. 10.0 kg depending on integrated options Dimensions: 232 x 241 x 220 mm (W x H x D) without cable inlets Painting grey, RAL 7001 if not stipulated otherwise 2.0.0 Setting into operation 2.1.0 Unpacking There are no special handling instructions for removing the interface housing from the original cardboard box. 2.2.0 Choice of installation place As the digital signals of the RS 232c interface can be transmitted over screened cables with a maximum length up to 25 m, the interface has to be mounted closed to the unit which receives the data (e.g. auto pilot, data distribution box). The RS 422 interface signals can be handled less critical as they can be transmitted via cables up to 1000 m. To facilitate servicing in case of a defect the interface should be easily accessible. 2.3.0 Mounting The interface electronics are mounted on a flat surface with four stainless steel screws and spring washers (size M5). 2.4.0 Electrical connection The electrical connection must be carried out according to the main wiring diagram of the entire system; you will find it in the general part of the system's documentation. To keep the cable inlets watertight special covering material (e.g. RAYCHEM shrink tube) is recommended. The shields of all cables have to be connected to the ground plug-in units of the cable glands. The earthing screw has to be connected to the ship's ground by means of a green/yellow coloured cable and be protected against corrosion with a special acid-free contact grease. Important note: To prevent electrical hazards for installation staff and damages due to short circuits, it is absolutely necessary to switch off the power supply until the installation is finished. Attention: wrong connection may cause a destruction of this and other connected components ! 2.5.0 Cable entries All cables will be linked inside the housing by means of cable glands according to VG standards. The selection of the right cable inlet will be carried out according to the project specific bloc diagram respectively the wiring diagram. The corresponding positions are clearly illustrated in the discussed drawings. Due to the small amount of these items a numbering of them has not been carried out. For various outer diameters of the installation cables different sized cable inlets will be delivered together with the item.
Operating Instructions Serial Interface System (SCH 664) 2.6 Setting into operation After having finished the mechanical and electrical installation the whole cabling should be checked before switching on the mains respectively the circuit breaker for the anemometer system. Further switches for service purposes are located on the front panels of the boards. Please get sure they are in the ONposition for operation. Due to some intelligent internal self-check and automatic adjustment routines of the equipment no alignments have to be carried out by the user after the first installation or the replacement of any spares. Apart from wind sensor heating devices all other power supply of external sensor electronic circuits if required will be provided by the in-built DC/DC converters in the system and therefore separate AC converters are not required. The controller of the interface system has an automatic self-start routine in order to start it automatically after switching on the power. Same process gets in function also after mains failures e.t.c. The operation will be indicated by two LED's (designations: DA = data acquisition; DP = data processing) on the front panel of the CPU. Only in case of strong interference causing software errors the reset button can be pressed in order to re-start the internal firmware manually. 2.7 Performance checks First of all it has to be ensured that all three mini-switches on the front-panel are in the on position. The two red LED's on the CPU board have to flash in clockwise intervals. The measuring values obtained from the external display consoles can be compered with measurements from other meteorological sensors on land or from other vessels in the neighbourhood. More detailed test procedures about this subject are mentioned in the documentation for factory acceptance test (FAT), harbour acceptance test (HAT) and sea acceptance test (SAT). More circumference service and maintenance works can be carried out by means of a special simulation and test equipment (STE) LAMBRECHT model No. SCH 463 Mark II which is available to be purchased as an option. Details for its use are described in an own operation manual. In general the procedures have to be carried out at least by two people from the maintenance staff. For the vocal communication between the external sensor located on the mast and a wind data display console a pair of portable tranceivers (walky-talkies) or similar are recommended. 2.8 Message format standard All meteorological data of our SYNMET-NAV interface system get transmitted to others in a message format according to the NMEA 0183 standards which are world-wide in use on civil and naval systems. The standardised message is containing of the elements start sign, talker device identifier, sentence formatters, measuring value(s), field delimiters, check sums and other signs. According to the nomenclature of the National Marine Electronics Association (NMEA) all equipment generating such messages is designated as a "talker" whereas the receiving system is called a "listener". All project specific data and parameters are described in detail in a separate agreement of the Interface Design Specification IDS or a similar document which is signed by the buyer and the manufacturer. 2.9 Built-in test facility = BITE-facility A built-in test (BITE-) facility enables the user to detect various failures of the measuring system in case of malfunctions. The designation of faulty values and errors is described in detail in the Interface Design Specification (IDS) Document as mentioned above. 7
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Serial Interface System RS 422 SYNMET / NAV (SCH 664) - Windaus

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