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Control Unit
UCU-26
ABB UCU-26 User Manual
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UCU-22…26
ground
isolation
diagram
Power
supply
ground
XPOW
XA
I
XA
O
XD2D
X485
X
CAN
XETH
1
XETH
2
XETH
3
XETH
4
XP
A
N
XR
O1-XR
O
4
NC
1
1
1
COM1
1
2
NO1
1
3
…
NC
4
4
1
COM4
4
2
NO4
4
3
XD24
+
24V
D
5
DI
COM
6
+
24V
D
7
DI
OGN
D
8
XD
IO
DI
O1
1
DI
O2
2
DI
OGN
D
3
DI
OGN
D
4
XD
I
DI
1
1
DI
2
2
DI
3
3
DI
4
4
DI
5
5
DI
6
6
D
IIL
7
XST
O
XST
O
OU
T
*
**
*The
maximum
common
mode
voltage
between
each
AI
input
and
AGND
is
±30
V
**Ground
selector
(DICOM=DIOGND)
settings
DICOM=DIOGND:
ON
All
digital
inputs
share
a
common
ground
(DICOM
connected
to
DIOGND).
This
is
the
default
setting.
DICOM=DIOGND:
OFF
Ground
of
digital
inputs
DI1…DI5
and
DIIL
(DICOM)
is
isolated
from
DIO
signal
ground
(DIOGND).
Isolation
voltage
50
V.
30
Technical
data
29
31
Table of Contents
Table of Contents
5
Introduction to the Manual
7
Contents of this Chapter
7
Safety
7
Terms and Abbreviations
7
Related Documents
8
Operation Principle and Hardware Description
9
Contents of this Chapter
9
Hardware Description
9
Fiber Optic Connections
10
Layout
11
Mechanical Installation
15
Contents of this Chapter
15
Examining the Delivery
15
Identifying Different Control Unit Types
15
Installing the Control Unit on a DIN Rail
16
Installing the Slot Adapter
18
Electrical Installation
19
Contents of this Chapter
19
Installation Procedure
19
Related Documents
19
Maintenance
21
Contents of this Chapter
21
Replacing the Real-Time Clock Battery
22
Replacing the Memory Unit
23
Replacing the Microsdhc Memory Card
24
Replacing the Control Unit
25
Technical Data
27
Contents of this Chapter
27
Connector Data
27
Ucu-22
30
Additional Information on the Connections
31
External Power Supply for the Control Unit (XPOW)
31
DIIL Input
31
The XD2D Connector
31
The X485 Connector
32
Microsdhc Memory Card Slot
32
Other Information
33
Cyber Security Disclaimer
34
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ABB UCU-26 Specifications
General
Brand
ABB
Model
UCU-26
Category
Control Unit
Language
English
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