The Pepperl+Fuchs KFD2-CRG2-Ex1.D is a single-channel isolated barrier transmitter power supply designed for intrinsic safety applications. It supplies power to 2-wire and 3-wire transmitters or can be used with current sources. The device features two relay contact outputs and an active 0/4 mA to 20 mA current source output, all of which can be integrated into safety-relevant circuits. The current output is easily scalable, and the device includes a display for indicating measured values in various physical units. Configuration is facilitated via a keypad or PACTware configuration software. The input has line fault detection, and faults are signaled by LEDs and a separate collective error message output.

Key Features:

• Intrinsic Safety: Suitable for use in hazardous areas, providing safe signal transfer to control systems.

• Versatile Input Options: Supports 2-wire and 3-wire transmitters, as well as 2-wire current sources.

• Multiple Outputs: Offers two relay contact outputs and an active current source output (0/4 mA to 20 mA).

• Configurable Alarms: Features programmable high/low alarms with adjustable energized/de-energized delay.

• Linearization Function: Supports linearization with up to 20 points for precise signal processing.

• Line Fault Detection (LFD): Continuously monitors the control circuit for lead breakage (LB) and short circuit (SC) conditions.

• Safety Compliance: Achieves up to SIL 2 according to IEC/EN 61508 and IEC/EN 61511 standards.

Technical Specifications:

• Supply Voltage: 20 to 30 V DC

• Power Consumption: Approximately 2.5 W

• Input Signal: 0/4 mA to 20 mA

• Available Voltage at Input: ≥ 15 V at 20 mA

• Open Circuit Voltage/Short-Circuit Current: 24 V / 33 mA

• Input Resistance: 45 Ω (terminals 2, 3)

• Relay Contact Outputs:

• Contact Loading: 253 V AC / 2 A / cos φ ≥ 0.7; 40 V DC / 2 A

• Mechanical Life: 5 x 10⁷ switching cycles

• Analog Output:

• Current Range: 0 to 20 mA or 4 to 20 mA

• Open Loop Voltage: Max. 24 V DC

• Load: Max. 650 Ω

• Fault Signal: Downscale I ≤ 3.6 mA, upscale I ≥ 21 mA (according to NAMUR NE43)

• Energized/De-energized Delay: 0 to 250 s, adjustable

• Accuracy: < 30 µA

• Influence of Ambient Temperature: 0.003 %/K (30 ppm)

• Operating Temperature Range: -20 to +60 °C (-4 to +140 °F)

• Degree of Protection: IP20

• Dimensions (W x H x D): 40 x 119 x 115 mm (1.6 x 4.7 x 4.5 inches)

• Weight: Approximately 300 grams

Pepperl+Fuchs - KFD2-CRG2-Ex1.D - 1-Channel Isolated Barrier Transmitter Power