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L E A R
P
A T H
M C / S D
U
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M
A N U A L
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E V
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3 . 0 9
5 8
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EKNIC
,
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NC
. T
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.
(585)
784-7454
•
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HLFB
A
PPLICATION
E
XAMPLES
HLFB Driving a LED
The HLFB circuit is not internally powered; it requires an external 5–
24VDC power supply capable of sourcing/sinking at least 1mA, non-
inductive. In typical HLFB applications, power is supplied by the PLC,
control board, or an external supply. See Appendix D for complete HLFB
specifications.
(User Circuit)
HLFB
+
HLFB
-
Current
Limiter
ClearPath Internal
1
5
5-24VDC
HLFB Driving LED
HLFB Driving a Brake Via Solid State Relay
ClearPath's HLFB output circuit can directly drive the input of some solid
state relays (SSRs) such as the
Crydom DC60S3
shown below.
Using the
Servo On
HLFB mode, ClearPath can indirectly control power
to devices such as a 24V "power-off" brake. See sketch below for example
wiring details.