Honeywell HD-16DVR-C User Manual

Honeywell 

 

19 

If the sound box and the pick-up cannot be separated spatially, it is easy to 
cause a squeaking noise. In this case you can adopt the following 
measures: 

 

Use better sound pick-up with better directing property.

 

 

Reduce the volume of the sound box.

 

 

Use more sound-absorbing materials in decoration to reduce voice 
echo and improve acoustics environment.

 

  Adjust the layout to reduce the occurrence of the squeaking. 

Please refer to the following sheet for alarm input and output connection.  

There are two alarm input types for you to select: normal open (NO) and 
normal close (NC). 

1. Alarm 

input 

a  Please make sure alarm input mode is grounding alarm input. 

b  Grounding signal is needed for alarm input. 

c  When you are connecting two DVRs or connecting one DVR and 

one other device, please use a relay to separate them 

2. Alarm 

output 

The alarm output port should not be connected to a high power load 
directly (It shall be less than 1A) to avoid high current which may result 
in relay damage. Please use the co contactor to realize the connection 
between the alarm output port and the load. 

3.  Please make sure the front-end devices have been well earthed. 

Improper grounding may result in chip damage. 

You can refer to the following sheet and 

 for alarm input and 

output information.