DW Technical Bulletin
To: DW® Customers
Date: June 10, 2021
Re: VMAX® IP Plus™ DW-VP9xT4P Alarm Input Ground
VMAX® IP Plus™ DW-VP9xT4P (3rd Generation) Alarm Input Ground
Affected Model Numbers: DW-VP9-4P
Effective Date: June 10, 2021
When connecting alarm inputs of external sensors for alarms and event triggers to the 9-channel VMAX® IP Plus™ (DW-VP9xT4P), users will need to use the grounding screw of the NVR’s case to ground the RS-485 wire connections.
Identifying VMAX® IP Plus™ Model Generation
While the 1st and 2nd generation VMAX® IP Plus™ units have a dedicated RS-485 port to ground connections, the alarm input (RS-485) ports of the 3rd generation VMAX® IP Plus™ differs. When attaching an RS-485 connection to the alarm input of a 3rd generation unit, the installer will need to connect the negative pole wire to the screw (see image) above to ground the connection.
You can identify the generation of a VMAX® IP Plus™ by referring to the table below:
|
Model |
S/N Starts With |
Firmware Filename |
||||
|
1st gen |
2nd gen |
3rd gen |
1st gen |
2nd gen |
3rd gen |
|
|
DW-VP9-4P |
VP**** |
NPK09**** |
FPK09- |
HN-6209_dw_v1.xxx |
HN-6509_DW_v1.x.x.x |
DW-VP09 vx.x.x.x |
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Rev: 06/21 Copyright © DW. All rights reserved. Specifications and pricing subject to change without notice.
