ABB CBI 22-P EX 3BDH000732R1 – Explosion-Proof Pushbutton Station for Hazardous Areas

The ABB CBI 22-P EX (3BDH000732R1) is a robust, explosion-proof control station designed for safe operator intervention in hazardous environments where flammable gases, vapors, or combustible dust may be present.

Add to quote
Category:

Description

Product model CBI 22-P EX
ABB order code 3BDH000732R1
Manufacturer ABB
Product category Explosion-proof control station / command device
Housing material Stainless steel (AISI 316L)
Protection rating IP66 (dust-tight & powerful water jets)
Explosion protection Flameproof enclosure “d” per IEC 60079-1
Certifications ATEX (II 2G Ex db IIC T6 Gb / II 2D Ex tb IIIC T85°C Db), IECEx, INMETRO, EAC
Hazardous zones Gas: Zone 1; Dust: Zone 21
Switch configuration 1 × Emergency stop (red mushroom, 40 mm), 1 × Selector switch (2-position)
Contact rating 6 A / 690 V AC (AC-15), 2NO + 2NC per element
Operating temperature –25°C to +60°C
SIL capability Up to SIL 2 (per IEC 61508/62061, when used in safety circuits)
Mounting Wall-mounted or panel-mounted (with optional bracket)

📘 Product Introduction

The ABB CBI 22-P EX (3BDH000732R1) is a robust, explosion-proof control station designed for safe operator intervention in hazardous environments where flammable gases, vapors, or combustible dust may be present. Built to meet stringent international safety standards—including ATEX, IECEx, and IEC 60079—the unit features a rugged AISI 316L stainless steel enclosure, making it ideal for demanding applications in oil & gas, petrochemical, pharmaceutical, and offshore industries.

This model includes two key control elements:

  • A 40 mm red mushroom-type emergency stop button (compliant with ISO 13850) that latches on actuation and requires manual reset.
  • A 2-position maintained selector switch (e.g., “Local/Remote” or “On/Off”) with clear position indication.

Both components are housed in a single flameproof enclosure rated for Gas Group IIC (the most stringent, covering hydrogen and acetylene) and Dust Group IIIC (conductive dusts like metal powders). The unit’s IP66 rating ensures reliable operation in washdown areas, outdoor installations, or high-humidity zones.

✅ Core Advantages & Technical Highlights

True explosion protection without compromise: Unlike purged or encapsulated alternatives, the CBI 22-P EX uses a certified flameproof “d” design—containing any internal explosion and preventing ignition of the surrounding atmosphere. This eliminates the need for continuous air supply or complex maintenance.

Corrosion resistance for extreme environments: The 316L stainless steel housing resists salt spray, chemical exposure, and UV degradation—critical for offshore platforms, coastal refineries, or food processing plants requiring frequent cleaning.

Integrated safety functionality: The emergency stop meets Category 0 stop requirements under ISO 13850 and can be integrated into safety circuits up to SIL 2 when paired with compatible safety relays or PLCs (e.g., ABB AC 500-S Safety).

Global compliance out of the box: With ATEX, IECEx, INMETRO (Brazil), and EAC (Eurasia) certifications, the 3BDH000732R1 simplifies international project deployment—no need for local re-certification.

Easy installation & maintenance: Pre-wired terminals and standardized M20 or ½” NPT conduit entries reduce field wiring time. The transparent cover allows visual inspection of switch positions without opening the enclosure.

🏭 Typical Application Scenarios

  • Oil & gas processing plants: Used at pump stations or compressor skids in Zone 1 areas to allow safe local shutdown during maintenance or emergencies.
  • Chemical batch reactors: Provides local “Start/Stop” and emergency isolation in rooms handling solvents or volatile compounds.
  • Pharmaceutical cleanrooms: Installed in classified zones where solvent-based cleaning agents create temporary explosive atmospheres.
  • Grain elevators & flour mills: Deployed in Zone 21 dust hazard areas to control conveyors or mixers with explosion-proof reliability.
  • Marine loading terminals: Withstands salt-laden air while enabling safe cargo transfer operations in classified zones.

🔗 Related Products & Accessories

  • CBI 22-S EX (3BDH000731R1): Similar unit with two pushbuttons (e.g., Start/Stop) instead of selector + E-stop.
  • CBI 22-D EX: Double-gang version for more complex control functions.
  • Mounting bracket (3BSE013256R1): For wall or post mounting in non-panel applications.
  • Conduit adapters: M20/½” NPT brass or stainless steel for cable entry sealing.
  • ABB AC 500-S Safety PLC: For integrating the E-stop into a certified safety circuit (SIL 2/PL d).
  • Replacement contact blocks: Standardized ABB PB22 series contacts for easy spare part management.

⚙️ Installation & Maintenance Guidance

Installation:

  • Ensure the enclosure is installed in accordance with local hazardous area zoning diagrams.
  • Use only certified glands and seal unused entries with blanking plugs.
  • Torque terminal screws to 0.8–1.0 Nm to ensure reliable contact without damaging components.
  • Ground the enclosure via the dedicated M6 grounding stud (min. 4 mm² conductor).

Maintenance:

  • Inspect the enclosure gasket annually for cracks or hardening.
  • Test emergency stop function monthly—verify positive-opening contacts and mechanical latching.
  • Clean exterior with mild detergent; avoid chlorine-based cleaners on stainless steel.
  • Do not open the enclosure in a live hazardous area—declassify the zone first per safety procedures.
mingpian

Related products