PG DRIVES TECHNOLOGY S-DRIVE – APPENDIX - A
SK76745/10
Compliance of the S-Drive range of Scooter Controllers with ISO 7176-14: 2008
This document reviews the S-Drive range of Scooter controllers against each section of ISO 7176-14: 2008. In each instance
statements are made as to whether the S-Drive does or does not meet the requirement. Additionally, if the S-Drive requires the
Scooter OEM to take specific measures, then relevant recommendations are made.
This document is for guidance only and it is still the responsibility of the Scooter OEM
to ensure the vehicle complies with all relevant requirements.
Release: 1
Date: 21st September 2009
Conformity of the S-Drive product family with ISO 7176-14:2008
1 General
PG Drives Technology has been assessing conformity of the S-Drive product family with the second (2008) edition of ISO 7176-14.
This document summarises the findings.
5.3 Slope stopping distance
The stopping distance criteria for a number of tests have changed in the 2008 edition, and the inclination of the test slope has
changed from 5° to 6°. Scooters vary with regard to the vehicle dynamics and settings selected for the controller by the scooter
manufacturer. Accordingly, scooter manufacturers should determine for themselves whether the results of testing in accordance
with the first edition still apply.
7.1 Single-fault safety
S-Drive products are designed for single-fault safety and can provide supporting information to test personnel.
7.2 Command signal failures
7.2.3.2 Open-circuits
S-Drive products meet the open-circuit command signal requirements.
7.2.3.3 Short-circuits
S-Drive products meet the short-circuit command signal requirements.
7.2.3.4 Leakage tests
S-Drive product installations can meet the leakage requirements of the new edition. To do so it is necessary to address the
following areas:
1) the configuration of the throttle circuitry;
2) specifications for the throttle potentiometer;
3) minimum values for the deadband setting;
4) managing the risk of moisture-induced leakage.
More information on this topic can be found in the annex “S-Drive command signal leakage”.
7.3 Output device failures
S-Drive products meet the output device failure requirement.
7.4 Loss of power
S-Drive products meet this requirement.
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