Siemens NK8232

Hardware installation
5
NK822x hardware installation
41
Building Technologies
A6V10062437_a_en
CPS Fire Safety
30.01.2019
See LON interface [➙ 21] for additional information.
LON TP/FT-10 network segment characteristics.
Characteristic
Bus topology
Free topology
Max. cable length (UTP Cat.4) [m]
1,400
500
Termination
2 x 100Ω, 1/8W
at each end of
segment
1 x 50Ω, 1/8W
at centre of segment
Max. number of nodes per segment
64
Max. number of repeaters
4
Polarity insensitive
Yes
NK822x has a built-in termination resistor (100Ω) for a doubly terminated bus
topology that can be enabled by closing the internal jumper JP6.
See Internal jumpers [➙ 19] and LON interface [➙ 21].
Note: Please refer to the Echelon Manual for detailed specification on how to set
up a LON network: http://www.echelon.com/Support/documentation/, section:
Engineering Bulletins > Media & Wiring.
DIN Rail Installation
The modules are supplied in a plastic box that can be easily attached to the DIN
rail by hooking it on the top of the rail and pressing it in on the opposite side. To
detach the box, pull downward on the tab located at the rear of the module. The I/O
modules are mounted the same way.
Note: Before removing the box, carefully disconnect the flat cable (bus) of the I
2
C
module, as well as the power supply cables.
I
2
C interface
1 2 3 4
SIEMENS
NK8223
Power
Vital functions
Tamper
Download
Diagnostic
Com 1
Com 2
Com 3
Com 4
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 8
DF8090 DF8040 DF8040 DF8020
PW
MAINS
AC/DC
LOW BATT
BATT FUSE
1 2
3 4
NK822x I
2
C bus addresses
Item
Description
1
Address setting (factory setting): address 8.
2
Address setting (factory setting): address 1.
3
Address setting: address 2.
4
Address setting (factory setting): address 1.