Siemens NK8235

Hardware installation
5
NK823x hardware installation
50
Building Technologies A6V10062437_a_en
Fire Safety & Security Products 30.06.2013
COM 1 … COM 4: RS232 Connectors
RS232 lines are connected to 9pin D-Sub connectors, female type.
RS232 connections.
Pin Assignment
NK822x NK823x COM: 1-2 NK8235.4: COM 3-4
1 CD CD
2 RXD RXD RXD
3 TXD TXD TXD
4 DTR DTR
5 GND GND GND
6 DSR DSR
7 RTS RTS
8 CTS CTS
9 RI RI
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
NK8235
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 DF8045 DF8020
PW
MAINS
AC/DC
LOW BATT
BATT FUSE
12
34
NK823x 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: address 3.