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General
AF-contactors are fitted with an electronic interface.
Code-11...-14, optimized for wide voltage range and stability
Operation is done, as with conventional contactors, by applying and removing supply votlage on
A1 and A2. Closing when 80% above the lower nominal voltage limit, opening when below 55% of
the lower nominal voltage limit, which is indicated in the functional diagram.
Code-42 and -43, optimized for short operation times
Operation is done, as with conventional contactors, by applying and removing supply voltage
on A1 and A2. Closing when 80% above the lower nominal voltage limit, opening when below
20% of the upper nominal voltage limit. Undefined function between the limits.
Code-31...-34 built-in PLC interface
Operation is controlled by separate logic control signals from for instance a PLC. Use of logic
control requires a steady supply voltage on A1 and A2 within the rated voltage range, as described
for code-11...-14- The function of the logic control signal will no longer be guaranteed when the
supply voltage on A1 and A2 is removed.
The logic control signals are operated with 24V d.c. There are two control signals (ON and OFF_N)
and a common reference (COM). For the control signals, the function is guaranteed from 15V d.c.
(6mA) to 33V d.c. (20mA).
The contactor is closed by a control signal ON and opened by removal of control signal from
OFF_N. The functions are described in the diagram below. "1" means 24V d.c. between the control
signal and COM. "0" means no voltage between the control signal and COM. Minimum control
signal pulse length for opening and closing is 10ms. To connect the PLC interface use cable
dimension of max 1.5mm²
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ABB Electrification Sweden AB
SE-721 61 Västerås
Sweden
abb.com/lowvoltage
1
ON
0
1
OFF_N
0
High
A1/A2
Voltage
Low
Closed
Position
Open
ON OFF_N COM
5
1
2
3
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Further information:
Position
Contactor
closed
Contactor
open
+24 V
Start
Stop
Note: Emergency stop should disconnect A1 and A2
When used with switches the wiring can be done
according to diagram above.
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Revision
AC
Revision date
2023-03-01
Document number
1SFC100003M0201
Functional diagram
Supply
voltage
Low
High
(A1/A2)
Normal range
Operational range
80% of lower voltage range level
55% of lower voltage range level
Supply voltage
A1
A2
Contactor
X5
ON
1
OFF_N
2
COM
3
Relay
95
96
0V
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2023
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