ABB ACS880-1604LC, Hardware Manual

Page: 23 / 200

￭ 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 module.
Note:
With 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.
Note:
The Safe torque off (STO) safety function is only implemented in inverter units. Therefore,
the STO function can not be used in supply, brake and converter units. In supply, brake and
converter units, de-energizing any connection of STO IN (X52) connector stops the unit.
Note that this stop in supply or brake module is not safety related and must not be used for
safety function purposes.
The “24V” inputs on X52 must be connected to +24 V (on connector X53, for example) on
each module. On a new module, a jumper wire set installed at the factory makes this
connection.
Operation principle and hardware description 23