The Pepperl+Fuchs KCD2-STC-Ex1.ES, also cataloged as the KCD2-STC-Ex1.ES SMART Transmitter Power Supply, operates as a dedicated hardware component for galvanic signal isolation and 2-wire transmitter energization within hazardous-area instrumentation loops.

Suffix Breakdown and Model Designation

The model designator breaks down into the KCD2 housing profile, STC functional grouping for SMART transmitter communication transparent operation, Ex1 denoting a single-channel configuration with intrinsic safety approval, and the .ES suffix representing the specific electronic configuration variant equipped with screw terminal connections and power rail capability.

Hardware Specifications

Intrinsic Safety and Signal Conditioning Characteristics

Designed forPepperl+Fuchs K-System architecture, this unit provides galvanic isolation between field instruments located in hazardous zones and control room acquisition hardware. The barrier supports bidirectional digital communication for HART-compatible 2-wire transmitters without signal attenuation. The circuit design maintains precise voltage regulation for loop-powered transmitters while limiting electrical energy transfer into explosive atmospheres in compliance with ATEX and IECEx standards.

Ordering Information and Package Contents

• 1 x Pepperl+Fuchs KCD2-STC-Ex1.ES Isolated Barrier module

• 1 x Integrated removable terminal block set (screw type)

• Manufacturer technical data sheet and safety manual reference document

Electrical Installation and Wiring Guidelines

• Mount the housing securely onto a standard 35 mm DIN rail in a non-hazardous control cabinet or protected enclosure.

• Separate intrinsically safe field wiring strictly from safe-area signal cables in accordance with local electrical safety codes.

• Connect the 24 VDC power supply to the designated power rail terminals or direct power input blocks, observing proper polarity.

• Ground the DIN rail or dedicated shield terminals to maintain electromagnetic compatibility and noise immunity.

• Verify terminal screw torque limits prior to system commissioning to prevent intermittent high-resistance connections.

Frequently Asked Questions

• Q: What is the primary function of the Pepperl+Fuchs KCD2-STC-Ex1.ES?

  A: It supplies power to hazardous-area 2-wire transmitters and isolates the 4-20 mA control signal for safe-area systems.

• Q: Does the module support HART protocol communication?

  A: Yes, it provides bidirectional digital signal transparency for HART-enabled field devices without filtering.

• Q: What is the required DC supply voltage range for operation?

  A: The unit operates reliably with a DC supply voltage ranging between 19 VDC and 30 VDC.

• Q: How is the module mounted inside an industrial enclosure?

  A: It snaps directly onto a standard 35 mm DIN rail conforming to EN 60715 standards.

• Q: What hazardous area classification is supported by this barrier?

  A: It is engineered for Ex i applications interfacing with Zone 0, 1, or 2 hazardous environments.

• Q: Can the unit be installed or replaced while the system is energized?

  A: Hot-swappable installation depends on local safety permits, but wiring changes must only occur in de-energized states.

• Q: What type of terminals are included on this specific .ES model variant?

  A: This model utilizes removable screw terminal blocks for secure conductor retention.

• Q: What is the approximate power dissipation of the device during full load?

  A: The internal power consumption is under 1.2 W, minimizing thermal accumulation within dense control cabinets.