Ex de IIC T4 Gb (Tamb = -50°C to +70°C)*
This certificate is issued as verification that a sample(s), representative of production, was assessed and tested and found to comply with the IEC Standard list below and that the manufacturer's quality system, relating to the Ex products covered by this certificate, was assessed and found to comply with the IECEx Quality system requirements. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
This Unit verification certificate is issued as verification that the Apparatus identified on page 1, was assessed and tested and found to comply with the IEC Standard list below. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
The apparatus and any acceptable variations to it specified in the schedule of this certificate and the identified documents, was found to comply with the following standards:
As this is a Unit Verification Certificate, no QAR is applicable as this certificate is specific to the items listed by serial number or other unique identification.
The DB4BE G Loudspeaker may be rated up to 100V at either 8W, 15W or 25W and comprises a cylindrical body and covers all moulded in Glass reinforced polyester. The front cover is an irregular shape which when fitted forms a chamber for the speaker driver assembly and is permanently sealed/filled with a potting compound. In the front of this cover is a fine stainless steel mesh pressed metal wire element to facilitate sound transmission. The circular rear cover closes an Ex e terminal enclosure and is secured by three M5 stainless steel screws. The screws may be profiled to be retained within the rear cover during assembly/dis-assembly. The Ex e chamber houses a terminal block of either 4, 6 or 8 (2x4) Ex e connections, Component Certified to IECEx SIR 05.0035U.The base of this enclosure then forms the cover of the flameproof chamber and with integral cables passing through a potted bushing arrangement. The terminal enclosure is fixed with six M5 x 20mm long stainless steel socket head screws of grade A2-70 minimum. The screws may be profiled to be retained within the rear cover during assembly/dis-assembly. The flameproof chamber houses an assembly of a transformer and a control/terminal PCB. Up to two M20 or M25 cable entries are provided in the side of the enclosure to accommodate suitably certified cable entry devices.A plastic horn assembly (with either a long or short flare) is fitted externally to the front, and along the sides, of the enclosure, together with a mounting bracket.The 8W units are marked with a T4 (Tamb = -50°C to +70°C) and/or T5 (Tamb = -50°C to +55°C) and/or T6 (Tamb = -50°C to +40°C) Temperature Class/Ambient combination.The 15W units are marked with a T4 (Tamb = -50°C to +65°C) and/or T5 (Tamb = -50°C to +55°C) and/or T6 (Tamb = -50°C to +40°C) Temperature Class/Ambient combination.The 25W units are marked with a T4 (Tamb = -50°C to +55°C) and/or T5 (Tamb = -50°C to +40°C) Temperature Class/Ambient combination.Variation 0.1The DB3BE G Sounder is rated up to 254V, 15W and is identical in construction to the above Loudspeaker except that the flameproof chamber contains different components, including sound generating PCB’s (with both AC & DC variants)
The DB3BE G Sounders are marked with a T4 (Tamb = -50°C to +70°C) and/or T5 (Tamb = -50°C to +55°C) and/or T6 (Tamb = -50°C to +40°C) Temperature Class/Ambient combination
1. For replacement purposes the cover fixing screws shall be of stainless steel grade A2-70 or stronger 2. Painting and surface finishes, other than those applied by the manufacturer, are not permitted3. Not more than one single or multiple strand wiring lead shall be connected into either side of any terminal, unless multiple conductors have been joined in a suitable manner, e.g. two conductors into a single insulated crimped boot lace ferrule.4. Leads connected to the terminals shall be insulated for at least 275V and this insulation shall extend to within 1mm of the metal of the terminal throat.5. Minimum creepage and clearance distances between the terminals and adjacent conductive parts (including cable entry devices) must be at least 6mm.6. All terminal screws, used and unused, shall be tightened down. 7. If used internal optional earthing material shall be anti-corrosive.
To allow an optional configurations of the internal and external earthing arrangement
File Reference: 18/0253