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The Modulebus can be expanded by using a Modulebus Optical port module on the Fieldbus
Communication Interface module and communicates via an optical cable with the Optical
Modulebus modem in the I/O cluster.
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The Optical Modulebus modems have an input for one 24 V d.c. power. The FCI provides 24V
d.c. (from the source) and an isolated 5V d.c. power to the base cluster’s I/O modules (12
maximum) by way of the ModuleBus connections. The power source can be the SD811/812
power supplies, battery, or other IEC664 Installation Category II power sources. Power status
inputs, 2 x 24 V, to monitor 1:1 redundant mains are also provided
The front plate of the Optical Modulebus modem provides LEDs for diagnostic and status
indications. One rotary switches is used for setting of the cluster address. Labels for optional user
text and item number are also provided.
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The Modulebus Optical port have connectors for optical cables and connector for connection to
the communication interface module.
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SD811 SD811 Power Supply 100-240 V a.c./185-250 V d.c.
24 V d.c. 2.5 A.
Rated isolation voltage 300 V.
SD812 SD812 Power Supply 100-240 V a.c./185-250 V d.c
24 V d.c. 5 A.
Rated isolation voltage 300 V.
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TB810 Modulebus Optical port 10 Mbit/s for Modulebus optical
expansion used together with S800 I/O and Drive equipment
Option to the Fieldbus Communication Interface.
TB811 Modulebus Optical port 5 Mbit/s for Modulebus optical expansion
used together with Drive equipments.
Option to the Fieldbus Communication Interface.
TB815 Module Bus Interconnection Unit to redundant FCIs (CI820)
TB820 Optical Modulebus modem. Optical and electrical Modulebus
interface.
Power supply 24 V
Rated isolation voltage 50 V.
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