Hazardous-Area Solenoid Control Solution – Pepperl+Fuchs KCD2-SCD-EX1 | KCD2 Series
Where This Product Is Used
The Pepperl+Fuchs KCD2-SCD-EX1 is a 1-channel isolated barrier engineered to drive solenoid valves and binary actuators located in ATEX / IECEx Zone 0, Zone 1, and Zone 2 explosive atmospheres. Typical deployment environments include:
- Oil & Gas upstream/midstream – wellhead shutdown valves, pipeline ESD loops
- Chemical & Petrochemical plants – reactor feed isolation, solvent-handling skids
- Pharmaceutical manufacturing – solvent-room process valves, CIP/SIP actuators
- Offshore platforms – subsea control panels, topsides safety instrumented systems (SIS)
- Grain & dust-handling facilities – dust-ignition-proof solenoid control (Zone 21/22)
- Wastewater treatment – methane-zone valve automation
Wherever a PLC or DCS safe-area output must energise a field solenoid across an intrinsic-safety barrier, the KCD2-SCD-EX1 provides the certified, galvanically isolated interface.
Technical Specifications
| Parameter | Value |
|---|---|
| Model / SKU | KCD2-SCD-EX1 |
| Channels | 1 |
| Function | Solenoid / binary output driver (isolated barrier) |
| Supply Voltage | 20–30 VDC (24 VDC nominal), via K-Bus or external |
| Output (field side) | Intrinsically safe Ex ia IIC / IIB |
| Max. Output Voltage | ≤ 27.4 V (Uo) |
| Max. Output Current | ≤ 96 mA (Io) |
| Max. Output Power | ≤ 660 mW (Po) |
| Galvanic Isolation | Safe area ↔ hazardous area ↔ power supply |
| Mounting | DIN rail (EN 60715 TH35) |
| Housing Width | 12.5 mm |
| Operating Temperature | –20 °C … +60 °C |
| Protection Degree | IP20 |
| Weight | approx. 630 g (packaged) |
| Certifications | ATEX, IECEx, cULus |
| Ex Marking | II (1) G [Ex ia Ga] IIC / II (1) D [Ex ia Da] IIIC |
Why Engineers Specify This Model
- Triple galvanic isolation – eliminates ground loops between field, control, and power rails, critical in large plant earthing systems.
- Narrow 12.5 mm pitch – maximises channel density in marshalling cabinets; 80 channels per metre of DIN rail.
- K-Bus power sharing – adjacent KCD2 modules share 24 VDC via bus connector, reducing wiring and fuse count.
- LED status indication – green power LED + yellow output LED enable rapid loop-check without a multimeter.
- IIC gas group rating – covers hydrogen and acetylene atmospheres, the most demanding classification.
- SIL 2 capable – suitable for use in IEC 61511 Safety Instrumented Functions when assessed per manufacturer’s FMEDA.
- Plug-in screw terminals – field wiring can be disconnected without disturbing the module, simplifying maintenance.
Complete System Bill of Materials
A typical KCD2-SCD-EX1 installation requires the following complementary components:
- KCD2-SCD-EX1 – this module (1 per solenoid channel)
- F-LB-SYSTEM or F-LB-RACK – DIN-rail carrier / bus system for K-Bus power distribution
- KFD2-EB2.R4A.B – 24 VDC power feed module (1 per segment, up to 40 KCD2 modules)
- Zener barrier or cable gland – field-side cable entry with appropriate Ex certification
- IS solenoid valve – rated Ex ia, matched to Uo/Io/Po parameters above
- PLC digital output card – 24 VDC sink/source, standard safe-area type
Compliance & Industry Standards
- ATEX Directive 2014/34/EU – Category 1 G/D apparatus
- IECEx Scheme – IECEx PTB certificate
- EN 60079-0, EN 60079-11 (Intrinsic Safety)
- IEC 61508 / IEC 61511 – Functional Safety (SIL 2 capable)
- cULus Listed – Class I, Division 1, Groups A–D (North American market)
- EN 61000-6-2 / EN 61000-6-4 – EMC Immunity & Emission
Quality Assurance & Sourcing
Konmask.com sources the KCD2-SCD-EX1 exclusively from authorised Pepperl+Fuchs distribution channels and verified industrial surplus partners. Every unit is:
- Inspected for original manufacturer packaging and label integrity
- Cross-referenced against Pepperl+Fuchs serial-number traceability records
- Tested for power-on LED function prior to dispatch
- Shipped with original datasheet and EU Declaration of Conformity where available
We do not sell counterfeit, re-marked, or unverified product. Certificate of conformance (CoC) available on request.
How to Source This Part
- Add to cart – standard checkout with DHL / FedEx international express options.
- Request a quote – for orders of 5+ units, email support@konmask.com for volume pricing.
- Urgent requirement – call/WhatsApp +0086 19859288691 for same-day shipping confirmation.
- ERP / blanket orders – we support scheduled releases and consignment stock arrangements for MRO teams.
Application-Specific FAQ
Q: Can the KCD2-SCD-EX1 drive a solenoid valve rated at 24 VDC / 50 mA?
A: Yes. The module’s Io of 96 mA and Uo of 27.4 V comfortably cover a 24 VDC / 50 mA IS-rated solenoid, provided the solenoid’s entity parameters (Ci, Li) are within the module’s allowed connected capacitance and inductance.
Q: Is this module suitable for Zone 0 installations?
A: The field-side circuit is certified [Ex ia Ga] IIC, which permits installation of connected apparatus (the solenoid) in Zone 0. The KCD2-SCD-EX1 module itself is mounted in the safe area.
Q: Can I mix KCD2-SCD-EX1 with other KCD2 modules on the same K-Bus segment?
A: Yes. All KCD2-series modules share the same 12.5 mm footprint and K-Bus connector, allowing mixed I/O types on a single DIN-rail segment powered by one KFD2-EB2 feed module.
Q: What is the maximum cable length to the field solenoid?
A: Cable length is limited by the combined cable capacitance and inductance relative to the module’s Po and Lo/Co parameters. Consult the Pepperl+Fuchs entity parameter table and IEC 60079-14 for site-specific cable calculations.
Q: Do you provide an ATEX certificate copy with the shipment?
A: Yes, a copy of the ATEX/IECEx certificate and EU Declaration of Conformity is included with every shipment on request.
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