Siemens NK8235

5
Hardware installation
NK823x hardware installation
46
Building Technologies
A6V10062437_a_en
CPS Fire Safety
30.01.2019
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
1 2
3 4
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.
Installation in Subsystem Housing Without DIN-Rail
NK823x can be installed without the plastic box using the specific mounting kits
available for CS11/CS440 and SI410. Note that the NKA8011-A1 mounting plate is
also needed together with the specific mounting kits.