Nice HYKE HK7024HS Instructions And Warnings For Installation And Use page 7

13
FLASH ELS
14
2
TX
24V 4W
S.C.A. BLUEBUS
1
3
1
RX
NC NO C C NO NC
P.P. STOP
+ –
24 Vcc
P.P. STOP
2
4
OPEN CLOSE
2
1
5