HCPL-0710500 Agilent(Hewlett-Packard), HCPL-0710500 Datasheet - Page 13

• Manufacturer Part Number: HCPL-0710500
• Description: 40 ns Prop. Delay/ SO-8 Optocoupler
• Manufacturer: Agilent(Hewlett-Packard)

DRAIN/SHIELD
Isolated Node Providing
Power to the Network
Figure 20 shows a node providing
power to the network. The AC line
powers a regulator which
provides five (5) volts locally. The
AC line also powers a 24 volt
isolated supply, which powers the
network, and another five-volt
Figure 20. Isolated Node Providing Power to the Network.
SIGNAL
POWER
DEVICENET NODE
NODE/APP SPECIFIC
HCPL
0710
TRANSCEIVER
uP/CAN
HCPL
0710
regulator, which, in turn, powers
the transceiver and isolated
(network) side of the two
optocouplers. This method is
recommended when there are a
limited number of devices on the
network that don’t require much
power, thus eliminating the need
for separate power supplies.
5 V REG.
5 V REG.
SWITCHING
ISOLATED
SUPPLY
POWER
AC LINE
V+ (SIGNAL)
V– (SIGNAL)
V+ (POWER)
V– (POWER)
GALVANIC
ISOLATION
BOUNDARY
More importantly, the unique
“dual-inverting” design of the
HCPL-0710 ensures the network
will not “lock-up” if either AC line
power to the node is lost or the
node powered-off. Specifically,
when input power (V
HCPL-0710 located in the
transmit path is eliminated, a
RECESSIVE bus state is ensured
as the HCPL-0710 output voltage
(V
O
) goes HIGH.
DD1
) to the