Pepperl+Fuchs KCD2-SCD-1.SP Explosion Proof Isolation Barrier with Bidirectional HART Communication SIL 2 Certified and 12.5 mm Width
Price:
negotiable
MOQ:
1
Delivery Time:
In stock
Brand:
Pepperl Fuchs
Product Description
Pepperl+Fuchs KCD2-SCD-1.SP Single Channel Explosion Proof Isolation Barrier
Product Overview
The KCD2-SCD-1.SP is a high-performance 1-channel SMART current driver from Pepperl+Fuchs K-System, specifically engineered to repeat 4...20 mA control signals from a PLC, DCS, or other control system to drive SMART I/P converters, electrical valves, and valve positioners located on the field side.
This signal conditioner provides complete galvanic isolation between field circuits and control circuits while supporting bidirectional HART communication for intelligent field device configuration and diagnostics. The device features spring terminals with push-in connection technology for fast, vibration-proof wiring.
With a compact 12.5 mm width and SIL 2 certification acc. to IEC/EN 61508, the KCD2-SCD-1.SP is the ideal solution for driving analog output loads in process control, industrial automation, and safety-related applications.
Model Number Decoding
| Code Segment | Meaning |
|---|---|
| KCD2 | K-System, 2-channel housing width (12.5 mm) |
| SCD | SMART Current Driver — analog output signal conditioner |
| -1 | 1-channel |
| .SP | Spring terminals (push-in connection technology) |
The ".SP" suffix denotes spring terminal version; screw terminal versions are available without the ".SP" extension.
Key Features & Benefits
- SMART Current Driver: Repeats 4...20 mA input signals from control systems to drive SMART I/P converters, valves, and positioners on the field side — ideal for analog output applications
- Bidirectional HART Communication: Digital signals can be superimposed on analog values at the field side or control side and transferred bi-directionally — supports HART communicator connection via integrated test sockets
- High Load Drive Capability: Drives loads up to 900 Ω (650 Ω depending on configuration), providing sufficient power for demanding field devices
- Lead Breakage Monitoring: An open field circuit presents high impedance to the control side, allowing alarm conditions to be monitored by the control system
- Galvanic Isolation: Reinforced insulation (300 Veff) between output and power supply, basic insulation between input/output and input/power supply — ensures safe separation of field and control circuits
- SIL 2 Certified: Safety Integrity Level 2 acc. to IEC/EN 61508 — suitable for safety-related applications
- Ultra-Slim Design: Compact 12.5 mm width (housing type A2) maximizes DIN rail density in crowded control cabinets
- Spring Terminal Connection: Push-in connection technology provides fast, vibration-proof, and maintenance-free wiring
- Power Rail Compatibility: Connects to Pepperl+Fuchs Power Rail for simplified daisy-chained power distribution
- DIP Switch Configurable: Easily configurable via front-facing DIP switches for input voltage range and other parameters
Technical Specifications
General
| Parameter | Value |
|---|---|
| Manufacturer | Pepperl+Fuchs SE |
| Product Type | SMART Current Driver / Signal Conditioner |
| Model | KCD2-SCD-1.SP |
| Part Number | 240639 |
| Signal Type | Analog output |
Functional Safety
| Parameter | Value |
|---|---|
| Safety Integrity Level (SIL) | SIL 2 acc. to IEC/EN 61508 |
Supply
| Parameter | Value |
|---|---|
| Connection | Power Rail or terminals 9+, 10- |
| Rated Voltage | 19 ... 30 V DC |
| Ripple | ≤ 10 % |
| Rated Current | ≤ 30 mA at 24 V |
| Power Dissipation | ≤ 600 mW at 20 mA and 500 Ω load |
| Power Consumption | ≤ 700 mW |
Input (Control Side)
| Parameter | Value |
|---|---|
| Connection | terminals 5-, 6+ |
| Input Signal | 4 ... 20 mA, limited to approx. 26 mA |
| Input Voltage | open loop voltage of the control system < 30 V |
| Voltage Drop | approx. 6 V at 20 mA |
| Input Resistance | > 100 kΩ, with field wiring open |
Output (Field Side)
| Parameter | Value |
|---|---|
| Connection | terminals 1+, 2- |
| Voltage | ≥ 18 V at 20 mA (900 Ω load version) |
| Current | 4 ... 20 mA |
| Load | 0 ... 900 Ω (650 Ω depending on configuration) |
| Ripple | 20 mV rms |
Transfer Characteristics
| Parameter | Value |
|---|---|
| Deviation | < 0.1 % of full scale at 20°C (incl. non-linearity and hysteresis) |
| Temp. Influence (-20...70°C) | < 2 µA/K |
| Temp. Influence (-40...-20°C) | < 4 µA/K |
| Frequency Range | 0 ... 3 kHz (-3 dB) |
| Rise Time (10 to 90%) | ≤ 10 ms |
Galvanic Isolation
| Parameter | Value |
|---|---|
| Input/Output | basic insulation, 300 Veff acc. to IEC/EN 61010-1 |
| Input/Power Supply | basic insulation, 300 Veff acc. to IEC/EN 61010-1 |
| Output/Power Supply | reinforced insulation, 300 Veff acc. to IEC/EN 61010-1 |
Ambient Conditions
| Parameter | Value |
|---|---|
| Ambient Temperature | -40 ... 70 °C (-40 ... 158 °F) |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Degree of Protection | IP20 |
| Connection | Spring terminals (push-in technology) |
| Mass | approx. 100 g |
| Dimensions (W x H x D) | 12.5 x 124 x 114 mm (0.5 x 4.9 x 4.5 inch) |
| Housing Type | A2 |
| Mounting | 35 mm DIN mounting rail acc. to EN 60715:2001 |
Function Description
The KCD2-SCD-1.SP provides complete galvanic isolation between field circuits and control circuits. The device repeats the input signal from a control system (PLC, DCS) to drive SMART I/P converters, electrical valves, and positioners located on the field side.
How it works:
- The 4...20 mA control signal from the control system is transferred via a DC/DC converter and repeated at the output terminals to power the field device
- Bidirectional HART communication: Digital signals (HART) can be superimposed on the analog values at either the field side or control side and are transferred bi-directionally
- Integrated test sockets for HART communicator connection are built into the device terminals — no need for external connection boxes
- Lead breakage monitoring: An open field circuit presents high impedance to the control side, allowing alarm conditions to be monitored by the control system
Signal flow:
Control Side (Input) Field Side (Output)
PLC/DCS 4...20 mA ──► KCD2-SCD-1.SP ──► 4...20 mA to SMART I/P
HART Communicator ◄── (Bidirectional HART) ◄── HART-enabled valve/positioner
(Galvanic isolation barrier)
PLC/DCS 4...20 mA ──► KCD2-SCD-1.SP ──► 4...20 mA to SMART I/P
HART Communicator ◄── (Bidirectional HART) ◄── HART-enabled valve/positioner
(Galvanic isolation barrier)
Applications
The KCD2-SCD-1.SP is specifically designed for analog output and SMART field device driving in demanding industrial environments:
| Industry | Application |
|---|---|
| Process Control | Driving I/P converters for pneumatic valve positioning from 4...20 mA control loops |
| Oil & Gas | Controlling SMART valve positioners on remote wellheads and pipeline valves |
| Chemical Processing | Driving electrical actuators and positioners in hazardous area installations |
| Pharmaceutical | SIL 2 certified current driver for safety-related batch control applications |
| Power Generation | Controlling turbine governor valves, boiler feedwater control valves |
| Water/Wastewater | Driving pump VFD setpoints, chemical dosing valve positioners |
Typical field devices connected:
- SMART I/P (current-to-pressure) converters
- Electrical valve actuators
- Valve positioners with HART communication
- Analog input devices requiring 4...20 mA control signals
Why Choose the KCD2-SCD-1.SP?
Optimized for SMART Field Devices — Unlike standard analog output isolators, the KCD2-SCD-1.SP is specifically designed to support bidirectional HART communication, allowing full digital configuration, calibration, and diagnostics of SMART I/P converters and positioners directly through the isolation barrier.
High Load Driving Capability — With up to 900 Ω load capacity and ≥18 V output at 20 mA, the KCD2-SCD-1.SP provides sufficient power to drive demanding field devices even in long cable runs.
Integrated HART Test Sockets — Built-in test sockets eliminate the need for external connection boxes or interrupting the loop to connect a HART communicator — simplifying commissioning and maintenance.
SIL 2 Certified for Safety Applications — Certified acc. to IEC/EN 61508 with SIL 2 rating, the KCD2-SCD-1.SP is suitable for use in safety instrumented systems (SIS) requiring reliable analog output driving.
Space-Saving Design — At just 12.5 mm width, the KCD2-SCD-1.SP provides a complete SMART current driver solution in a compact footprint, maximizing DIN rail density.
Fast, Reliable Wiring — Spring terminal technology with push-in connection provides vibration-proof, maintenance-free wiring that significantly reduces installation time compared to screw terminals.
Proven Pepperl+Fuchs K-System — The K-System is the industry standard for signal conditioning and isolation, trusted globally for reliability, quality, and long service life.
KCD2-SCD-1.SP vs. Related Models
| Model | Channels | Terminal Type | Load Capacity | HART Support | Special Features |
|---|---|---|---|---|---|
| KCD2-SCD-1.SP | 1 | Spring (push-in) | 900 Ω | Yes (bidirectional) | SIL 2, test sockets |
| KCD2-SCD-1 | 1 | Screw | 900 Ω | Yes (bidirectional) | SIL 2, screw terminals |
| KCD2-SCD-1-IL | 1 | Screw | -- | Yes | Intrinsically safe output |
| KFD2-SCD-2 | 2 | Screw | -- | Yes | 2-channel version |
Ordering Information
| Item | Details |
|---|---|
| Part Number | KCD2-SCD-1.SP |
| Manufacturer Part Number | 240639 |
| Brand | Pepperl+Fuchs SE |
| Product Family | K-System |
| Country of Origin | Germany |
| Condition | New, Original, Factory Sealed |
| Minimum Order Quantity | 1 piece |
| Warranty | Manufacturer's standard warranty |
| Shipping | Immediate dispatch via DHL, FedEx, UPS, TNT |
Contact our sales team for volume pricing, datasheet downloads, or technical application support.
Compliance & Certifications
| Certification | Status | Details |
|---|---|---|
| SIL 2 | ✅ Certified | IEC/EN 61508 |
| CE | ✅ Compliant | EMC Directive 2014/30/EU |
| NAMUR | ✅ Compliant | NE 21:2017 |
| RoHS | ✅ Compliant | Lead-free |
| cULus | ✅ Listed | UL approval for North America |
| CCC | ✅ Certified | China Compulsory Certification |
Accessories
| Accessory | Model | Description |
|---|---|---|
| Power Feed Module | KFD2-EB2(.R4A.B)(.SP) | Feeds power to Power Rail |
| Universal Power Rail | UPR-03(-M)(-S) | For daisy-chain power distribution |
| Profile Rail | K-DUCT-GY(-UPR-03) | Cable duct for organized wiring |
Related Products from Pepperl+Fuchs K-System
| Model | Function | Description |
|---|---|---|
| KCD2-SCD-1 | SMART Current Driver | Same function, screw terminals |
| KCD2-STC-1 | SMART Transmitter Conveyor | 4...20 mA input to 4...20 mA output |
| KFD2-CD-1.Ex | Current Driver | Intrinsically safe output for hazardous areas |
| KFD0-CS-2.51P | Current/Voltage Driver | 2-channel, 4...20 mA driver |
| Power Rail | Accessory | Daisy-chain power distribution for K-System modules |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Shenzhen Hengyo Power Technology Co., Limited
Location
Room 2407, B Block No.145 Chengshi Zhuchang Bld, Bagua 2nd Rd, Futian Dist. Shenzhen City, China 518029
Contact Person
Vivian Chan