MEDC DB4B Up to 25W Loudspeaker Range

Eaton’s Crouse-Hinds series MEDC DB4B Loudspeaker range is designed for use in potentially explosive gas and dust atmospheres. Suitable for marine and both onshore and offshore environments in the oil, gas and petrochemical industries.

A high-power, explosion proof loudspeaker, the DB4B was introduced as a replacement for the DB4 with improved intelligibility and acoustic performance.

Certified for use in a wide range of temperatures (from -55°C to +85°C)* the Ex enclosure is manufactured from GRP with a rugged thermoplastic flare ensuring corrosion resistance

The frequency response of the unit ensures that critical voice messages and general alarm tones are highly intelligible.

The specific SPL figure for sensitivity is 1W @ 1m is 110dB whilst at 1m the 25W unit produces 124dB, the 15W unit 122dB and the 8W unit 119dB.

This unit is available in a high number of configurations to suit your specification. Please download the datasheet for customization options.

*Model dependent

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Certifications and compliances

ATEX Ex d Gas:

Cert. no. Baseefa13ATEX0229X.
Certified to: EN60079-0,1
Ex II 2G, Ex db IIC T3/T4/T5/T6 Gb

ATEX Ex d Gas & Dust:
Cert. no. Baseefa13ATEX0231X.
Certified to: EN60079-0,1,31
Ex II 2GD, Ex db IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
IP66 (IP65 short flare)

ATEX Ex de Gas:
Cert. no. Baseefa13ATEX0232X.
Certified to: EN60079-0,1,7
Ex II 2G, Ex db eb IIC T3/T4/T5/T6 Gb

ATEX Ex de Gas & Dust:
Cert. no. Baseefa13ATEX0233X.
Certified to: EN60079-0,1,7,31
Ex II 2GD, Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
IP66 (IP65 short flare)

IECEx Ex d G:
Cert. no. IECEx BAS 13.0112X
Certified to: IEC60079-0,1
Ex db IIC T3/T4/T5/T6 Gb

IECEx Ex d Gas & Dust:
Cert. no. IECEx BAS 13.0113X.
Certified to: IEC60079-0,1,31
Ex db IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
IP66 (IP65 short flare)

IECEx Ex de Gas:
Cert. no. IECEx BAS 13.0114X.
Certified to: IEC60079-0,1,7
Ex db eb IIC T3/T4/T5/T6 Gb

IECEx Ex de Gas & Dust:
Cert. no. IECEx BAS 13.0115X.
Certified to: EN60079-0,1,7,31
Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
IP66 (IP65 short flare)

UL Haz Locs:
UL certified for USA and Canada, listing no. E203310
Class I, Div 2. T4/T5/T6, Groups A-D. Class I, Zone 1, Ex d IIC / AEx d IIC Gb
Class II, Div 1. T135°C/T100°C/T85°C, Groups E,F&G (Canada only*)
Class II, Div 2. T135°C/T100°C/T85°C, Groups F&G. Zone 21 AEx tb IIIC
Class III Div 1 *Contact MEDC for ordering details

UL Ord Locs:
UL certified for USA and Canada, listing no. S8847

TR CU Ex d Gas:
1Ex d IIC T4/T5/T6 Gb

TR CU Ex d Gas & Dust:
1Ex d IIC T4/T5/T6 Gb, Ex tb IIIC T135°C/T100°C/T85°C Db

TR CU Ex de Gas 1Ex de IIC T4/T5/T6 Gb

TR CU Ex de Gas & Dust:
1Ex de IIC T4/T5/T6 Gb, Ex tb IIIC T135°C/T100°C/T85°C Db

Russian Fire Approval:
All TR CU certified units are Russian Fire Approved
CQST Ex d Gas:
Ex d IIC T3/T4/T5/T6 Gb
CQST Ex d Gas & Dust:

Ex d IIC T3/T4/T5/T6 Gb, ExtD A21 IP6X T200°C/T135°C/T100°C/T85°C/
INMETRO Ex d Gas:

Ex db IIC T3/T4/T5/T6 Gb
INMETRO Ex d Gas & Dust:

Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb T200°C/T135°C/T100°C/T85°C Db, IP66 (IP65 short flare)
INMETRO Ex de Gas:

Ex db eb IIC T3/T4/T5/T6 Gb
INMETRO Ex de Gas & Dust:

Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
IP66 (IP65 short flare)

SIL:

SIL 2 certification to IEC61508. Cert number 20151119-4786827453
Type approval:

DNV GL (IEC60945)
Design features
Certified temperature -67°F to +158°F, -55°C to +85°C*
IP66 & IP67/ NEMA 4X & 6
Optional Ex e terminal chamber
124dB at 25W, 1m*
8W, 15W & 25W versions
Power tappings, via integral transformer
Frequency response 350Hz – 8kHz
Ex enclosure – glass reinforced polyester
Flare – high impact thermoplastic polyester
Internal earth stud fitted as standard
Stainless steel mounting bracket and cover screws
Mounting bracket has ratchet facility as standard
Optional swivel bracket available
Optional resettable fuse
* Depending on version

Standard materials
Ex enclosure – flame retardant, UV stable, glass reinforced polyester (GRP)
Flare – flame retardant, high impact, UV stable, thermoplastic polyester (UV stability tested to ISO 4892 part 3)
Bracket, fixings and captive cover screws: 316 stainless steel

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