M-BUS-1 / User Manual
9
Revision 10
-
3 OPERATION
CONTACTS
Converter has 10 contacts, see table below:
Contact
Designation on the board
Description
1
OUT_2
Open-drain output 2
2
OUT_1
Open-drain output 1
3
+VPWR
Power +
4
Power -
5
MBAS-
M-BUS -
6
MBAS+
M-BUS +
7
COUNT_2
Security input 2
8
Ground
9
COUNT_1
Security input 1
10
Ground
Ground contacts 8 and 10 are used for connection of security inputs COUNT_1 and
COUNT_2.
Security inputs of the M-BUS-1 device are used to connect circuits with the following
types of NO contacts:
- reed switch (Herkon);
- mechanical pushbutton;
- open-drain output.
