Siemens NK8223

3
Structure and functions
NK822x hardware
20
Building Technologies
A6V10062437_a_en
CPS Fire Safety
30.01.2019
1 2 3 4 5
NK822x internal DIP switch and jumpers
Item
Description
1
DIP-Switches
2
Reset button
3
JP6: enable LON resistor.
4
Tamper switch
5
JP3: disable tamper or connect to external tamper.
3.1.4 Serial interfaces
NK8223 / NK8225: although the maximum number of serial lines is 4, they are not
always used. There are two serial lines available on the base module and two on
an expansion module.
NK8222: this model is equipped with two serial lines only available on the base
module.
Note: In all modules, the first serial port can be configured as an RS232 interface
using connector COM1 or as an RS485 interface using connector CN4.
All lines are fully RS232 compliant and have EMC/ESD protection.
No galvanic isolation is provided; all serial lines have a common ground.