Description
XAI Analog inputs
XAO Analog outputs
XDI Digital inputs, Digital input interlock (DIIL)
XDIO Digital input/outputs
XD2D Drive-to-drive link
XD24 +24 V output (for digital inputs)
XETH Ethernet port
XPOW External power input
XRO1 Relay output RO1
XRO2 Relay output RO2
XRO3 Relay output RO3
XSTO Safe torque off connection (input signals)
XSTO OUT Safe torque off connection (to inverter modules)
X12 (On the opposite side) Connection for FSO-xx
safety functions module in inverter modules. Not
in use in supply modules.
X13 Control panel connection
X485 Not in use
V1T/V1R,
V2T/V2R
Fiber optic connection to modules 1 and 2
(VxT = transmitter, VxR = receiver)
V3T/V3R
…
V7T/V7R
Fiber optic connection to modules 3…7
(BCU-12/22 only)
(VxT = transmitter, VxR = receiver)
V8T/V8R
…
V12T/V12R
Fiber optic connection to modules 8…12
(BCU-22 only)
(VxT = transmitter, VxR = receiver)
SD CARD Data logger memory card for supply / inverter
module communication
BATT OK Real-time clock battery voltage is higher than
2.8 V. If the LED is off when the control unit is
powered, replace the battery.
FAULT The control program has generated a fault. See
the appropriate firmware manual.
PWR OK Internal voltage supply is OK
WRITE Writing to memory card in progress. Do not
remove the memory card.
XDI
XSTO
X485
XD2D
XRO1
XRO2
XRO3
XDIO
XD24
XSTO
OUT
XAI
XAO
XPOW
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