Datasheet

SFN4D
5
ds_61408_0000_en_sfn4d: 141106D
APPLICATION NOTES
The SFN4D Safety Relay
Legend for interpreting contact conditions
The SFN4D under normal operating conditions
Contact NC (Normally Closed) NO (Normally Open)
Condition Closed Fully open Open Open or closed Closed Fully open Open Open or closed
Symbol
Contact gap 0
Maximum
(~1.5mm)
>0.5mm
(forcibly guided)
Not defined 0
Maximum
(~1.5mm)
>0.5mm
(forcibly guided)
Not defined
Condition Illustration of Relay State Condition of Contacts
- Coil deenergized.
- Armature in deenergized
position.
- NC contacts closed.
- NO contacts have a contact
gap of approx. 1.5mm.
- Coil energized.
- Armature in energized
position.
- NO contacts closed.
- NC contacts have a contact
gap of approx. 1.5mm.
NC contact 5-6
Sub card 1
NO contact 7-8
NO contact 9-10
Sub card 2
Armature
NO contact 12-11
Main card
NC contact 16-15
NO contact 14-13
Remark:
Only NC 5-6 monitors
all NO contacts!
5
6
7
8
9
10 11
12
13
14
15
16
5
6
7
8
9
10 11
12
13
14
15
16
5
6
7
8
9
10 11
12
13
14
15
16