Configured for analog signal conditioning and galvanic isolation, the Pepperl+Fuchs KFU8-CRG2-1.D (KFU8-CRG2-1.D Transmitter Power Supply) supplies 2-wire and 3-wire transmitters or active current sources and provides a 0/4-20 mA control-side output with two relay outputs. The unit also provides line fault detection, programmable alarms, and signal linearization.

Model Configuration

The KFU8-CRG2-1.D is a single-channel signal conditioner. The available configuration provides one analog input, two relay outputs associated with Output I and Output II, and one active analog current output. The manufacturer specifies the device for non-intrinsically-safe applications; it should not be confused with the similarly named KFU8-CRG2-Ex1.D variant.

Hardware Specifications

The electrical and mechanical values above are taken from the current Pepperl+Fuchs technical data for KFU8-CRG2-1.D.

DIN-Rail Signal Conditioning and Isolation

The KFU8-CRG2-1.D provides galvanic isolation between field circuits and control circuits. The field input accepts 2-wire and 3-wire transmitters as well as active current sources. The control-side interface provides an active 0/4 to 20 mA current output and two relay contact outputs.

The analog output can be scaled, while the LCD can display the measured value in different physical units. The device also provides programmable high and low alarms, adjustable energized/de-energized delay, and a linearization function with a maximum of 20 points.

For installation, the unit uses a 35 mm DIN mounting rail and screw-terminal connections. The specified housing dimensions are 40 x 119 x 115 mm, with a mass of 300 g and IP20 protection.

Ordering Information

• Model: KFU8-CRG2-1.D
• Product family: K-System
• Device type: Transmitter Power Supply
• Channel configuration: 1-channel signal conditioner
• Field connection: Terminals 1, 2, 3
• Control-side analog output: Terminals 8+, 7-
• Relay outputs: Output I and Output II
• Power connection: Terminals 23, 24
• Programming: Front programming interface and compatible PACTware configuration software
• Optional system components listed by the manufacturer include the K-ADP-USB programming adapter, PACTware 5.0, DTM interface technology, and K-DUCT-GY profile rail.

Field Installation Guidelines

DIN-rail mounting

• Mount the device on a 35 mm DIN mounting rail according to EN 60715.
• Allow access to the removable screw terminals and front programming interface.
• Observe the -20 to 60 deg C ambient operating range.
• The IP20 enclosure requires installation inside an appropriate protected control cabinet or enclosure.

Signal wiring

• Connect the field transmitter according to the applicable terminal assignment for terminals 1, 2, and 3.
• Verify 2-wire or 3-wire transmitter wiring before applying power.
• Check loop polarity and available transmitter voltage during commissioning.
• Keep analog signal wiring separated from high-current switching conductors where practical.

Relay and analog output wiring

• Connect Output I relay contacts to terminals 10, 11, and 12.
• Connect Output II relay contacts to terminals 16, 17, and 18.
• Connect the analog current output to terminals 8+ and 7-.
• Do not exceed the specified relay contact ratings of 250 V AC / 2 A or 40 V DC / 2 A.

Configuration

• Use the front keypad and LCD for local configuration.
• PACTware can be used with the appropriate interface technology and programming adapter.
• Verify alarm thresholds, delay settings, output scaling, and linearization parameters before placing the signal loop into service.

Delivery Information

• Delivery time: 3-5 days when payment is finished.
• Shipping: DHL, FedEx, or UPS.
• Packaging: anti-static industrial packaging with impact protection for industrial electronic equipment.

Frequently Asked Questions

Q: What type of transmitters can the KFU8-CRG2-1.D supply?
A: It supports 2-wire and 3-wire transmitters and can also be used with active current sources.

Q: What analog output signals are available?
A: The active analog output can be configured for 0 to 20 mA or 4 to 20 mA operation.

Q: Does the unit provide line fault detection?
A: Yes. The specified detection thresholds are below 0.2 mA for input line breakage and above 22 mA for input short circuit.

Q: What is the maximum relay contact rating?
A: The relay contacts are rated at 250 V AC / 2 A with cos phi >= 0.7, or 40 V DC / 2 A.

Q: Can the analog signal be linearized?
A: Yes. The device provides a linearization function with a maximum of 20 points.