8/7/2019 CV60 DC Converter Recommendations

http://slidepdf.com/reader/full/cv60-dc-converter-recommendations 1/1

Intermec CV60 Vehicle Power Supply InstallationRecommendations for Wal-Mart

1

Intermec has encountered several instances where there was

insufficient metal available in yard trucks used by Wal-Mart at

Distribution Centers to properly sink the heat generated by the

DC-DC power supplies used to operate the CV60 computersin those yard trucks. In these circumstances, a metal plate

must be fabricated and provided by the site to accomplish the

heat sinking that these power supplies require.

In Wal-Mart Distribution Centers where pilot installations

were conducted, Intermec found that DC-DC power supplies

suffered from repeated shutdowns due to overheating without

the metal plate in yard trucks with fiberglass or composite

materials in the cab.

The Intermec CV60 Vehicle Power Supply Installation Guide

calls for a minimum of 130-160 square inches of metal for

mounting DC-DC power supplies to allow for proper heat sink 

functionality. Intermec has found that a 6.5x25-inch aluminum metal plate ¼” thick has provided adequate heat sinking for

DC-DC power supplies in previous yard truck installations completed at Wal-Mart Distribution Centers. This metal plate can

be installed on the frame rail above the right side window

or other convenient location in the yard truck (out of 

direct sunlight,) and then the DC-DC power supplies may

be mounted to the metal plate (see photos.)

Intermec recommends that Wal-Mart adopt this

method of installation for DC-DC power supplies for

all future implementations when the situation

indicates that there is insufficient material to achieve

proper heat sinking action.

Intermec has also found that the use of a 4x4-inch 1/8”

thick aluminum plate to be used for mounting the ball

mount on trucks with fiberglass dashboards will preventthe tear-out of the mounting holes due to the rough

handling of the Yard Trucks. We recommend the use of 

this mounting plate as well on trucks equipped with

fiberglass or composite dashboards.

In addition to the metal plates used for heat sinking the

power supplies, Intermec also recommends the installation of an isolation switch of a sufficient rating to handle the entire

current load of the two DC-DC power supplies. This should be installed on the positive leads of the power supplies so that

the entire CV60 and power supply combination can be isolated from the vehicle battery. The DC-DC power supplies may

draw up to 8 Amps when the CV60 is in operation with the screen heater functioning, and will continue to draw

approximately 350 milliamps when the CV60 is turned off. As a result, they may drain the battery if left connected for

extended periods of time. Intermec recommends a panel-mount SPST Toggle Switch rated for 15 Amps at 30VDC, designed

to be installed in a ½” mounting hole.

Intermec recommends that Wal*mart adopt the practice of installing of an isolation switch for all future DC Yard

truck implementations to eliminate the possibility of the vehicle battery being drained when the truck is parked for an

extended period of time (such as overnight.)

Recommended additional materials for each DC Yard truck:

Aluminum plate 6.5 x 25.0 inch by 1/4” thick for mounting the DC-DC power supplies (Qty -1).

Aluminum plate 4.0 x 4.0 inch by 1/8” thick for reinforcing the ball mount location (Qty – 1).

Toggle Switch 15 Amp, 30VDC SPST, panel mount, ½” mtg hole for system isolation (Qty – 1).