MEDC PB Call Point | ATEX IECEx Explosion Proof & Hazardous Area Call Points
MEDC PB are ATEX call points designed for use in the most arduous environmental conditions. The hazardous area call points, manufactured by MEDC, are manually operated fire alarms that are both simple to install and maintain in explosive atmospheres in onshore or offshore locations in accordance with the ATEX & IECEx certification and explosion protection levels.
The GRP enclosure of the hazardous area call point is suitable for use onshore or offshore where light weight combined with a high level of corrosion resistance is required. The unit is now supplied with a lift flap that latches firmly in place.
➡ View the complete range of MEDC call points.
ATEX Call Points Zone 1 & Zone 2
Call Point Order Code MEDC PB.
- Glass reinforced polyester enclosure – light, strong and not subject to corrosion.
- The call point is now supplied with a lift flap that latches firmly in place.
- 4 basic versions available
- (1) Explosion protected Exe (ATEX, TR CU, Chinese CQST, INMETRO)
- (2) Explosion protected Exi (ATEX, IECEx, TR CU, CQST, CSA)
- (3) Weatherproof & Dust-tight/UL ordinary locations.
- (4) Explosion protected:
- Class I, Div. 2,
- Groups A-D
- Class II, Div. 2,
- Groups F & G
- Class I, Zone 2
- SIL2 certified
- DNV certified
- In line and end of line resistors and/or zener diodes can be fitted.
- Variety of colours available.
- Up to 9 terminals available.
- Optional LED – this indicates that the unit has been operated – useful for testing purposes.
- Earth continuity option for metal glands.
- 1 or 2 changeover switches.
- Captive cover screws.
Hazardous Area Guide
♦ Definition : Potentially explosive atmospheres exist where there is a risk of explosion due to mixtures of gas/air, vapour/air, dust/air or other flammable combinations. Where electrical equipment has to be used in these areas, it must be so designed and constructed such that it does not create sources of ignition capable of igniting these mixtures.
♦ Area Classification : Process plants are divided into Zones (European and IEC method) or Divisions (North American method) according to the likelihood of a potentially explosive atmosphere being present. Note: North American legislation now allows Zones to be used to classify areas, where this practice is used it follows the IEC Zone method.
|European ATEX & IEC Classification||Definition of Zone or Division||North American Classification|
|Zone 0 (gases)||A hazardous area in which an explosive mixture is continuously present or present for long periods||Class I Division I (gases)|
|Zone 20 (dusts)||Class II Division 1 (dusts)|
|Zone 1 (gases)||A hazardous area in which an explosive mixture is likely to occur in normal operation||Class I Division 1 (gases)|
|Zone 21 (dusts)||Class II Division 1 (dusts)|
|Zone 2 (gases)||A hazardous area in which an explosive mixture is not likely to occur in normal operation and if it occurs it will exist only for a short time||Class I Division 2 (gases)|
Class II Division 2 (dusts)
|Zone 22 (dusts)||Class III Division 1 (fibres)|
Class III Division 2 (fibres)
MEDC PB Hazardous Area Manual Call Point
|Hazardous Area Certifications|
|ATEX Ex de||Cert. no. BAS02ATEX2105X. ATEX Approved Ex II 2GD|
EN60079-0, EN60079-1, EN60079-7, EN60079-31
Ex de IIC T6 Gb, Ex tb IIIC T85ºC Db (switch only)
Ex de mb IIC T6 Gb, Ex tb IIIC T85ºC Db (with LED)
Ex de mb IIC T4 Gb, Ex tb IIIC T135ºC Db (with resistors & diodes)
|ATEX Ex ia||Cert no. Baseefa 03ATEX0084X. ATEX Approved Ex II 1GD|
Certified to: EN60079-0, EN60079-11
Ex ia IIC T4 Ga , Ex ia IIIC T135ºC Da
|IECEx Ex ia||Cert. no. IECEx BAS 12.0093X|
Certified to: IEC 60079-0, IEC 60079-11
Ex ia IIC T4 Ga, Ex ia IIIC T135ºC Da
|UL||Listing no. E186629|
UL listed to Class 1, Div 2. Groups A,B,C & D
UL listed for Ordinary Locations. Listing no. S8117
|CSA||Cert. no. 79120-3. Class 1 groups A,B,C & D|
|TR CU Ex ed||1Ex d e IIC T6 Gb, Ex tb IIIC T85°C Db (switch only)|
1Ex d e mb IIC T6 Gb X, Ex tb IIIC T85°C Db X (with LED)
1Ex d e mb IIC T4 Gb X, Ex tb IIIC T135°C Db X (with resistors & diodes)
Russian Fire approved (Must be red and have burning house duty l
|TR CU Ex ia||0Ex ia IIC T4 Ga X, Ex ia IIIC T135°C Da|
Russian Fire approved (must be red and have burning house duty label)
|INMETRO Ex d||Ex de IIC T6 Gb (Switch only), Ex de mb IIC T4 Gb (other versions)|
|CQST Exd||Ex de IIC T6 (switch only), Ex de mb IIC T4 (other versions)|
|CQST Exia||Exia IIC T4|
|Type Approvals||American Bureau of Shipping type approval (ABS) PBI only|
DNV (IEC 60945)
|SIL||SIL2 Certification to IEC61508. Cert no. 20151118-4786827453|
|Material||Anti-static UV resistant glass reinforced polyester|
|Finish||Red painted finish as standard or to customer specification|
|Voltage||Up to 250Vac. Up to 50Vdc (model dependent)|
|Weight||1.2 kg. (Varies with models and entries)|
|Ingress Protection||IP66 & IP67|
|Entries||Up to 4 entries, M16 or M20 top and bottom (1/2” NPT available on UL version)|
|Entries||Up to 4 x M20 or M25 ISO Ex d/Ex ia|
Up to 4 x 1/2” or 3/4” NPT UL
|Terminals||7 x 2.5sqmm – standard|
9 x 2.5sqmm optional – up to 60V only
|Resistor||Various configurations available on versions up to 24V and all ‘IS’ versions.|
(Minimum Resistor value 100ΩPBE, 470ΩPBI)
|Earth continuity||Internal and external earth continuity is provided with an optional earth plate|
|LED indication||A high intensity red LED can be fitted as an optional extra to indicate|
operation on versions up to 24V and all ‘IS’ versions
As standard the LED is not provided with over current protection. The forward
current (If) should be limited to 20mA
|Labelling||Duty label – worded to customers requirements. Riveted on|
Tag label – worded to customers requirements. Screwed on
|Switch ratings (1 or 2|
changeover switches fitted)
|Switch only 30Vdc 5A (resistive) or 3A (inductive)|
30-50Vdc 1A (resistive or inductive)
250Vac 5A (resistive or inductive)
LED 24Vdc 0.05A
Resistor(s) 24Vdc 0.05A
MEDC PB – Ordering Requirements
The following code is designed to help in selection of the correct MEDC hazardous area call point with ATEX approval and certification. Build up the part number of the call point by inserting the code for each component into the appropriate box.
MEDC have developed ATEX & IECEx call points designed for harsh and hazardous area conditions and where there is a risk of explosion due to the presence of flammable atmospheres both onshore and offshore – since 1975 MEDC have been designers and manufacturers of Explosion Proof alarm, signal, control and communications equipment.
Thorne & Derrick International, based in the UK, distribute the extensive range of Eaton MEDC ATEX Certified manual call points, visual, audible alarms, loudspeakers and telephones for hazardous area workplaces, including Zone 1 & Zone 2 explosive atmospheres.