Installation guide
3 
I/O Terminal Block Circuit 
I/O Terminal Block Pin Definition 
This Camera provides a external I/O terminal block which is used to connect input/ output devices. 
The pin definitions are described below. 
PIN  Definition  Description  Max. V/A 
1 
Ground 
- 
2 
+ 5V DC 
  5V DC 
0.5W 
3 
AUDIO_In(+) 
Unbalanced, 1.4Vp-p, 1Vrms, terminal block   
- 
4 
AUDIO_In(+) 
Unbalanced, 1.4Vp-p, 1Vrms, terminal block   
- 
5 
Digital Output 1 
Uses an NPN transistor with the emitter connected to the GND 
pin. If used with an external relay, a diode must be connected in 
parallel with the load for protection against voltage transients. 
100 mA 
24V 
7 
Digital Input 1 
Connected to GND to activate, or leave floating (or unconnected) 
to deactivate. 
30V DC 










