Alarm Output Connection; Hard Disk Installation - HIKVISION DS-M5504HNI Series User Manual

1.6.2 Alarm Output Connection

The alarm output interfaces B1 and C1 of the mobile NVR is closed normally if no alarm occurs. When an alarm output is
triggered, the corresponding A1 and B1 interfaces will be connected. Thus, the active alarm device is required for the
system.

1.7 Hard Disk Installation


Use the factory recommended 2.5-inch hard disk.

For single HDD installation, the thickness of the HDD should be 9.5mm or 7mm; for double HDD installation, the
thickness of each HDD should be 7mm.

Initialize the HDD for recording after the installation. Otherwise, the system will give an audible warning for HDD
error. For details, see 4.1.1 Initializing the HDD.
Perform the following steps to install the HDD on the mobile NVR.
Steps:
1. Prepare the tools and components for installation:
two 2.5-inch SATA HDDs, antistatic gloves, key
to hard disk lock, cross screwdriver, conventional
screws and sunk screws.
Put on the antistatic
installation.
Mobile Network Video Recorder User Manual
Figure 1. 8 Alarm Output Connection
gloves before the
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