Overview

The KCD2-STC-EX1 Smart Transmitter Power Supply from Pepperl+Fuchs is part of the K-System DIN-rail mounting series. It provides a 24 V DC supply via Power Rail to energize 2-wire SMART transmitters or current sources in hazardous areas. Moreover, it repeats the input signal to the safe area as either a 4–20 mA current loop or a 1–5 V voltage signal, ensuring accurate and reliable transmission to control systems. In addition, the module supports HART® communication, enabling digital diagnostics and device configuration over the analog loop.

Engineers value the KCD2-STC-EX1 for its compact 12.5 mm housing width and its functional safety rating of up to SIL 2 (SC 3) according to IEC/EN 61508. Therefore, it is widely used in oil, gas, chemical, and pharmaceutical industries where intrinsic safety, signal integrity, and long-term reliability are essential.

Technical Data

Typical Applications

• Hazardous-area transmitter loops requiring intrinsic safety barriers

• Process control systems in chemical plants and refineries

• Pharmaceutical manufacturing requiring precise and safe signal transmission

• Oil and gas platforms needing reliable analog signal isolation

• Automation projects integrating HART® diagnostics into control architectures

For example, offshore operators deploy the KCD2-STC-EX1 to safely transmit analog and HART® signals from field transmitters, while pharmaceutical facilities rely on its SIL 2 compliance to meet strict safety standards.

FAQ

Q1: What is the main function of the KCD2-STC-EX1?
A1: It powers 2-wire SMART transmitters in hazardous areas and repeats their signals to safe-area control systems.

Q2: Does it support HART® communication?
A2: Yes, it allows bi-directional HART® signals to pass through the 4–20 mA loop.

Q3: How compact is the device?
A3: The housing width is only 12.5 mm, making it suitable for high-density DIN-rail installations.

Q4: What safety certifications does it carry?
A4: It is ATEX, IECEx, and CE certified and supports functional safety up to SIL 2.

Q5: Which industries benefit most from this module?
A5: Oil and gas, chemical processing, pharmaceutical manufacturing, and general process automation.