MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
6
2.4. DC VOLTAGE INPUTS
All DC voltage inputs to the MEC 2 are optically isolated and filtered for protection from
noise spikes and transients. Input wiring must be routed so that it is not near electrically
"noisy" wiring such as ignition, starter wires or main AC power conductors. All contacts
must be “dry” (i.e. non-powered) and one side must be connected to the common DC
negative conductor.
2.5. AC VOLTAGE INPUT
The MEC 2 can accept direct AC voltage input from 120-600VAC (nominal). Note:
Direct input voltage sensing can only be used when the generator utilizes a single phase
3 wire or 3 phase, 4 wire distribution system with a solidly grounded neutral conductor.
For 3 phase 3 wire systems (i.e. no neutral) or high voltage systems, potential
transformers must be used. Refer to FIGURES #1 - 4 for voltage sensing connections.
To display generator line to neutral voltage in a 3 phase 4 wire system, the neutral must
be connected as shown.
To Next Page
Loading...
