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Orbis I.S. Timesaver Base

Product code: ORB-MB-50018-RUS

ORB-MB-50018-RUS - Orbis I.S. Timesaver Base
The Orbis IS Optical Smoke Detector works using the light scatter principle and is ideal for applications where slow-burning or smouldering fires are likely.
Full Details
Brand Features

TimeSaver® Base Patented FasTest® enabling functional testing in four seconds DirtAlert® indicates limit of drift compensation Tolerates extreme operating conditions: -40°C to +70 °C False alarm reduction Flashing LED option

Maintenance & Service

Servicing of I.S. fire detectors may be carried out only by BASEEFA authorized body. In practical terms this means that Apollo Orbis I.S. fire detectors may be serviced only by Apollo at its factory. Servicing of the fire detection system should me carried out as recommended by the code of practice BS 5839: Part 1 or other local regulations in force.

Additional Information

The certified system configurations allow for two types of safety barrier, each of which has its own advantages and disadvantages. A brief outline of their characteristics is given below. 1. Single Channel 28V/300Ω Barrier This is the most basic type of barrier and therefore the lowest in cost. Being passive devices, they also impose the minimum of restrictions on the operation of the fire detectors. Thus, single channel barriers are available either as positive or negative polarity where the polarity refers to the polarity of the applied voltage relative to earth. The significance of this is that on side of the barrier must be connected to a high-integrity (safety) earth. Although this earth connection has no effect on the operation of Orbis I.S. devices and is not needed for their correct operation, it may not acceptable to the operation of the control and indicating equipment. It the earth connection is not acceptable then the isolating barriers should be used. 2. Galvanically Isolated Barrier These are also referred to as 'transformer isolated d.c. repeaters', 'isolated interfaces' and 'transformer isolated current repeaters'. They differ from conventional shunt zener barriers in that they provide electrical isolation between the input (safe area) and the output (hazardous area). This is achieved by the use of a DC/DC converter on the input side which is connected to the hazardous area through a voltage and power-limiting resistor/zener combination similar to a conventional barrier. The galvanic isolation technique means that the circuit does not need a high integrity (safety) earth and that the intrinsically safe circuit is fully floating. Earth leakage problems for control and indicating equipment are therefore eliminated if this type of interface is used. Note: Although the circuit does not require a high-integrity earth, it is permissible to earth either polarity of the hazardous area circuit if required by other system considerations. Galvanically isolated barriers are available as single or dual channel versions and are recommended for any application in which direct earth connections are not acceptable. The galcanically isolated barrier is a two-wire device which does not need an external power supply. Safety earth Shunt zener diode safety barriers must be connected to a high integrity earth by at least one and preferably two copper cables, each of cross sectional area of 4mm2 or greater. The connection must be such that the impedance from the connection point to the main power system earth is less than one ohm. Intrinsically safe circuits in the hazardous area should be insulated from earth and and must be capable of withstanding a 500V RMS AC test voltage for at least one minute. When using armoured or copper sheathed cables, the armour or sheath is normally isolated from the safe area busbar.

Additional Information 1

Wiring and cable types It is not permitted to connect more than one circuit in the hazardous area to any one safety barrier and that circuit may not be connected to any other electrical circuit. Both separate and twin cables may be used. A pair contained in a type 'A' or 'B' multicore cable (as defined in clause 12.2.2 of BS EN 600079-14:2008) may also be used, provided that the peak voltage of any circuit contained within the multicore does not exceed 60V. The capacitance and either the inductance to resistance (L/R) ratio of the hazardous area cables must not exceed the parameters specified in datasheet PP2479. The reason for this is that energy can be stored in a cable and it is necessary to use cable in which energy stored is insufficient to ignite an explosive atmosphere. To calculate the total capacitance or inductance for the length of cables in the hazardous area, refer to datasheet PP2479, which gives typical per kilometer capacitance and and inductance for commonly used cables. (Note: all Orbis I.S. devices have zero equivalent capacitance and inductance.) Maximum loading of I.S. circuit Because of the finite resistance of the safety barrier, there will be a limit to the current drain which can be tolerated before the voltages on the circuit fall outside the specified limits for Orbis I.S. devices. The system certification allows up to 250 Orbis I.S. detectors to be connected to a single barrier circuit with an end-of-line resistor or not less than 1.8Ω. However, it must be ensure that the voltage available at each detector is above at the minimum specified in the quiescent condition. It is also important to ensure that the alarm load is suitable for the control and indicating equipment. the system certification also allows the use of remote LED indicators. These may be connected to individual detectors or may use a connection common to two or more detectors.

Product Information

The Orbis IS Optical Smoke Detector works using the light scatter principle and is ideal for applications where slow-burning or smouldering fires are likely.

Key Features

Grouped terminals to make wiring easy Two fixing centres LED alignment mark Detector locking mechanism

Additional Information 2

Installation It is important that the Orbis I.S. detectors be installed in such a way that all terminals and connections are protected to at least IP20 when the detector is in the base. Special care must be taken with the rear of the mounting base where live metal parts may be accessible. Flush mounting of the base on a flat surface will provide the required degree of protection. The conduit box available from Apollo, part no. 45681-204, is also acceptable for mounting I.S. bases. Apollo also supply a range of deckhead mounting boxes. For more information, please refer to PP1089, bases and accessories brochure. Note that the earth terminal in the base is provided for convenience where continuity of a cable sheath or similar is required. It is not necessary for the correct operation of the detector nor is it provided as a termination point for a safety earth.

Additional Information 3

Accessories DIN/Rail Interface enclosures Two DIN-Rail interface enclosures are available for housing intrinsically safe (I.S.) barriers. The enclosures have a frosted polycarbonate lid through which LEDs can be viewed. A multi-purpose label, that features a section for use with I.S. systems is supplied. Part nos 29600-239 (2-way enclosure); 29600-2400 (8-way enclosure). When using these enclosures with intrinsically safe system, it is important that segregation be provided between the I.S an non-I.S. circuits. A distance of at least 50mm must be preserved between live conducting parts of I.S. and other circuits. If the enclosure is used as part of an I.S. circuit, then it must always be installed inside the safe area. Never install these enclosures in the hazardous area. Remote LED connection A drive point is provided on each of the Orbis I.S. detectors for a remote LED indicator. The indicator must be a standard high-efficiency red LED and does not require a series limiting resistor since current is limited by the detectors. The system certification allows for the use of any LED indicator having a surface area between 20mm2 and 10cm2 which covers all commonly used case styles from T1 (3mm) upwards but would exclude some miniature and surface mounted types. Additional requirements of the certification are that the LED and its terminations must be afforded a degree of protection of at least OP20 and must be segregated from other circuits and conductors as defined in BS EN 60079-14:2008. The Apollo MiniDisc remote indicator (53832-070) may be used with Orbis I.S. detectors. The MiniDisc remote indicator is only 20mm high and 80 mm in diameter. It comprises two parts - the base, which is installed onto a wall or soffit and the lid, which is fitted to the base with a bayonet fitting. An anti-tamper screw in the lid locks the unit together. A 1.5mm hexagonal driver, part number 29600-095, us available from Apollo. Two pairs of keyholes are provided - one for 50mm and the other for 60mm - fixing centres. Portable Flame Detector Test Unit A portable Flame Detector Tes Unit is available, part number 29600-226. Adjustable Mounting Bracket, part number 29600-458 (comes complete with Deckhead Mounting Box). Deckhead Mounting Box, part number 45681-217.

General
Warranty10 year
Conformance
Approvals
  • VNIIPO
  • NANIO
  • Kazak
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Certification Documents
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