ABB BCU-02 Hardware Manual page 13

Description
I/O connector
XAI Analog input
XAO Analog output
XDI Digital input and digital start interlock
XDIO Digital input/output
XD2D Drive-to-drive link
XD24 +24 V output for digital input
XPOW External power input
XRO1 Relay output 1
XRO2 Relay output 2
XRO3 Relay output 3
XSTO Safe torque off connection (input signal).
Note: This input only acts as a true Safe torque off input in control units controlling a motor.
In other applications (such as a supply or brake unit), de-energizing the IN1 and/or IN2
terminal will stop the unit but does not constitute a true safety function.
For more information on Safe torque off, see the applicable converter hardware manual.
XSTO OUT Safe torque off connection (output for powering XSTO input of inverter modules).
X485 Not in use
Switch
AI1 Analog input 1 current/voltage selection
AI2 Analog input 2 current/voltage selection
D2D TERM Drive-to-drive link termination
DICOM = Determines whether DICOM is separated from DIOGND (ie, common reference for digital
DIOGND inputs floats).
Fiber optic connector
V1T...V12T, Fiber optic connector to converter module: T = Transmitter, R = Receiver
V1R...V12R
Connector for optional module
SLOT 1 F-type adapter, interface and I/O extension modules
If FDPI-02 diagnostics and panel interface is used, it has to be installed in slot 1 with two
screws.
SLOT 2 F-type adapter, interface and I/O extension modules
SLOT 3 F-type adapter, interface and I/O extension modules, FSO-xx safety functions module
SLOT 4 RDCO-0x DDCS communication option modules
Safety option connector
X12 Cable connector for the FSO-xx safety functions module.
Note: The FSO-xx safety functions module can be used only with ACS880 inverters.
For more information on the FSO-xx safety functions module, see the applicable FSO-xx
safety functions module user's manual.
Control panel and Ethernet connector
XETH Ethernet port, not in use
X13 Control panel
Memory unit and card connector
X205 Converter memory unit connector
MEMORY
UNIT
SD CARD Secure digital card holder (Data logger memory for the fiber optic links)
Hardware description 13