MEDC DB7 Manuel Technique page 5

1.0 Introduction
The Sounder should be positioned using the two of the 4
available fixing holes in the base. MEDC recommend that
stainless steel nuts and bolts be used, if the environment
is corrosive.
The Sounder will operate in any attitude – from horizontal
to vertical. However, it is important to note that the
alignment of the Sounder should ensure that:-
1. Dust or debris cannot lodge or settle in the
cover apertures.
2. Water from hoses, jets or rain cannot settle in the
cover apertures.
The Sounder should be installed in accordance with
certified parameters.
This apparatus has been designed in accordance with
EN50 014 and EN50 020, therefore the apparatus has
been designed to meet the fault tolerant requirements of
Electrical Apparatus for Category 'ia'.
This product is an electrical apparatus and must be
installed in the hazardous area in accordance with the
requirements of the EC Type Examination Certificate.
The installation and maintenance must be carried out in
accordance with all appropriate international, national and
local standard codes of practice and site regulations for
intrinsically safe apparatus and in accordance with the
instructions contained within this manual. Access to the
circuitry must not be made during operation.
The equipment must only be installed, operated and
maintained by trained competent personnel.
The product must not be installed in a position where it
may be attacked by aggressive substances.
1.1 Removing/Replacing the Cover/Horn
Remove the cover/horn of the sounder by unscrewing the
3 fixing screws (hexagon key size 3mm AF), and pulling
the cover/horn gently away from the base.
Replacing the cover/horn is a reverse process of the
above, but care should be taken to ensure that the seal is
securely located in its groove during re-assembly.
1.2 Cable termination
Cable termination should be in accordance with
specifications applying to the application. MEDC
recommend that all cables and cores should be fully
identified. Ensure that only the correct glands are used
and that the assembly is shrouded.
Technical Manual for The SounderS dB7 TM133 Issue D August 2019 www.eaton.com
Technical manual for the Sounders DB7
2.0
Operation
The product must be protected from excessive dust.
During the operation of the Sounder, ensure it is
checked at regular intervals to ensure that no debris has
collected in the cover apertures or that the Sounder has
not been damaged.
The product must not be subjected to mechanical and
thermal stresses in excess of those permitted in the
certification documentation and this manual.
There are no exposed parts of the apparatus which produce
excessive surface temperature, infrared, electromagnetic,
ionising radiation or non electrical dangers.
Information regarding tone selection and installation is
contained within each unit supplied.
The product has been designed such that the protection
afforded will not be reduced due to the corrosion of
materials, electrical conductivity, impact strength, ageing
resistance and the effects of temperature variation.
3.0
Maintenance
During the working life of the Sounder, it should require
little or no maintenance. However, if abnormal or unusual
environmental conditions occur due to plant damage or
accident etc., then visual inspection is recommended.
The product cannot be repaired by the user and must be
replaced by an identical unit.
4.0 Certifications
EEx ia Unit (ATEX Certification No. BAS 00ATEX1260):
II1G EEx ia IIC T4 (Tamb. -55˚C to +70˚C)
II1G EEx ia IIB T4 (Tamb. -55˚C to +70˚C)
The ATEX certificate and the product label carry the
ATEX group and category marking:
II 1 G
Where:
Signifies compliance with ATEX
II Signifies suitability for use in surface industries
1 Signifies suitability for use in a zone 0 area
G Signifies suitability for use in the presence of gases
0Exia Unit (Gost Certification No. A-0758):
0Exia IIC T4 or 0Exia IIB T4
Admissible Ambient Temperature: -55°C to +70°C
English
1