MobileView PENTA, Руководство по установке

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Chapter 3: DVR installation
MobileView PENTA Installation Manual 35
J5 analog, audio out, and relay output connections
The MobileView PENTA provides two Form C relay outputs, dual channel audio
output, and two analog inputs on the twelve-terminal Phoenix connector labeled
J5 (Figure 28). These connections are for general use and can be used for any
number of special or site-specific applications. There is no standard usage for
these connections.
The J5 connector uses retaining screws to ensure that it does not disconnect
during operation. By design, the connector is easily removed if the retaining
screws are fully disengaged and a slight force perpendicular to the connector is
applied. Ensure that the retaining screws are fully engaged or unwanted
disconnection may occur.
Figure 29: J5 analog, audio out, relay output connection
Analog input
The DVR provides two analog inputs. These inputs convert the continuous
voltage sensed at the terminal into a discrete numeric representation of the
instantaneous value. Once converted, analog values above or below set points
can be identified as discrete events, against which specific system responses
can be programmed. A potential usage of the analog input is tracking
temperature fluctuations of key vehicle systems.
Not all vehicle systems that might be monitored provide a voltage output. When
one is not available, a conversion device with corresponding voltage output is
required. Such devices are specific to the monitored system and UTC neither
provides nor specifies them.
The analog to digital converter on the DVR is an eight-bit device supporting up to
255 discrete set points. Set points range between 0 to 254 and correspond to an
input voltage range of 0 to 30 VDC. If full-scale input voltage is less than 30 VDC,
then only a corresponding range of the 255 set points will be available.