Asynchronous Data transceiver N552 model, User Manual
Contents
1. Asynchronous Data transceiver N552 model User Manual INITIAL INSPECTION Please check that the contents of the consignment are correct and verify that no element has been damaged during the transport In case of mistaken or damaged material please state an immediate claim to the transport carrier and notify it immediately to the manufacturer or distributor either for a new remittance or for the repair or replacement of the damaged material SAFETY CONSIDERATIONS All the devices described in this manual have been designed to be properly performed by qualified technical personnel only Personnel skilled enough to foresee the possible consequences of inadequate handling must carry out the installation setting maintenance or repair of this equipment For a correct and safe use of the provided equipment and in order to achieve the best possible security conditions it is essential to follow not only general security procedures but also the special ones described in this manual Never switch on the systems in case there is the smallest suspicion of bad functioning For instance in case of detecting apparent damages which could be consequence of transport or storage etc Before any setting or maintenance operation disconnect the equipment from any power supply or optical emitter After electrical disconnection inside capacitors could remain loaded for one second Active power circuitry could appear when protecting lids or coveri2. akes place with the assistance of light focusing elements magnifying glasses microscopes etc In case these recommendations are not followed eyes would be exposed to a level of light radiation that would be higher than the maximum admissible level This could result in permanent and irreversible damages in eyes LASER RADIATION DONOT STARE INTOBEAM CR VIEW DIRECTLY WITH CPTICAL INSTRUMENTS CLASS 3A LASER PRODUCT The use of controls adjustments or procedures different from the ones specified here could cause a dangerous exposure to radiation Ed 2 0 DESCRIPTION EQUITEL N552 has been designed for long distance fibre optic transmission of one data channel with the following possible line interfaces RS 232 RS 485 2 wires RS 485 4 wires and RS 422 The communication is carried out by means of two optical fibres which allows a full duplex communication between the two ends with all the advantages associated to fibre optic transmission immunity to external electromagnetic interference elimination of the problems related to the existence of earth loops etc N552 has been designed for singlemode or multimode optical fibre links The light emitter which is employed is either a LED diode in multimode fibre or a Laser in singlemode fibre and a PIN photodiode is the light receiver As regards format it is a stand alone box for DIN rail fixation It requires 12 Vdc external power supply EQUITEL model N552
3. equipment is installed it does not require any additional attention for its correct operation For testing purposes these two LED indicators are provided a Tx channel emission 2 in the picture If it is activated it means that a data signal is being received at the electrical connector This signal is to be transmitted by optical fibre through the optical output connector b Rx channel reception 2 in the picture If it is activated it means that a data signal is being transmitted at the electrical connector This signal has been retrieved from the optical signal received at the optical input connector MAINTENANCE This equipment has been designed to require no maintenance periodical operations and to keep a good long term stability In order to prolong the life of the equipment the following rules in optical connection and disconnection must be observed The optical output connectors must be thoroughly cleaned before connecting the equipment Use an optical cleaning paper or gauze dampened with ethylic or isopropilic alcohol Dry carefully the connector afterwards Protect the optical connector of the equipment with the original protector cap every time it is going to be disconnected for a long time Excessive environmental dust and humidity must be avoided during this maintenance phase The introduction of strange mechanical elements in the optical connector may result in irreparable damage in the optical comp
4. is configured as DCE In consequence the equivalent electrical connection between the units located at both ends of the link is the usual one in XON XOFF protocol communications The following photograph shows the most important parts of this device oO aA 2 eeegg080606006 oa oh us i Ti ay abe E Fina Ti Tijk 1 Optical connectors 2 Indicators and power supply terminals CM version 3 Power supply A version and data terminals In N552 equipment terminals 1 2 and 4 correspond to the output input and ground electrical signal Rx Tx and GND of RS 232 interface When RS 422 or RS 485 4w electrical interface is employed terminals 5 and 6 correspond to output signal RxB and RxA terminal 7 and 8 to input signal TxB and TxA and terminal 4 to signal ground GND Terminals 9 10 and 11 are used for RS 422 or RS 485 interface selection If terminals 9 and 10 are short circuited RS 422 is selected If terminals 10 and 11 are short circuited RS 485 is selected In case you want to use RS 485 2w you have to join TxA with RxA and TxB with RxB In RS 485 interface the correct operation of a bus system with several devices in parallel is guaranteed by employing pull up pull down and line termination resistors in the system EQUITEL N552 is provided with terminals 3 and 5 5V and RxB for pull up resistors and terminals 4 and 6 GND and RxA for pull down Typical pull up and pull down resistance val
5. ngs are taken away Likewise unplugged optical connectors must be immediately covered with the corresponding protecting caps In case the equipment needs to be checked while it is functioning remember that maintenance operations can only be carried out by qualified technical personnel who is aware of the risks of the operation both from the electrical and optical point of view The security classification of this product is Class III The modification of the electrical protection elements and the disconnection of the earth terminal may result in personal injury Before the equipment is switched on make sure that it has been properly grounded through the protective conductor of the a c power cable to a socket outlet provided with protective earth contact The earth circuit cover of the electrical external connectors must not be used as protective general earth contact for the equipment The optical transmitters could cause safety problems to the personnel in charge of the installation test service or maintenance of the equipment This is due to the high level of optical power in some fibre optic installations and to the fact that light radiation is infrared type not visible for the human eye In consequence never look directly either at the optical output of an optical transmitter or at the end of an optical fibre connected to an active optical transmitter This situation will be especially dangerous when the inspection t
6. onents TECHNICAL CHARACTERISTICS OPTICAL PARAMETERS Optical emitter LED Laser CM A vers Optical receiver PIN Wavelength note 1 850 nm CM vers 1 310 nm A vers Multimode CM vers Singlemode A vers Optical power peak note 2 gt 11 dBm 10 125 um gt 19 dBm 50 125 um gt 16 dBm 62 5 125 um lt 36 dBm Type of fibre Sensitivity notes 2 and 3 ELECTRICAL PARAMETERS Electrical interface RS 232 RS 422 amp RS 485 Maximum binary rate 64 kbit s asynchronous Operation mode Full duplex half duplex Equivalent electr connection Configured as DCE POWER PARAMETERS Power requirements 12 Vdc Consumption note 1 lt 1W MECHANICAL PARAMETERS Format Box for DIN rail Dimensions 72 x 103 x 72 mm Optical connector ST FC PC CM A vers Electrical connector Screw in terminal ENVIRONMENTAL CONDITIONS Temperature range 40 C to 74 C Humidity range 0 to 95 without condensat INDICATORS Unit in operation Green ON Transmitted data Green TX Received data Green RX Note 1 Typical values as a production average Note 2 Actual values are given in the test sheet These values are measured according to the test procedure for this device 9 Note 3 Value guaranteed for a BER lt 10 in all the operating range The information included in this manual cannot be copied or reproduced in any way without the previous written authorisation of Equipos de Telecomunicaci n Optoelectr nic
7. os S A Equipos de Telecomunicaci n Optoelectr nicos S A Pol gono de Malpica c F oeste G Quejido nave 74 50057 Zaragoza SPAIN Tel 34 976 570 353 E mail mail equitel es Fax 34 976 571 383 www equitel es Published by Equipos de Telecomunicaci n Optoelectr nicos S A Zaragoza May 2005
8. ues are as follows 4 7 kQ if line termination resistors are not employed and 1 5 KQ if 120 Q line termination resistors are employed For further information please see TIA EIA 485 norms INSTALLATION First fix the N552 unit in a DIN 50022 35 rail The single fibre cables must be connected to the optical input and output connectors 1 in the picture after removing the protective cover of the connectors For the optical interconnection of two N552 units the optical output of one of them must be connected to the optical input of the other One and vice versa Remember to replace the protector in case the cable is temporally disconnected Do not connect unless you have previously cleaned the single fibre cable connector with a soft paper dampened with alcohol Introduce the connector carefully in the optical sign input in order to avoid damages in the polished surface Then screw in the data terminal 3 in the picture the data cables that are required for the application and the pull up and pull down resistors that may be necessary Finally connect the external power supply between 12 Vdc and GND CM version 20 and 19 terminals A version 12 and 13 terminals The ON indicator 2 in the picture will turn on If the above mentioned steps have been properly followed and the attenuation and type of fibre specifications for the CQUITEL optical lying have been respected the link will be ready to work OPERATION Once the
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