Siemens NK8235

Structure and functions
NK823x hardware
4
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Building Technologies
A6V10062437_a_en
Fire Safety & Security Products 30.06.2013
4.2.5 LON interface
The NK823x Ethernet Ports do not have a LON interface and do not support CS6
Guarto intrusion detection systems (use NK822x instead).
4.2.6 Onboard I/O
The NK823x main board is equipped with three digital inputs (X102) and one relay
output (X101). The input signals can be used individually or combined together for
power supply supervision application.
X102 onboard inputs.
Pin Signal Circuit 1
(internal power supply)
Circuit 2
(external power supply)
1 Input 1 (Mains failure)
2 Input 2 (Battery fault)
3 Input 3 (Power supply
fault)
4 Common
5 + Val
6 - Val
X102
1, 2, 3
4
5
6
4K7
100R
X102
1, 2, 3
4
5
6
4K7
100R
X101 onboard relay output.
Pin Signal Circuit
1 Common
2 NO
3 NC
X101
1
2
3
NO
NC
4.2.7 I2C interface: I/O and power supervision
The I
2
C interface (X111) allows for a direct support of:
 Up to 4 DF80xx modules in any combination:
– Up to 4 DF8020 output modules
– Up to 4 DF8040 input modules
– Up to 4 DF8045 supervised input modules (NC inputs)
– Up to 4 DF8046 supervised input modules (NO inputs)
– One DF8090 power supply supervision module
The module can be installed on the DIN-rail, next to the NK823x unit.
DF8020
DF8020 is a module providing 8 relay outputs, NO or NC.