SFN4D-DC24V Panasonic, SFN4D-DC24V Datasheet - Page 7

General Purpose / Industrial Relays Safety Relay 24VDC 4 Form A 2 Form B

SFN4D-DC24V

Manufacturer Part Number
SFN4D-DC24V
Description
General Purpose / Industrial Relays Safety Relay 24VDC 4 Form A 2 Form B
Manufacturer
Panasonic
Datasheet
1.SFN4D-DC36V.pdf (8 pages)

Specifications of SFN4D-DC24V

Contact Form
4 - NO, 2 - NC
Coil Voltage
24 VDC
Contact Termination
Through Hole
Mounting Style
PCB
Power Consumption
390 mW
Contact Material
Silver Tin Oxide
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Failure modes, application examples
ds_61408_0000_en_sfn4d: 141106D
1) Feedback loop, 2) Self-holding circuit, 3) Safety circuit, 4) Auxilliary contacts
1. Self-holding circuit, three safety circuits
K1
K2
K1
K2
K1
K2
6
5
5
6
1)
(see wiring example, p. 8)
(see wiring example, p. 8)
6
5
5
6
5
6
6
5
1)
2.1. Four safety circuits
2.2. Two safety circuits
1)
7
8
13
14
2)
14
13
8
7
8
7
3) 3)
14
13
2)
10
3)
12
10
11
12
9
11
9
10
12
11
9
3)
10
12
11
12
11
10
9
3)
9
12
11
10
9
3)
3)
14
13
14
13
8
7
3)
8
7
13
14
8
7
16
15
15
16
3)
16
15
15
16
4)
4)
15
16
15
16
4)
One contact welded, e.g. NO 12-11 of K2.
One contact welded, e.g. NO 12-11 of K2.
A safety circuit needs two paths in this
failure mode. The contacts 9-10, 12-11,
and 14-13 of K1 interrupt the load.
A safety circuit needs two paths in this
failure mode. The contacts 7-8, 12-11,
and 14-13 of K1 interrupt the load.
One contact welded, e.g. NO 9-10 of K1.
One contact welded, e.g. NO 9-10 of K1.
Both contacts of one path are welded,
Both contacts of one path are welded,
e.g. NO 9-10 and NO 12-11.
e.g. NO 7-8 and NO 14-13.
Condition of contacts at deenergized coil
Condition of contacts at deenergized coil
Condition of contacts at deenergized coil
Condition of contacts at deenergized coil
Condition of contacts at deenergized coil
Condition of contacts at deenergized coil
K1
K2
K1
K2
5
6
5
5
6
6
6
5
K1
K2
K1
K2
K1
K2
K1
K2
7
8
7
8
5
6
6
5
6
5
5
6
6
5
5
6
6
5
5
6
14
13
14
13
14
13
14
13
14
13
14
8
13
8
7
7
8
8
7
7
10
10
12
12
11
11
10
9
10
12
9
10
12
11
10
11
9
12
12
9
11
11
9
9
10
12
11
12
11
10
12
11
10
9
12
11
10
9
10
12
11
12
11
10
9
9
9
9
13
13
14
14
14
13
14
13
8
7
8
7
14
13
14
13
8
7
8
7
8
7
8
7
15
15
16
16
16
15
15
16
16
15
15
16
16
15
SFN4D
16
15
15
16
15
16
15
16
15
16
7