Siemens NK8232

Structure and functions
3
NK822x hardware
23
Building Technologies
A6V10062437_a_en
CPS Fire Safety
30.01.2019
3.1.7 I2C interface: I/O and power supervision
This interface allows for a direct support of:
⚫ Direct digital input/output:
– One or two DF8040 (CF9040) input modules
– One DF8020 (CF9020) output module
⚫ Power supply supervision:
– One DF8090 power supply supervision module
All modules can be installed on the DIN-rail, next to NK822x unit.
DF8020
DF8020 is a module providing 8 relay outputs, NO or NC.
DF8040
DF8040 is a module providing 8 inputs, which can be normally open or normally
closed and driven by dry contacts or open collector signals
See NK822x hardware installation [➙ 36] for more information on the connection of
I/O modules to the NK822x
DF8090 Power Supply Supervision
DF8090 is a module designed for monitoring a 12V DC power supply. It can detect
the conditions listed below, shown on the DF8090 local panel and report them to
NK822x, and in turn to management station (see the following):
⚫ Mains failure (no 220VAC)
⚫ Battery low
⚫ Power supply failure (trouble with AC/DC converter)
⚫ Battery protection fuse blown (internal micro-fuse type MSF 3.15A/250V)
1
2
PW
MAINS
AC/DC
LOW BATT
BATT FUSE
DF8090 front panel
Item
Description
1
LEDs.
2
I
2
C connector to I/O modules.
See figure NK822x power connections (see NK822x hardware installation [➙ 36])
for the NK822x power connections using the power supervision module.