Pulsafeeder MPC - Manual (Page 7)

includes a real-time display of signal level. This eliminates the need for external
meters.
The MPC readily accepts PULSAlarm
®
leak detection and tank level inputs.
These may be configured to stop the pump and/or activate an alarm relay.
The MPC is factory configured to operate at either 60 Hz or 50 Hz input. No
special modifications, settings, or adjustments are required. All MPC controllers
are supplied with a motor rated at 60 Hz, regardless of the supply frequency.
The controller/motor combination allows for full pump speed and flow even
when operating from a 50 Hz input. Users in locations with 50 Hz AC supply do
not have to de-rate pump flow with this controller.
The motor used with the MPC is a three-phase motor; however the three-phase
power is generated internally by the MPC itself. Do not be confused by the
motor nameplate. Input power to the MPC is single-phase AC only; either 115
or 230 volts (see Section 13, Specifications for acceptable input voltage
range). The nameplate on the rear of the MPC controller lists the appropriate
supply requirements.
At lower stroke frequencies (below 3:1 turndown), the MPC employs intermittent
motor actuation technology. This allows the user to achieve reliable low-end
performance not usually associated with variable speed controllers. By
completing a full pump stroke at constant speed, and varying the interval
between strokes, hydraulic stability and process consistency is maintained.
The AC drive used in the MPC maintains tight control over voltage and current
supplied to the pump motor. This results in lower motor operating temperatures
and less stress on motor windings, resulting in longer motor life and more
reliable overall operation. This holds true even when metering in the lower flow
ranges where the MPC uses intermittent operation.
3.1 MPC Standard Features
• Remote keypad and display for ease of operation
• Display pump flow in GPH, LPH, Strokes per Minute, or % of full pump
flow
• One 4-20 mA analog input signal for flow control
• One 4-20 mA analog output signal for flow feedback
• Two configurable digital inputs
• Three configurable digital outputs
• Advanced turndown capability
• NEMA 4X and IP56 ratings
• Available for 115 or 230 Volts, 50 or 60 Hz, single phase AC power
• Security code lockout of menus
• Commercial duty motor as standard for indoor, dry locations only