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MODEL KFD0
A
A
GALVANIC BARRIER
Loop Powered, Intrinsically Safe Isolators
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The Model KFD0 Galvanic Barrier provides complete isolation for communication
with Dwyer® intrinsically safe transmitters approved for use in hazardous areas. This
galvanic barrier eliminates the need for a high integrity earth ground required when
using shunt type diode type safety barriers. Unlike most other isolators, the Model
KFD0-SCSEX1.55 does not require external power and has a low current draw.
BENEFITS/FEATURES
• Designed to mount on most standard DIN rails
• Approved for use in hazardous areas
APPLICATIONS
• Used to isolate voltages for intrinsically safe applications for HHT series
MODEL CHART
Model Description Approval Dwyer Series Vo (V) Io (mA) Group µF mH
KFD0-SCS-EX1.55 Loop powered
galvanic barrier
FM for class I, zone 1, groups IIC, IIB, IIA;
class I, II, III, div. 2, groups A, B, C, D, F, G
SPECIFICATIONS
Hazardous Area Input: Signal range:
4-20 mA (linear transmission 1-22 mA);
Available transmitter voltage: ≥ 16 V for
supply voltage > 21 V.
Safe Area Output: Signal range: 4-20
mA; Transmitter voltage: ≤ 30 VDC.
Response Time: ≤ 20 µs at 0, and ≤ 600
µs at 800 load.
ACCESSORIES
Model Description
A-360 Aluminum DIN rail 1 m
HHT-IX 23.1 38.2 IIC (A, B), IIB (C), IIA
(D, F, G)
Maximum Power Dissipation: 150 mW
@ 20 mA and V <24 V.
Temperature Limits: -4 to 140°F (-20
to 60°C).
Temperature Drift: ≤ 0.5 µA/°C.
Weight: 4.2 oz (120 g).
Compliance: CE, FM.
0.042, 0.267,
0.267
0.5, 2.5, 2.5
DWYER INSTRUMENTS, LLC | dwyer-inst.com366
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