MobileView PENTA, Руководство по установке

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Chapter 3: DVR installation
26 MobileView PENTA Installation Manual
Battery disconnect systems
Many vehicles incorporate a source disconnect device, commonly called a
battery disconnect or knife switch. This device removes power to noncritical
systems during routine maintenance or to inhibit long-term battery drain. When
the DVR is connected to such a device, it is subject to immediate and
uncontrolled loss of power. As a continuous, real-time recording device,
uncontrolled power loss can negatively affect expected system performance.
We have defined two wiring configurations based on the use of a battery
disconnect switch: standard wiring configuration and delay off wiring
configuration.
Standard wiring configuration
Sites that shut down the DVR before activation of the source disconnect device
commonly use the standard wiring configuration as shown in Figure 20 below.
Refer to instructions on using the maintenance plug for manually shutting down
the DVR.
Figure 20: Standard power and ignition wiring diagram
Delay off wiring configuration
Sites that routinely use a source disconnect device and do not manually shut
down the DVR with the maintenance plug must implement a delayed shutdown
wiring scheme equivalent to those shown in Figure 21 on page 27 or Figure 22
on page 27.
In both diagrams, the relay device specified supports a variable time delay of 1 to
100 seconds. When connected to a PENTA DVR, the delay must be set for 10
seconds or greater.