The Mercoid®
MPC Pump Controller provides versatile level
control in a standard 1/4 DIN package. Designed for use
with almost any style level transmitter the unit displays
the present level and main set point value. Incorporated
in the MPC is programmable level differential for on/off
control of one or two pumps, valves, or other devices through
two SPDT relays. Also featured are two additional programmable
alarm contacts with front alarm light indication.
The MPC is flexible and incorporates a user-friendly
programming menu. The front face meets NEMA 4X for outdoor
panel mounting. So many features are combined into the MPC
that it eliminates many components in a pump control system.
SPECIFICATIONS
Inputs: 4 (or 0) to 20 mA DC or 2 (or 0) to 10 VDC
selectable.
Input Impedance: Current = 10 ohms, Voltage = 100
K ohms.
Output Ratings:
Control Relays: SPDT, rated 10A @ 240
VAC res., 1/4 hp @ 120 VAC, 1/3 hp @ 240 VAC.
Alarm Relays: SPST, 3A @ 240 VAC res.,
1/10 hp @ 120 VAC.
Control Type: On/off, reverse (pump out) or direct
(pump in) acting.
Power Requirements: 100 to 240 VAC nominal,
+10%-15%, 50 to 400 Hz, single phase; 132 to 240 VDC nominal,
+10%-15%.
Power Consumption: 7.5 VA maximum.
Accuracy: ±0.25% of span, ±1 least significant digit.
Display: Two 4-digit, 7 segment 0.56" high LEDs.
Display Resolution: 1 count.
Memory Backup: Nonvolatile memory (no batteries required).
Serial Communications: Optional RS-232 or RS-485
with Modbus® protocol.
Ambient Operating Temperature/RH: 14 to 131°F (-10
55°C)/0 to 90% up to 104°F (40°C) non-condensing, 10 to
50% at 131°F (55°C) non-condensing.
Weight: 16 oz (454 g).
Front Panel Rating: Meets UL Type 4X (IP66).
Loop Power Supply (isolated): 24 VDC @ 50 mA, regulated.
Seal Failure (Moisture Sensor):
Power: 2.5 VDC.
Search Current: 3 micro amps.
Resolution: 10K to 500K ohms in 10K ohm
steps.
Agency Approvals: UL 508, CE.
NOTE: For compatible level
transmitters, see Mercoid Series PBLT and SBLT.
ACCESSORIES --
See "Ordering" Page
A-900 Weatherproof Enclosure,
Type 4X. Control direct panel mounts in the front of the
enclosure.
A-901 Weatherproof enclosure, Type 4X. Clear plastic
window with rear panel for mounting the control inside the
enclosure.
OPTIONS -- Consult
Factory for Price and Delivery
-232 RS-232 Modbus® -RTU
Serial Communications. Allows remote computer to read and
write all control parameters. Add suffix -232.
-485 RS-485 Modbus® -RTU Serial Communications.
Allows remote computer to read and write all control parameters.
Add suffix -485.
NEW FEATURES
- Alarms can be programmed for output indication of
pump seal failure or over temperature.
- Selectable time delay, for pump two, on power up to
prevent both pumps from starting at the same time. If
power is lost, upon regaining power a time delay of
up to 60 seconds can be selected to prevent too large
of a current draw.
FEATURES
- Selectable pump alternation when used with two pumps
to minimize pump wear. With alternation “on” a seal
failure or over temperature condition will force the
non-failed pump to lead status and stop alternation.
- When used with a submersible pump including a moisture
sensor the MPC has alarm light indication of seal failure.
- When used with a pump including a thermostat the MPC
has alarm light indication of pump over temperature
and removes the pump from service. The Pump can be brought
back into service automatically or by manual reset when
the pump has cooled down.
- Integral 24 VDC power supply for level transmitter.
- Displays pump run time from a front panel button.
- Test System function that simulates the process input
to insure the pumps are operating or to test programming.
- User selectable security lock-out of programming and/or
set points.
- Process input retransmission as a current (4 to 20
mA) or voltage (2 to 10 VDC) analog signal*.
* Standard model MPC is set for current retransmission.
For voltage retransmission add suffix “-RV”.
