HCPL-7710-000E Datasheet, PDF (13/18 Pages) AVAGO TECHNOLOGIES LIMITED – 40 ns Propagation Delay, CMOS Optocoupler

AC LINE
NODE/APP SPECIFIC
uP/CAN
HCPL
x710
HCPL
x710
TRANSCEIVER
LOCAL
NODE
SUPPLY
5 V REG.
GALVANIC
ISOLATION
BOUNDARY
DRAIN/SHIELD
SIGNAL
POWER
NETWORK
POWER
SUPPLY
Figure 18. Typical DeviceNet node.
V+ (SIGNAL)
V– (SIGNAL)
V+ (POWER)
V– (POWER)
Implementing DeviceNet and SDS with the HCPL‑x710
HCPL-0710 fig 17
With transmission rates up to 1 Mbit/s, both DeviceNet
and SDS are based upon the same broadcast-oriented,
communica­tions protocol — the Controller Area
Network (CAN). Three types of isolated nodes are rec-
ommended for use on these networks: Isolated Node
Powered by the Network (Figure 19), Isolated Node
with Transceiver Powered by the Network (Figure 20),
and Isolated Node Providing Power to the Network
(Figure 21).
Isolated Node Powered by the Network
This type of node is very flexible and as can be seen in
Figure 19, is regarded as “isolated” because not all of its
components have the same ground reference. Yet, all
compo­nents are still powered by the network. This node
contains two regulators: one is isolated and powers the
CAN controller, node-specific application and isolated
(node) side of the two optocoup­lers while the other is
non-isolated. The non-isolated regulator supplies the
transceiver and the non-isolated (network) half of the
two optocouplers.
NODE/APP SPECIFIC
uP/CAN
HCPL
x710
HCPL
x710
TRANSCEIVER
REG.
ISOLATED
SWITCHING
POWER
SUPPLY
GALVANIC
ISOLATION
BOUNDARY
DRAIN/SHIELD
SIGNAL
POWER
NETWORK
POWER
SUPPLY
Figure 19. Isolated node powered by the network.
13
HCPL-0710 fig 18
V+ (SIGNAL)
V– (SIGNAL)
V+ (POWER)
V– (POWER)