ABB AG RTU560 / RTU211

Remote Terminal Unit

Data Sheet
Analog Input 23AI60

Application
The 23AI60 board records up to six analog meas- The internal high resolution allows it to scan all
ured values. The 23AI60 board allows it to con- measuring ranges (exception: ±2.5 mA DC (10 bit
nect all typical measured value ranges. +sign)) with the same resolution (11 bit + sign) on
one board. Two additional channels are used for
It can be configured for the following measure-
automatic zero calibration.
ment ranges:
 0 … 2.5 mA ± 2.5 mA
 0 … 5,0 mA ± 5.0 mA
 0 … 10 mA ± 10 mA
 0 … 20 mA ± 20 mA
 4 … 20 mA
 0 … 1.0 V DC ± 1.0 V DC
 0 ... 10 V DC ± 10 V DC
Other effective ranges become generated out of
these ranges through conversion of the communi-
cation unit CMU.
Fig. 1: Block diagram
Analog input board 23AI60
Characteristics
Basic checks and computing intensive, cyclical
processing functions will already be done on the Please note:
board and remove therefore the burden from the Using the voltage input channels, it is necessary
central unit. Relevant changes transmit the board to make changes on the board.
as event via the peripheral bus.
The 6 differential inputs are not potentially isolated
against the RTU560 power supply.
Unipolar or bipolar values resolve the 23AI60 into
2048 steps (11 bit plus sign) for 100 % of the
measuring signal.
The differential inputs are protected against static
and dynamic over-voltages by a protection circuit.
A low-pass filter suppresses non line frequency ac
disturbance.

Doc-No.: 1KGT 150 656 V001 1 1

ABB AG
Data Sheet Analog Input 23AI60 RTU560 / RTU211

The analog input board 23AI60 can carry out the configured measured values within the conversion
following processing functions on the measured time. Furthermore the micro controller is respon-
values: sible for interactive communication with the RTU
system bus. All configuration characteristics and
 Zero point monitoring
processing parameters are downloaded from the
 Switching recognition CMU via the RTU system bus.
 Smoothing
During initialization and operation the board car-
 Threshold value monitoring on absolute ries out a number of tests. If a fault occurs it is re-
value or with accumulation and periodic ported to the CMU. All fault conditions impairing
background transmission. the function of the board are displayed as com-
 Limit value supervision (RTU211 only) mon fault signal with a light emitting diode (Error).
A failure of the board is detected by the CMU.
Measuring range and line frequency are easily to
configure by the configuration tool. The micro con- The board has a serial connection to the RTU211
troller needs these configurations parameters to peripheral bus (Wired OR-Bus). Using the Ana-
setup the AD-converter. logue Input Board 23AI60 in a RTU560 (A, C, D)
configuration, it is necessary to add one I/O adap-
tor board 23AD64 at the beginning of the Wired
OR-Bus.
Conversion period
Scan cycle per
Line frequency [Hz] per channel
board [ms]
[ms]

60 50,0 400
50 60,0 480
16 2/3 200 1600

The micro controller controls the A/D converter

and executes all of the processing functions of the

2 Doc.–No.: 1KGT 150 656 V001 1

 ABB AG
RTU560 / RTU211 Data Sheet Analog Input 23AI60

Technical Data
In addition to the RTU560/RTU211 general tech- Connection Type
nical data, the following applies:
Connector: Removable screw
Input channels terminals
Inputs 6 differential inputs
Electromagnetic Compatibility
Measuring ± 2,5 mA
Electrostatic dis- 4 kV Contact
ranges ± 5,0 mA
± 10 mA charge Immunity 8 kV Air
± 20 mA IEC 61000-4-2
(level 3) Performance criteria A
± 1,0 V DC
± 10 V DC
Radiated Radio- 10 V/m
Shunt / impedance 50 Ω at 2,5 … 20 mA Frequency Elec-
tromagnetic Field Performance criteria A
Immunity Test
Continuous load max. 50 mA
IEC 61000-4-3
without destruction for 1 minute
(level 3)
AD Converter 12 bit + sign
Immunity to Elec- 2 kV
resolution
trical Fast Tran-
sient Performance criteria A
Resolution: 11 bit plus sign for all IEC 61000-4-4
ranges except: (level 3)
10 bit plus sign at 2,5 mA
Surge Immunity 2 kV
Common mode Absolute maximum rating Test
voltage ± 150 V DC. IEC 61000-4-5 Performance criteria A
Common mode rejection (level 3)
85 db
Power Supply rejection
Immunity to Con- 10 V
75 db
ducted Distur-
bances, induced Performance criteria A
Line frequency 16.6, 50 or 60 Hz by Radio-
Frequency
Accuracy 0.25 % (DIN 43782) IEC 61000-4-6
0.5 % at ± 2.5 mA (level 3)

Current Consumption Environmental Conditions

5 Volt 25 mA Temperature: -25 ... 70 C
15 Volt 10 mA
Relative humidity: 5 ... 95 %
18 Volt - (non condensing)
24 Volt -
Ordering Information
Mechanical Layout
23AI60 R0001 1KGT 014 700 R0001
Length 70.0 mm

Width 107.5 mm

Height 20.0 mm

Doc.-No. 1KGT 150 656 V001 1 3

ABB AG
Data Sheet Analog Input 23AI60 RTU560 / RTU211

ABB AG
Power Technologies Division
Power Technology Systems

Kallstadter Str. 1, D-68309 Mannheim

Telefon +49 (0) 621 381 - 7592
Telefax +49 (0) 621 381 - 7622
www.abb.com Subject to alteration

4 Doc.–No.: 1KGT 150 656 V001 1