MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM047 Rev 13 05/03/30
3
Thomson Technology
Rev 11
02/09/09
Added descriptive information for new software version 1.8
Rev 10
02/02/15
Added descriptive information for new software version 1.7
Rev 9
01/10/17
Clarification of faults required for C282 or NFPA 110.
Rev 8
01/07/18
Addition of “Static Precaution”; deletion of calibration jumpers to
requiring external calibration resistors/potentiometers; standard
fault circuits increase from 12 to 28; Ready status changes to
“Ready to Load”; changes in temperature and pressure calibrations;
extended temperature ratings.
Rev 7
00/12/01
Minor text changes.
Rev 6
00/10/06
Added KVA metering feature.
Rev 5
00/04/06
Changes made to digital fault labels.
Rev 4
99/02/01
Remote communication wiring changes; multiple controllers that
can be connected changes from 5 to 10.
Rev 3
98/05/08
Corrected minor errors.
Rev 2
98/02/18
New version with communication features; expansion relay module
capability and revised password number.
Rev 1
98/01/22
Corrected minor errors.
Rev 0
97/06/04
Original release.
Contact Thomson Technology, to obtain applicable instruction manuals. Soft copy of
most current version is available at
www.thomsontechnology.com
.
1.2. GENERAL
DESCRIPTION
The Thomson Technology MEC 20 Microprocessor-based Engine/Generator Controller
utilizes the latest advancements in microprocessor design technology for the control and
monitoring of engine-generator sets. The MEC 20 provides a comprehensive array of
operational, protection and display features for automatically controlling an
engine/generator set. All standard and optional features of the MEC 20 are configurable
from the front panel LCD display and are security password protected. The LCD display
screen prompts are in plain English, providing a user-friendly operator interface with
many display options available. The microprocessor design provides high accuracy for
