HCPL4200 Datasheet, PDF (12/12 Pages) Agilent(Hewlett-Packard) – Optically Coupled 20 mA Current Loop Receiver

differences and reduction of
power supply requirements. With
this combination of HCPL-4100/
-4200 optocouplers, specific
current loop noise immunity is
provided, i.e., minimum SPACE
state current noise immunity is 1
mA, MARK state noise immunity
is 8 mA.
Voltage compliance of the current
source must be of an adequate
level for operating all units in the
loop while not exceeding 27 V dc,
the maximum breakdown voltage
for the HCPL-4100. Note that the
HCPL-4100 transmitter will allow
loop current to conduct when
input V_CC power is off. Consult
the HCPL-4100 transmitter
optocoupler data sheet for
specified device performance.
For more information about the
HCPL-4100/-4200 optocouplers,
consult Application Note 1018.
Figure 22. Half Duplex Current Loop System Configurations for
(a) Point-to-Point, (b) Multidrop.
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