M553-CTXDC Multifunction Transducer DC Measuring with RS485 & relay output


The M553-CTXDC PowerCom is a multifunction dc power transducer, providing RS485 Modbus communication and a pulsed output in a 55mm DIN enclosure.


The M553-CTXDC has a universal power supply which is suitable for AC or DC auxiliary voltages.
The M553-CTXDC covers a wide range of voltage inputs and current inputs. The current input can be up to 5 amps direct or any value using a mV input
Example: a shunt of 2000A DCwith 50mV output.

Parameters Measured

  • DC Voltage (V)
  • DC Current (I)
  • DC Power (kW)
  • DC Import Energy (kW.h)
  • DC Export Energy (kW.h)
  • DC Ampere Hours (A.h)
  • DC Amp Demand (Ad)
  • DC Max Amp Demand
  • DC Power Demand (kWd)
  • DC Max Power Demand
  • DC Export Power Demand (kWd)
  • DC Max Export Power Demand (kWd)
  • Hours Run (Voltage based)tage based)

Ordering Information

Information RequiredExample
Product CodeM553-CTXDC
Nominal input current50mV
Nominal voltage800v
Auxiliary supply100-440V AC / 100-420V DC, optional 19-69V DC
Auxiliary supply100-440V AC / 100-420V DC, optional 19-69V DC
OptionPulsed Output*

If two pulse output required the RS485 will be removed
– relay to be confiqured at factory


The M553-CTX uses the well established Modbus protocol. This enables remote reading and programming of the M553-CTX using a host computer.

The RS485 network allows up to 32 units to be connected in parallel, enabling them to be used with PC, PLC, RTU, Data loggers and Scada programs.

The PowerCom’s communication port incorporates an auto-configure function which, when connected to an
existing Modbus network, will automatically detect the network’s parameters.

A red LED is provided to indicate that auxiliary power is present, and that the unit is communicating correctly.


The following can be programmed via the RS485 port: current inputs, voltage input, demand times, asign relay.


MultiView set-up and monitoring software is available free of charge from our web-site.

Pulsed Output

An optional pulsed output can be ordered. The relay can be assigned to kW.h (import/export), A.h or it can be configured to act as set-point relay in an over, under or window mode.

General Specification

Rated UnDirectly connected:
800V DC, 300V DC, 150V DC or 60V DC
Range2-120% Un
Overload120% Un
Rated InmV DC, 1A DC or 5A DC
Range2-120% In
Overload120% In
Oveload2 x In for 1 second
Specified @ 23°C 10-100% Un,10-100% In
Parameters unless statedClass 0.3% to IEC 688
Volts and AmpsClass 0.25% to IEC 688
Energy1% of reading to IEC 1036
Installation categoryIII
Degree of pollution2
Rated impulse withstand voltageIEC60947-1-V imp:4kV
Electrical securityIEC 61010-1
Inputs + Aux to case3kV rms 50Hz for 1 min
Inputs + Aux to RS4853kV rms 50Hz for 1 min
Inputs + Aux to relay1k5V rms 50Hz for 1 min
Immunity to :
Electrostatic discharges:
IEC 61000-4-2-Level III
Radiated radio-Hz fields:IEC 61000-4-3-Level III
Electrical fast transient/bursts:IEC 61000-4-4-Level III
Impulse waves:IEC 61000-4-5-Level III
Conducted disturbances:IEC 61000-4-6-Level III
Voltage dips & short interruptions:IEC 61000-4-11
Emissions to:
Conducted and radiated
CISPR11-Class A
Standard:100-440V AC/100-420V DC
Optional:19-69V DC
Working Temperature0 to +60 deg C
Storage Temperature-30 to +65 deg C
Temperature Coefficient0.01% per deg C
Solid-state, low voltage relay.
Rated:100Vpk, 120mA
GeneralIEC 688 BSEN60688
BS4889 IEC 359
UL, C-UL,Pending

Dimensions (MM)

Connection Diagrams

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