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WARNING!
For a reliable connection, the end of the pipe entering the connector must be
completely intact for a length of at least 5 cm (2"). Make sure the pipe is perfectly
round where it enters the connector, and not deformed eg. by any bends nearby.
The piping must not exert any tension or torque on the connector.
Connectors X50...X59
R8i modules contain a power supply (BDPS) that provides 24 V DC for the circuit boards
of the module. The 24 V DC voltage provided by the BDPS is also available on X53, and
can be used to power the BCU control unit of a single R8i inverter module.
Note: With an inverter unit consisting of parallel-connected R8i modules, it is strongly
recommended to use an external 24 V DC supply to power the BCU control unit.
The BDPS is powered internally from the DC link. An auxiliary voltage of 230 V AC or 115
V AC (selectable) can optionally be fed to terminal block X50 to power the BDPS even when
the DC link is not live. The selection between 115 V and 230 V is made with selector plug
X59. The setting can be changed by removing the two screws, turning the plug 180 degrees,
and reinstalling the screws.
If the Safe torque off (STO) function is not used, the "24V" inputs on X52 must be connected
to +24 V (on connector X53, for example) on each inverter module. On a new module, a
jumper wire set installed at the factory makes this connection.
If the STO function is to be implemented, the jumper wire set must be removed – a
mechanical interlocking device is factory-installed on connectors X51 and X52 to this effect.
For STO, X52 (STO IN) is wired to the STO OUT connector on the BCU control unit.
Connector X51 on the module is wired to connector X52 on the next module (if present).
For details, see chapter The Safe torque off function.
Operation principle and hardware description 19
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