ABB 5SDD1060F0001 SCR module
Jumpers and switches
Jumper / Switch Description Positions
J1 (AI1) Determines whether analog input AI1 is used as a current or
voltage input.
Current (I)
Voltage (U), default.
J2 (AI2) Determines whether analog input AI2 is used as a current or
voltage input.
Current (I)
Voltage (U), default.
J3 (D2D) Drive-to-drive link termination. Must be set to terminated
position when the thyristor power controller is the last unit on
the link.
Bus is not terminated, default.
Bus is terminated.
J4A ... J4D (encoder) OnBoard encoder interface.
J5 (AO1) Determines whether analog output AO1 is used as a
current or voltage output.
Voltage (U), default.
Current (I)
J6 (grounding) Digital ground selection switch. Determines whether DICOM is
separated from DIOGND (e.g. the common reference for
digital inputs floats).
See Ground isolation diagram .
The insulation voltage between them is 50 V.
DIOGND and DICOM separated.
DIOGND and DICOM connected,
default.
J7A, J7B OnBoard encoder interface. Encoder, default.
Not in use for DCS880.

DDCS branching unit NDBU-95
The NDBU-95 is used to implement star topology for DDCS communication. This allows a drive to fail or become
unpowered without disabling the complete communication. The NDBU-95 receives messages from the master
(e.g. PC) and sends them to all the drives simultaneously. Each drive has an individual address and only the
addressed drive sends a reply message to the master.
NDBU-95 has nine output channels. The reply message sent by a drive is delivered to the master. Several NDBU-
95s can be used in parallel, in series or in any combination of these. The maximum distance between the master
and a NDBU-95 as well as between two NDBU-95s, see manual Branching units NDBU-95.
Technical data Layout of the NDBU-95
Optical links:
Master channels1 DDCS input and 1 DDCS
output
Drive channels9 DDCS inputs and 9 DDCS
outputs
Data rate1 ... 4 Mbit/s, (see X12)
Driving current20 mA, 30 mA, 50 mA,
channel disabling, (see X2 ... X11)
MonitoringA green LED for each channel is
switched on, when messages are received
Transmission device10 Mb components
Power supply:
Input voltage+24 VDC ±10 %
Input current300 mA
MonitoringA green LED is switched on,
when the output voltage is normal
Operating temperature: +0 ... +50°C
Dimensions:See diagram
Note: Only channels with the same
hardware
components (e.g. 10 Mb component) are
allowed to be connected together.