11
2.2 RS-232 Port & ALARM I/O
1. RS-485 D-
2. RX:
This pin is one of the RS-232 pins. It connects with the TX pin of another device.
3. TX:
This pin is one of the RS-232 pins. It connects with the RX pin of another device.
Please refer to the note below on the standard RS-232 9 Pin Cable with Pin 2 and
Pin 3 exchanged; see the pin configuration chart below for details.
4. RS-485 D+
5. GND:
Ground contact.
6. ALARM RESET (INPUT):
This pin connects to an alarm-clear device for clearing an
alarm. (
)
7. ALARM IN (INPUT):
This is an alarm input that can be programmed in the menu system
to active low. (
)
8. ALARM OUT (OUTPUT):
This is an alarm output trigger. Connect this to external
devices such as buzzers or lights. (
)
9. AUDIO OUT:
This provides the unit
’
s audio signal to a speaker.
The pin configuration chart:
1 2 3 4 5
9
8
7
6
5V, 20mA
0V(Active)
5V, 20mA
0V(Active)
5V, 20mA
0V(Active)
Camera
RS232
PC
RS232
