Installation Instructions

Connect external components
Call station PT2009-A1
7
114 | 122
A6V11899867_en--_a
Pin
Description
Remark
1
Signal +
-
2
Signal -
-
Pin
Description
Remark
1
GND
-
2
24 V
-
3
NC
Do not use this pin
4
3.3 V
3.3 V is not required to connect the
extension module
5
SDA
-
6
SCL
-