1 2 3
X1 X2 X3 X101 X102 X103 X104 X105
X111
4
Internal DIP switch and jumpers (NKM8001-A2 mainboard)
When closed, it disables the box tamper alarm.
3.2.4 Serial interfaces
⚫
NK8231.2
,
NK8232.2
,
NK8235.2
: these models are equipped with two serial
lines available on the main board.
⚫
NK8235.4
: this model is equipped with 4 serial interfaces (two on the main
board and two on an expansion module). COM3 and COM4 do not support the
hardware-handshaking signals for modem control (Rx, TX, and GND only).
Note: In all NK823x models, the first and the second serial port can be configured
as an RS232 interface using connector COM1 and COM2, or as an RS485
interface using connectors X104 and X105.
All lines are fully RS232 compliant and have EMC/ESD protection.
No galvanic isolation is provided; all serial lines have a common ground.
3.2.5 LON interface
The NK823x Ethernet Ports do not have a LON interface. NK823x supports CS6
Guarto intrusion detection system via a USB network interface (see
Intrusion
Connectivity Guide
, document no.A6V10359489).
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