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UM_MOST150_Repeater_V01_00_XX-1.pdf
Page 12
2.3 Functional Description
The MOST150 Repeater has two interfaces that act slightly different: The main ring to be connected to the
timing master and the extension ring.
After powering, the MOST150 Repeater switches into stand-by mode having a low power consumption
less than 30 µA. Both Lock LEDs remain dark. As soon as the MOST150 Repeater detects light on an
interface the corresponding LED lights red but switches immediately to green if the interface detects also
lock. The LED of the other interface remains dark.
If the interface on the main ring detects light the MOST network is closed by default. If the interface of the
extension ring detects stable lock it takes up to 300 ms until the extension ring is included in the MOST
network. If the extension is deconnected it takes about 10 ms to close the main ring.
The MOST150 Repeater also supports slave wake-up. This means, the extension ring is able to wake-up
the main ring being in sleep mode (power consumption less than 30 µA) after stable lock has been
detected on the extension’s side.
In case the MOST150 Repeater detects no light it switches back to sleep mode after 2000 ms.
The MOST150 Repeater provides a relay contact allowing to loop an external provided power signal
through the closed relay contact. The relay contact, which is short circuit protected, closes if light is
detected either on the main ring or on the extension ring side. The power signal can be used for powering
an external device e.g., for data logging or storage. Thus it is possible to log all data of the MOST network.
If the power signal exceeds the maximum values for current (1 A) the relay drops out. Before the relay con-
tact can be reused the MOST Repeater has to be switched off and on again.