SFN4D-DC5V PANASONIC EW, SFN4D-DC5V Datasheet - Page 7

• Manufacturer Part Number: SFN4D-DC5V
• Description: SFN Safety Relay
• Manufacturer: PANASONIC EW

Failure modes, application examples
en_ds_61408_0000: 220305D
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
2)
13
14
14
13
8
7
8
7
3) 3)
14
13
2)
10
3)
12
10
11
9
12
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
6
5
5
6
5
6
5
6
K1
K2
K1
K2
K1
K2
K1
K2
5
6
7
8
7
8
6
5
6
5
5
6
6
5
5
6
6
5
5
6
14
13
14
13
14
13
13
14
14
13
13
14
8
8
7
7
8
8
7
7
10
10
12
11
12
10
11
9
9
10
12
11
10
12
10
11
9
12
12
9
11
11
9
9
12
11
10
12
11
10
12
11
10
9
9
12
11
10
10
12
11
10
12
11
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