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06/10/2021 - Technical Bulletin - VMAX IP Plus DW-VP9xT4P (3rd Generation) Alarm Input Ground

https://hf-files-oregon.s3-us-west-2.amazonaws.com/hdpdigitalwatchdog_kb_attachments/2019/09-24/4763eb2b-7c2d-49d6-bfc0-47620cc0f150/image.png                                                                         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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For More Information or Technical Support

DW Technical Support:

Toll-free:  866.446.3595

digital-watchdog.com/contact-tech-support/

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Rev: 06/21                             Copyright © DW. All rights reserved. Specifications and pricing subject to change without notice.