Siemens NK8222 Installation, Function & Configuration page 36

Hardware Installation
36
Building Technologies
Fire Safety & Security Products
X2/X3: Ethernet connector NK823x
A standard RJ45 connector connects Ethernet. Cat.5 UTP cabling is best suited.
Pin Assignment
1 TX+
2 TX-
3 RX+
4 n.c.
5 n.c.
6 RX-
7 n.c.
8 n.c.
X101: Onboard I/O (output relay)
Pin Assignment
1 Common
2 NO output
3 NC output
X102: Onboard I/O (inputs)
Pin Assignment
1 Input 1 (or Mains failure)
2 Input 2 (or Battery fault)
3 Input 3 (or Power supply fault)
4 Common
5 + Val
6 - Val
 See onboard I/O schematics 5.6 p.25.
NK823x power supply connection
Note the dual power supply input for redundant solutions
Fig. 21 NK823x power connections
27Ah 12V
Vin = Voltage In
Vout = Voltage Out
Batt = Battery
048_DMS_NK8000_ICC_MP4.40_A6V10062437_a_en.doc
06.2011