
Pin assignment of the solid-state overload relay for IO-Link
The following pin assignments apply for the solid-state overload relay for IO-Link with screw-
type terminals or spring-loaded terminals.
Table 9-3
Pin assignment of the solid-state overload relay for IO-Link
Marking
Meaning
Image
L+
Supply voltage IO-Link/24 V DC
Connection for IO-Link master/
supply voltage (ES1/PELV) 24 V DC
OVERLOAD
RESET
MAN
AUTO
Y1
T1
CLASS/I
MAX
I(-)
T2
I(+)
L+
SIRIUS
DEVICE /
IO-LINK
GND FAULT
THERMISTOR
3RB2483-4AA1
G/JJMMTT
*Exx*
10
20
30
40
50
60
70
80
90
100
15
x I
MAX
%
20
10
5
30
20
10
5
30
20
10
5
30
10
5
30
20
1 0
0 A
1 0
0 0
A
A
0
1
1 A
TEST/
RESET
Y2
e
C/Q
L-
96
98
95
96
95
98
Q1
Q2
5
$
$R
QO\
C/Q
Communication signal IO-Link
L-
Chassis ground IO-Link/24 V DC
T2
Thermistor input
I(-)
Analog output
Y2
Remote reset
T1
Thermistor input
I(+)
Analog output
Y1
Remote reset
96
Changeover contact Q2 - NC contact
4
4
95
Switching contact Q1 - NO contact
1)
98
Changeover contact Q2 - NO contact
1)
Q1 is responsible for the ON and OFF function of the changeover unit. Q2 is responsible for the actual changeover function.
Note
Connection of the main circuit is shown in the operating instructions of the current measuring
module. You can find more information in Chapter "References (Page 126)"
Terminal labels and notes on the protection of device connections
L+
24 V DC supply volt‐
age
You can find the technical specifications of the product 3RB24 in the Siemens Industry Online
Support (
https://support.industry.siemens.com/cs/ww/en/ps/16281/td
).
L-
Ground 24 V DC
L+
Connection for IO-
Link Master
No additional measures are required for short-circuit protection.
C/Q
L-
T2
Thermistor input
No additional measures are required for short-circuit protection.
I(-)
Analog output
No additional measures are required for short-circuit protection.
Y2
Remote reset
T1
Thermistor input
No additional measures are required for short-circuit protection.
I(+)
Analog output
No additional measures are required for short-circuit protection.
Y1
Remote reset
Connecting
9.3 Connecting the solid-state overload relay for IO-Link
SIRIUS 3RB24 electronic overload relay for IO-Link
Equipment Manual, 07/2022, NEB969165602000/RS-AA/003
79