Siemens NK8000 Series Installation, Configuration & Operation page 41

SIEMENS
Power
Vital functions
Tamper
Download
Diagnostic
NK8223
NK822x I C bus addresses
2
Building Technologies
CPS Fire Safety
See LON interface [➙ 21] for additional information.
LON TP/FT-10 network segment characteristics.
Characteristic
Max. cable length (UTP Cat.4) [m]
Termination
Max. number of nodes per segment
Max. number of repeaters
Polarity insensitive
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
module, as well as the power supply cables.
I C interface
2
1
Com 1
Com 2
PW
MAINS
Com 3
AC/DC
Com 4
LOW BATT
BATT FUSE
DF8090
1 2 3 4 5 6 7 8
1 2
3 4
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.
NK822x hardware installation
Bus topology
1,400
2 x 100Ω, 1/8W
at each end of
segment
2 3
DF8040 DF8040 DF8020
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Hardware installation
Free topology
500
1 x 50Ω, 1/8W
at centre of segment
64
4
Yes
4
A6V10062437_a_en
5
C
2
41
30.01.2019