User Manual – Rev AY AMETEK Programmable PowerMX Series 804. Front Panel Operation4.1 Tour of the Front PanelThe MX Series with type P or type Pi have identical front panels although some of the keys foundon the front panel are only used by MX models with the 3Pi controller. If your unit is a P typecontroller, these keys will act as don’t cares. This chapter provides information on operating theMX with either controller type.Before operating the AC source using the front panel, it helps to understand the operation of thefront panel controls. Specifically, the operation of the knob, keyboard and the menu layout arecovered in the next few paragraphs.4.1.1 Front Panel Controls and IndicatorsThe front panel can be divided in a small number of functional areas:• Mains circuit breaker• Status Indicator lights• Shuttle knob• LCD display• FUNCTION keypad• DATA ENTRY keypad4.1.2 System On/Off Circuit BreakerThe circuit breaker located on the bottom left side of the front panel disconnects the low voltagesupply of the MX Source from the three phase Line input. This will remove power from the mainsAC input contactor and thus remove input power from the MX Series power source. As such, thecircuit breaker acts as an indirect power on/off switch for the MX Series unit. Note however thanAC input power remains applied to the primary side of the input transformer.When the input current rating of the MX Series AC power source is exceeded, the protectivefuses (F1 through F3) will blow. In this case, power to the low voltage supply may still remainthrough the front panel circuit breaker. In this case, the on/off circuit breaker should be opened(power off) first followed by a complete disconnect of all ac input power through an installed maincircuit breaker.Note that in MX60, MX90 and MX135 systems, each unit has its own on/off circuit breaker andset of line input fuses.
