9
2.2 RS-232 Port & ALARM I/O
1 2 3 4 5
9
8
7
6
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. (
5V, 20mA
0V(Active)
)
7.
ALARM IN (INPUT):
This is an alarm input that can be programmed in the menu
system to active low. (
5V, 20mA
0V(Active)
)
8. ALARM
OUT
(OUTPUT):
This is an alarm output trigger. Connect this to external
devices such as buzzers or lights. (
5V, 20mA
0V(Active)
)
9. AUDIO
OUT:
This provides the unit’s audio signal to a speaker.
The pin configuration chart:
Summary of Contents for DDK-1200
Page 2: ......
Page 106: ...104 Figure 6 ...
