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2.4 OIU
Fig.2.4 OIU
OIU (Option Interface Unit) is the junction box for connecting external options and BDE.
OIU consists of OIB (Option Interface Board) and TB (Terminal Board).
And OIU has below external connectors and terminals.
・ 4 Ethernet ports
・ 4 (2-wire) analogue telephone/FAX terminals
・ Maximum 4 external buzzers, and maximum 2 external button connecting terminals
・ External GPS input terminal
・ NMEA output terminal (for VDR)
・ +24VDC power input terminal
With BDE, below signals(cables) are connected.
・ +24VDC power supply
・ Signal control cable
・ Ethernet cable
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