In the master mode, both emitters send data to downstream local units, while receiving data on the detectors. In the local mode, data from detector 1 is delivered to receive data of the RS-232 port of the unit and is relayed downstream to another local unit via emitter 2. In the local mode, data from further downstream arriving on detector 2 is passed upstream over emitter 1, along with transmit data form the RS-232 interface. The FOM2 operates over low cost 850 nm fiber optic cable. The FOM2 optional internal battery powers the emitters and detectors to insure data passthrough during power outages when daisy chaining in multi-drop mode.
Battery life is determined by the amount of data transmitted.
Implemented via DIP switch. Operational Modes Master mode Emitters 1 and 2 operate in parallel, sending data downstream from the RS-232 interface. Detectors 1 and 2 are logically OR'd back to the RS-232 interface. Local Mode, Daisy chain Data comes in on fiber detector 1, passed on downstream on emitter 2 and is presented on the RS-232 interface. Data coming upstream to the unit on detector 2 is passed upstream on emitter 2.