The PM04 is a new generation of Phase Power Measurement Module that measures electrical data in a three-phase supply network. The electrical data will be filtered and processed faster in this module. The voltage is measured via network connection to L1, L2, L3 and N. The current of the three phases is fed to IL1, IL2, IL3 and IN (two clamping points each + & -) via current transformers or via Rogowski coils. The module transmits metrics (e.g., reactive/apparent/effective power, energy consumption, power factor, phase angle, frequency, over-/undervoltage) directly into the process image, without requiring high computing power from the controller, there is an onboard 2 CPUs one for processing data and one for transmitting to backplane bus.


Comprehensive metrics and harmonic analysis up to the 41st harmonic permit extensive network analysis. Metrics allow the operator to optimize the supply to a drive or machine, protecting the system from damage and failure. Insulation failures can be detected and prevented via current measurement performed in the neutral conductor.


Datasheet: PM04B

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Power Measurement

3 voltage measurement inputs, 4 differential current
measurement inputs.

Input resistance voltage path:        1429 KΩ

Measurement Resolution [bit]:        24 Bit
Input resistance current path typ.: 22 mΩ
Frequency range:                               0..3300 Hz
Frequency range power supply:      45..65 Hz
Max measurement current (RMS): Rogowski sec. coil=1300mV
Max measurement rated voltage:   VLN=400VAC, VLL=690VAC

Temperature Measurement

1 PT100 measurement inputs.

Resolution:                                              16 bit
Update time:                                            4 ms
Input resistance current path typ.:      22 mΩ
Accuracy (at 25°C):                                ±0.1%
Temperature drift:                                  ± 25ppm/°C ± 25ppm/°C
Power-freq. noise rejection:                 50Hz

Introduction to LB2 I/O Series

The Brodersen LB2 I/O modules are designed for the RTU32M & RTU32N series. The I/O modules are in two parts, a bottom part containing the backplane bus, and a top part containing the I/O board and logic. All LB2 modules are hot swappable and equipped with a 200 MHz processor to process I/O, handle filtering, SOE, debounce, module clock and general module logic. Diagnostic variables are available for all LB2 I/O modules. Please see the module datasheets for full info.

Module firmware update is handled at the RTU level from the Brodersen WorkSuite.

Use only genuine Brodersen bus cables for connection to Brodersen RTUs and for extension of I/O module blocks. The connection cables for the LB2 backplane bus are designed to meet the power requirements and shielding to run high speed communications. The maximum overall length of a complete system is 30 meters. Each LB2 I/O module & power supply module is calculated as 2 cm. The cables are as the length indicates, e.g. UCC-610/1 count as 100 cm.

The maximum system configuration is 60 I/O modules on one LB2 Bus. If the configuration exceeds 60 I/O modules, an additional CPU is required.