KCD2-SR-Ex2 Pepperl+Fuchs Switch Amplifier – 2-Channel SIL 2 Isolated Barrier

KCD2-SR-Ex2 | Pepperl+Fuchs | Switch Amplifier

2-channel isolated barrier | Relay output | NAMUR input | SIL 2

This switch amplifier features two isolated channels. It accepts dry contact or NAMUR inputs. Moreover, it provides relay contact outputs. In addition, it includes line fault detection (LFD). The housing is only 12.5 mm wide. Furthermore, it meets SIL 2 per IEC/EN 61508.

Key Highlights

• 2-channel isolated barrier in one housing
• NAMUR input or dry contact
• Relay output with 2 A contact rating
• Line fault detection for breakage and short-circuit
• SIL 2 certified for functional safety
• Power Rail compatible or terminal supply

Technical Data

• Brand: Pepperl+Fuchs
• Model: KCD2-SR-Ex2
• Type: Switch Amplifier (Digital Input)
• Channels: 2
• Supply Voltage: 19 … 30 V DC (Power Rail or terminals)
• Rated Current: ≤ 30 mA
• Power Consumption: ≤ 600 mW
• Input (NAMUR):
  • Open circuit voltage: approx. 10 V DC
  • Short-circuit current: approx. 8 mA
  • Switching point: 1.2 … 2.1 mA
  • Hysteresis: approx. 0.2 mA
• Line Fault Detection:
  • Breakage: I ≤ 0.1 mA
  • Short-circuit: I ≥ 6.5 mA
• Relay Output:
  • Contact rating: 253 V AC / 2 A, 30 V DC / 2 A
  • Minimum switch current: 2 mA at 24 V DC
  • Energized/De-energized delay: ≤ 20 ms
• Switching Frequency: ≤ 10 Hz
• Galvanic Isolation: Reinforced (300 Veff) between Input/Output, Input/Power, Output/Power
• Ambient Temperature: -20 … 60 °C
• Protection Degree: IP20
• Dimensions: 12.5 x 119 x 114 mm (W x H x D)
• Mounting: 35 mm DIN rail

Expert Review & Manager’s Insight

Expert Review: The KCD2-SR-Ex2 is a solid choice for safe signal transfer. The relay outputs handle many loads. LFD finds wiring faults fast. The narrow housing saves rack space. It works well in SIL 2 loops.

Manager’s Insight: This module lowers installation costs. Two channels in one unit save space. The Power Rail option simplifies wiring. It is easy to configure with DIP switches. A reliable workhorse for control cabinets.

Compatibility & Applications

• Compatible Systems: Any PLC or DCS with NAMUR input or dry contact sensors. Works with Pepperl+Fuchs Power Rail.
• Ideal For:
  • Level switches (capacitive, conductive)
  • Proximity sensors (NAMUR)
  • Dry contact pushbuttons or limit switches
  • Rotary encoders with NAMUR output
  • Flow monitors
• Application Scenarios: Chemical plants, oil & gas, water treatment, food processing, and conveyor systems.

Installation & Maintenance

• Installation: Snap onto 35 mm DIN rail. Connect inputs to terminals 1-4. Connect outputs to terminals 5-8. Use Power Rail or terminals 9-10 for supply.
• Configuration: Set DIP switches to adjust functions. Use front labeling space for identification.
• Maintenance: No regular maintenance needed. LEDs show status at a glance. Replace only if faulty.
• Debugging: Check LED indicators. Use LFD to detect broken wires or short-circuits.

Environmental & Immunity

• Temperature Range: -20 to +60 °C (operating)
• Storage Temperature: -40 to +80 °C
• Humidity: 5-95% RH (non-condensing)
• EMC: EN 61326-1:2013 (industrial locations)
• NE 21 compliant

Certifications & Compliance

• ATEX: BASEEFA 06 ATEX 0092 (Ex ia, Ex nA nC)
• IECEx: BAS 06.0025 (Ex ia)
• FM: Control drawing 116-0419 (cFMus)
• UL: Control drawing 116-0420 (cULus)
• SIL: 2 per IEC/EN 61508

Packaging & Delivery

• Package Contents: KCD2-SR-Ex2 module, terminal blocks, documentation.
• Warranty: 12 months from purchase date.
• Shipping: 12-24 hours dispatch via FedEx, UPS, or DHL (tracking provided).

Frequently Asked Questions (FAQ)

• What sensors work with this amplifier?

  It works with NAMUR sensors or dry contacts. Examples: proximity switches, level switches, pushbuttons.

• Can I use it in a hazardous area?

  Yes. It has ATEX and IECEx certification for Ex ia and Ex nA zones.

• How do I set the DIP switches?

  Refer to the manual. They adjust line fault detection and output behavior.

• What is the maximum switching frequency?

  It is 10 Hz. The relay can handle up to 10 switching operations per second.

• Is it compatible with Power Rail?

  Yes, it can draw power from the Pepperl+Fuchs Power Rail or from terminals 9 and 10.

Selection Guide & Expert Tips

• For NAMUR sensors: This module is an excellent match. It supplies power and detects faults.
• For dry contacts: Use the same module. Set LFD to “off” if not needed.
• For high-density cabinets: The 12.5 mm width saves space. Use the Power Rail to reduce wiring.
• Pro tip: Always check the minimum switch current (2 mA) for relay life.
• Safety note: This module provides reinforced isolation. Use it in SIL 2 loops with confidence.

Compare with Similar Models

• KCD2-SR-Ex1 – single-channel version
• KFD2-SR-Ex2 – similar but with transistor output
• KCD2-SCD-Ex1 – for solenoid driver applications

Contact Information Inquiries:
sales@powergearx.com |
+86 18030005825

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