ABB S800 I/O User Manual page 63

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Information regarding location of equipment may be found in the documentation
delivered with the equipment. Some general I/O Station information is presented
below.
Install a DIN-rail sized to allow installation of the FCI, ModuleBus Modem,
MTUs, terminator and power supplies. Some extra DIN-rail should be allowed
for expansion or the moving of the FCI, ModuleBus Modem or MTUs during
maintenance.
Install the FCI, ModuleBus Modem on the left end of the DIN-rail leaving
some room to the left to allow removable from the first MTU. If vertical
mounting is used, leave room to the top of the FCI for removal.
Install the first MTU to the right (below) of the FCI or ModuleBus Modem and
all other MTUs to the right (below) of the preceding MTU.
The last MTU (12 max.) connected to the FCI or ModuleBus Modem will have
the TB807 Terminator installed in the ModuleBus connector.
Set each MTU mechanical keys to the correct setting for the I/O module that
will be located there.
The power supply modules may be located on the same DIN-rail as the FCI or
ModuleBus Modem and the I/O modules, but should be always located on a
horizontal DIN-rail because of its weight.
Install an end stop before the first module and after the last one on the DIN-rail.
Then proceed with the electrical connections as necessary.
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The AF100 Fieldbus is connected to the terminals of a CI810 or a CI820.
The incoming fieldbus twisted pair cable is connected to a plug connector with four
terminals, two for the signal wires and two for the shield. The incoming and out
going fieldbus signal + conductors are terminated in the + terminal.
The - conductors are both terminated in the - terminal. The cable shield drain wires
3BSE 020 923R101
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53

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