User's Manual

Document:
TBD
Page:
12 of 42
ENGINEERING
Documentation
Revision:
1.6
Date:
24-May-17
Title:
TND540 Requirement
Proprietary and Confidential
This document contains confidential and property information which belongs to Rand McNally, Inc. This
document may not be copied, reproduced, or transmitted to others in any manner, nor may any use of the
information on this document be made, except for the specific purposes for which it is transmitted to the
recipient without prior written consent of Rand McNally, Inc.
Buttons & Indicators
Power Key
Yes
● HW shall support auto power-on when external power is
applied.
● Activation force: 160 +/- 70 gf
Minimum Power key life cycle 50000
Reset Button
Yes
* Reset button is accessible via reset opening in the housing.
Volume Button
Yes
● Activation force: 160 +/- 70 gf
Minimum Power key life cycle 50000
Home Button
Yes
● Activation force: 160 +/- 70 gf
● Minimum Power key life cycle 50000
Charging LED
Dual color LED (Red and Green) to show different charging state.
● Red (Unit is on but not powered)
● Orange (Unit is on with external power and battery is
charging)
● Green (Unit is on with external power and battery is full)
Internal Battery Requirement
Battery Capacity
Charge Cycle: 400 (85% DOD)
Battery charging temperature: 0C to 45C ADD NTC ON BATT
Between 45C and 60C: unit will be powered and keep
running, but battery will not charge.
Battery discharging temperature: -10C to 60C
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