Product Description
Pepperl+Fuchs KCD2-SCD-Ex1 Switching Input Safety Grid: Comprehensive Product Overview
1. Introduction
The Pepperl+Fuchs KCD2-SCD-Ex1 is a high-performance 1-channel isolated safety barrier designed for intrinsic safety applications in hazardous environments. It serves as a critical component in industrial automation systems, enabling safe and reliable communication between control systems (safe area) and field devices (hazardous area) such as SMART I/P converters, solenoid valves, and valve positioners. This device is engineered to meet stringent safety standards, including SIL2 (Safety Integrity Level 2) per IEC 61508, and is certified for use in Zone 0/1/2 (gas) and Zone 20/21/22 (dust) environments.
Detailed Photos
2. Key Features
The KCD2-SCD-Ex1 integrates advanced functionalities to ensure operational safety and precision:
Intrinsic Safety Compliance: Supports Ex ia IIC and Ex iaD certifications, making it suitable for explosive atmospheres.
HART Communication: Facilitates bidirectional digital signal transmission over analog loops, compatible with HART-enabled devices via integrated 250 Ω resistor (terminals 6+ and 8+).
High Accuracy: Delivers a deviation of ≤ ±0.1% across the 4-20 mA range, with minimal temperature influence (<2 µA/°C).
Lead Breakage Monitoring: Detects open circuits in field wiring by presenting high input impedance to the control system.
Robust Construction: Compact housing (12.5 mm width) with IP20 protection and DIN rail mounting capability.
Wide Load Capacity: Supports up to 650 Ω load resistance, ensuring compatibility with various actuators and transmitters.
Product Parameters
| Parameter |
Specification |
| Signal Type |
Analog Output |
| Safety Integrity Level (SIL) |
SIL 2 (SC 3) according to IEC/EN 61508 |
| Isolation Type |
1-channel isolated barrier |
| Connection |
Power Rail or terminals 9+, 10- |
| Rated Voltage |
19-30 V DC |
| Ripple |
≤ 10% |
| Power Consumption |
≤ 700 mW |
| Connection Side |
Control Side (Terminals 5-, 6+) |
| Input Signal |
4-20 mA (limited to ~26-30 mA) |
| Input Resistance |
> 100 kΩ (open field wiring) |
| Voltage Drop |
~6 V at 20 mA |
| Connection Side |
Field Side (Terminals 1+, 2-) |
| Output Signal |
4-20 mA |
| Load Capacity |
0-650 Ω |
| Voltage at 20 mA |
≥ 13 V |
| Ripple |
20 mV RMS |
| Accuracy |
≤ ±0.1% full scale (incl. nonlinearity/hysteresis) |
| Temperature Influence |
< 2 µA/K (-20-70°C), < 4 µA/K (-40--20°C) |
| Response Time (Rise/Fall) |
≤ 10 ms (10-90%) |
| Ambient Temperature |
-40-70°C (-40-158°F) |
| Protection Rating |
IP20 |
| ATEX/IECEx Hazardous Area Markings |
[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I |
| FM/UL Certifications |
FM 18 CA 0116 X, FM 19 US 0117 X; UL E106378 |
| Dimensions (W × H × D) |
12.5 × 124 × 114 mm (0.5 × 4.9 × 4.5 in) |
| Mounting |
35 mm DIN rail |
| Weight |
~100 g |
3. Technical Specifications
Electrical Parameters
Power Supply:
Voltage: 19-30 V DC (24 V DC nominal) via Power Rail or terminals 9+/10-.
Power Consumption: ≤700 mW.
Input Signal:
Range: 4-20 mA (limited to ~30 mA).
Voltage Drop: ~6 V or 300 Ω internal resistance at 20 mA.
Output Signal:
Current: 4-20 mA with ≥13 V output voltage at 20 mA.
Ripple: ≤20 mV rms.
Isolation:
Input/Output: 375 V peak isolation per EN 50020.
Input/Power Supply: Reinforced insulation (300 V~).
Environmental and Mechanical
Temperature Range: -20°C to +60°C.
Dimensions: 12.5 x 114 x 124 mm (W x H x D).
Weight: ~100 g.
4. Functional Description
The KCD2-SCD-Ex1 operates as a galvanically isolated interface with the following functionalities:
Signal Conditioning: Converts and isolates analog signals between the control system and field devices, ensuring noise immunity and signal integrity.
HART Integration: Enables configuration and diagnostics via HART communicators through terminals 6+ and 8+.
Fault Detection: Monitors field circuit integrity; an open circuit triggers high impedance on the control side for easy diagnostics.
Dynamic Response: Rapid rise time (≤100 ms) and wide bandwidth (0-3 kHz) for real-time signal processing.
5. Safety and Certifications
The device adheres to global safety standards:
ATEX/IECEx: Certified for Group II (gas) and III (dust) environments under CESI 06 ATEX 021 and IECEx CES 06.0001.
FM/UL Approval: Compliant with FM Class I/II/III Div 1 and UL HazLoc requirements (Control Drawing 16-533FM-12).
EMC Compliance: Meets EN 61326-1 for electromagnetic compatibility.
6. Installation and Configuration
Wiring Guidelines
Power Connection: Use terminals 9+ (24 V DC) and 10- (ground) or integrate with the Power Rail UPR-03 for modular setups.
Field Device Wiring:
Input: Connect to terminals 5- and 6+ for analog/HART signals.
Output: Terminals 1+ and 2- drive the field device (e.g., valve positioner).
HART Resistor: Activate the internal 250 Ω resistor between terminals 6+ and 8+ if loop resistance is insufficient.
LED Indicators
PWR (Green): Indicates power supply status.
7. Applications
The KCD2-SCD-Ex1 is ideal for:
Process Control: Driving SMART I/P converters and valve positioners in oil/gas refineries.
Safety Systems: Integrating with fire/gas detection systems in hazardous zones.
Industrial Automation: Monitoring and controlling actuators in chemical plants or mining operations.
8. Accessories and Complementary Products
Power Rail UPR-03: Modular rail system for centralized power distribution.
KFD2-EB2 Power Feed Modules: Supply up to 100 devices via Power Rail.
9. Maintenance and Troubleshooting
Routine Checks: Verify LED status and ensure terminals are secure.
Lead Breakage: Use control system diagnostics to identify open circuits.
HART Issues: Confirm resistor activation and communicator compatibility.
10. Conclusion
The Pepperl+Fuchs KCD2-SCD-Ex1 is a versatile and reliable safety barrier for hazardous area applications, combining precision, compliance, and ease of integration. Its robust design and advanced features make it indispensable for industries requiring SIL2-compliant, intrinsically safe signal conditioning.
Company Profile
KeRui (weifang) Automation Equipment Co., Ltd. specializes in industrial automation instrument development, production and sales,technical services, and supporting equipment supply of specialized companies. The main products are flow meters, level meters,temperature meters, pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC), DCS distributed control systems, and eight series of more than 1,000 specifications. Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental protection, plastics, food, printing, tobacco, textile, dyeing, and other fields.
Packaging & Shipping
The packaging and transportation of instrumentation in global trade hinges on a synergy of advanced materials, rigorous testing, regulatory compliance, and smart logistics. By adopting hybrid structural designs, leveraging real-time monitoring technologies, and prioritizing sustainability, exporters can ensure the safe, efficient, and cost-effective delivery of precision instruments. Continuous innovation in materials science and IoT integration will further redefine industry standards, enhancing resilience in an increasingly interconnected market.
FAQ
Q: How long will you give me the reply?
A: We will reply to you as soon as we see the information.
Q: What is the delivery time?
A: Our delivery time is within 3-7 days after we get your payment;
for large qty mass orders, the time should be confirmed again for you.
Q: How about your package?
A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package.
Q: How about the payment terms?
A: You can choose T/T.
Q: Do you provide samples?
A: Yes, we have materials in stock to help you to get the samples as soon as we can.
Q: What is the MOQ?
A:1PC.
Q: Can I get a lower price if I order large quantities?
A: Yes, cheaper prices with more bigger size orders.
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