Morningstar RELAY DRIVER Manuel D'installation, D'utilisation Et D'entretien page 56

must have a TriStar controller (other future Morningstar Devices may
also provide Meter Bus power)
An example Meter Bus network is shown in Figure 27. A TriStar
controller provides power to the Meter Bus network. Two (2) DIN rail
mounted Relay Drivers and a TriStar Remote Meter is also on the
network. It does not matter which order the devices are connected on
the Meter Bus network.
RELAY DRIVER 56 | P a g e