Maximum demand control devices

MDC-20

MDC-20, Maximum demand control unit

Code: M61410.

  • 8 digital inputs for logical states or counting impulse signals (electric energy meters, water meters, gas meters, etc.)
  • Load status feedback (inputs/outputs). Expandable via auxiliary LM range units
  • Historical records of over one year with a log of up to 4500 electrical variables, averaged every 15 minutes, maximum and minimum values over the period (Period can be modified. Ring buffer)
  • RS-485 BUS for connecting up to 12 LM4 i/o

INFORMATION

Description

The MDC-20 is a unit designed to predictive control the maximum demand of an installation. It means that the unit connects and disconnects the installation’s electrical loads (non-priority loads) to ensure that the maximum power contracted is not exceeded. Management of the loads is done in accordance with the power rating of the loads, the maximum configured power, and the current energy measured. This system optimises the consumption of energy in the installation because it allows the maximum number of loads to be used simultaneously but does not exceed the contracted power, which would result in high penalties.

The unit is equipped with relay outputs that enable the management of up to 6* electric loads without expanding.
*(It is possible to use the output for some alarms conditions. In this case, the number of free relays to control local loads is 4).

  • Peripheral communications fault alarm
  • Insufficient loads for the power control
  • It is possible to expand the number of controlled loads by the MDC-20 with up to 12 LM4I/4O operated by RS-485 communications.

Its main features are:

  • Demand management by disconnecting up to 6 non-priority local loads.
  • Expandable until 54 loads with 12 LM4I/4O units through the RS-485 port.
  • Instantaneous energy value reading through Modbus/RTU
    communications or the impulse input.
  • Synchronising impulse input.
  • Ethernet connection to centralize it in other applications or communicating with remote peripherals on the ethernet network.
  • Feedback load status control through the logic status of the inputs
  • Centralising consumptions by impulses.
  • Disabling load management according to schedule.
  • Simulation tool for verifying system behaviour.

SPECIFICATIONS

AC power supply
Nominal voltage
85 …264 Vca / 120 … 300 Vcc
Frequency
50/60 Hz
Consumption
5…8 VA
Digital relay outputs
Type
Relay
Nominal voltage
250 V ~
Resistive load (max.)
5 A
Electrical life
3 x 104
Mechanical life
2 x 107
Maximum switching capacity
750 VA
Digital inputs
Quantity
8
Type
NPN, potential-free
Input/output insulation
Optoisolated
Minimum signal width
tON/tOFF min.: 50 ms
Mechanical characteristics
Weight (kg)
0,29
Size (mm) width x height x depth
105 x 90 x 70 (mm)

DIMENSIONS

CONNECTIONS

VIDEOS

MDC-20. Maximum Demand Control with integrated Web Server

DOWNLOADS

User's manual
Technical guide
Datasheet
Presentation
CE-certified
Product video
Software & Firmware
Catalogue
Leaflet

ACCESORIES

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