United Kingdom 0800 488 488 | Intl +44 (0) 161 777 6611 | Welcome to our new website, found an issue or bug? Please report it here
Model-KFD0
Loop Powered Galvanic Barrier for Safe Transmitters, DIN Rail Mount
- Designed to mount on most standard DIN rails
- Approved for use in hazardous areas
Product Overview
- Applications Fluid Measurement and Control, Industrial and Manufacturing
- Capacitance FM: 0.042 µF, 0.267 µF, 0.267 µF
- Certifications IIA (D, F, G), IIB (C), IIC (A, B)
- Current Output 38.2 mA
- Inductance FM: 0.5 mH, 2.5 mH, 2.5 mH
- Input Control Signal 21 to 35 Vdc
- Operating Temperature, Max 140 °F
- Operating Temperature, Min -4 °F
- Output Detail 4 to 20 mA
- Output Signal Current
- Power Consumption 150 mW
- Response Time ≤ 20 µs
- Response Time Note ≤ 20 µs at 0, and ≤ 600 µs at 800 load
- Series ID Model-KFD0
- Temperature Drift ≤ 0.5 µA/°C
- Voltage Output 23.1 V
- Weight 4.2 oz
Supported Applications
The Dwyer Model KFD0 is a loop-powered galvanic barrier designed to provide complete isolation for communication with intrinsically safe transmitters approved for use in hazardous areas. The series is specifically used to isolate voltages for HHT series applications, eliminating the need for a high integrity earth ground required by shunt type diode safety barriers.
Operating Conditions & Performance
The Model KFD0 operates within an ambient temperature range of -4 to 140°F (-20 to 60°C) with a specified temperature drift of ≤ 0.5 µA/°C. It is designed for loop-powered operation, requiring no external power supply.
- Signal Range: Hazardous area input supports 4-20 mA (linear transmission 1-22 mA); safe area output provides a 4-20 mA signal range with transmitter voltage ≤ 30 VDC.
- Voltage Requirements: Available transmitter voltage is ≥ 16 V for supply voltages > 21 V; the model supports up to 23.1 V (Vo) and 38.2 mA (Io).
- Response Time: ≤ 20 µs at 0 load, and ≤ 600 µs at 800 load.
- Power Dissipation: Maximum power dissipation is 150 mW @ 20 mA and V <24 V.
Configuration Options
The series supports DIN rail mounting on most standard rails. The physical dimensions are a height of 4-3/8 [111.20], width of 4-37/64 [116.46], and depth of 25/32 [20.00].
- Approvals: CE, FM APPROVED (Class I, Zone 1, Groups IIC, IIB, IIA; Class I, II, III, Div. 2, Groups A, B, C, D, F, G).
- Hazardous Area Parameters: Configured for Group IIC (A, B), IIB (C), and IIA (D, F, G) with capacitance values of 0.042 µF, 0.267 µF, or 0.267 µF and inductance values of 0.5 mH, 2.5 mH, or 2.5 mH.
- Accessories: Aluminum DIN rail (Model A-360) is available for mounting support.
Key Product Differences
The primary configuration in the series is Model KFD0-SCS-EX1.55, described as a loop-powered galvanic barrier compatible with Dwyer Series HHT-IX transmitters. This model provides specific electrical limits for hazardous area isolation without requiring external power.
PDFs & Manuals
