Jokab
Safety
JSHD4-KB Art# 20-002-82 Enabling Device w/ LED
+ 4 Buttons, Connector 12pol. Special Execution

Euchner
Safety Switch
TP4-2131A024M
ID# 084145

K. A. Schmersal
Switch
MV. 330-11Y-M20-1366,
G 50-050-M44/44y, TVS 400-12/BZ-M20

C&K Unimax
Safety Switch
SAF4D11M
many more executions available

Kraus & Naimer
Switch
CA10 F41911/ 001
DES S-8615

Schmersal
Safety Switch
Type: AZM 161SK-12/12rka-024
ID# 1166285