Product data

20
MeterBusTM Networking
3.3.3 Example #3 - RD-1 Polling Network
A Relay Driver used in conjunction with a Meter Hub allows the Relay Driver to poll multiple
controllersandtriggeralarmsbaseduponspeciccontrollerinputs.Forexample,theRD-1could
trigger an alarm for overcurrent on one of the controllers, while simultaneously triggering an
alarm for LVD on one of the other controllers. Note that the Relay Driver is connected to Output
Power Port A because it does not supply its own power to the MeterBus
TM
network.
Figure 19. Morningstar MeterBus
TM
RD-1 Polling Network Diagram
3.3.4 Example #4 - Large, Multiple Hub Network 1
Figure 20 illustrates a large MeterBus
TM
network making use of multiple Meter Hubs. The two
hubs are linked using the Link Out / Link In Ports A & B, respectively. Each hub expands the
number of MeterBus
TM
connections to the network. Notice that the TriStar powering the hubs
can only accommodate a maximum of three (labeled 1-3) devices that require power (two hubs
and one TS Remote Meter in the diagram below). Remember: A maximum of four Hubs may be
linked on one MeterBus
TM
network, accommodating up to 15 MeterBus
TM
devices. Regardless of
how many Hubs are used, all networking rules concerning power management still apply.