Camille Bauer LINAX PQ5000

Power quality analyser

LINAX PQ5000 combines native power-quality recording with electrical and energy measurements. Use its Ethernet Modbus TCP interface for Edge monitoring. Start with frequency, then add readings for the configured electrical system. Modbus RTU is a separate option.

  • Modbus TCP
  • Modbus RTU
  • HTTP
  • IEC 61850
  • PROFINET

Power quality analyser

Compatibility

Read-only Modbus TCP monitoring

The OEM PQx000 map identifies PQ5000 and specifies FC03, address offsets and float order. This supports a documented starting procedure, without a physical Edge test.

Stationary LINAX PQ5000 with Ethernet. Use PM 1001601 000 10 as a best-effort starting map and compare with the local interface. Record current-input options and firmware. Monitoring only.

Connect it with

Stationary PQ5000 has Modbus TCP enabled on the local network

  • Modbus
  • Edge
  • Platforms
Power quality analyser
Interface
Gateway
Edge
Output
LINAX PQ5000LINAX PQ5000
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeModbus client + register map
Customer platformMQTT · API · files
Modbus TCP
Protected Ethernet
Runs locally
Optional onward data
Add the meter IP to the Edge Modbus TCP client. Use unit identifier 255 (0xFF), as shown in the OEM TCP example, and FC03 read operations. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
Stationary DIN-rail LINAX PQ5000Standard RJ45 Ethernet interface with Modbus/TCP and HTTP/HTTPS; confirm whether the separate Modbus/RTU interface is fittedRetain the exact installed firmware and options before selecting any monitoring interface. No direct Edge path is released here.
PQ5000 with conventional current inputs or Rogowski current inputsConventional inputs use nominal 1 to 5 A current signals. The Rogowski version uses the documented ACF3000 arrangement and has additional sensor uncertainty.Confirm the input hardware, sensor, transformation ratio and wiring. Do not apply a conventional CT configuration to a Rogowski input.
PQ5000 with optional IEC 61850 or PROFINET interfacesThe handbook describes separate interface modules and network settings for IEC 61850 and PROFINET.These options do not establish an Edge interface. A rule for the PROFINET process image must not be applied to Modbus values.

Specifications

The PQ5000 is the DIN-rail member of the PQx000 family. The handbook distinguishes its voltage limits and power-quality class from other family members. Select the full hardware configuration before choosing sensors or a communications path.2

Current input
Conventional nominal input 1 to 5 A; maximum 7.5 A sinusoidal. Rogowski versions require their separately specified sensor arrangement.2
Nominal voltage
57.7 to 400 V phase-neutral and 100 to 693 V phase-phase; UL limits 347 V and 600 V respectively. PQ5000 maximum sinusoidal measurement is 520 V phase-neutral / 900 V phase-phase; this is not a nominal connection rating.2
Power quality
PQI-A for PQ5000 under IEC 62586-1; handbook describes IEC 62586-2 conformity assessment and IEC 61000-4-30 flagging. Retain the applicable instrument evidence for a formal PQ report.2
Energy accuracy
Active energy class 0.2S under EN 62053-22; reactive energy class 0.5S under EN 62053-24. Sensor and installation conditions still apply.2
Acquisition and storage
18 kHz internal sampling and 16 GB internal memory. These do not define the Modbus polling rate or external data retention.2
Ethernet
RJ45, 100BaseTX, 10/100 Mbit/s; Modbus/TCP and HTTP/HTTPS on the standard interface. IEC 61850 and PROFINET have separate optional interfaces.2
Environment
Indoor use, up to 2000 m; -10 to +55 degrees Celsius without UPS, 0 to +35 degrees Celsius with UPS. Housing IP30 and terminals IP20.2

Interface

Documented measurements and integration boundaries for LINAX PQ5000.

  • Start with frequency, then add voltage, current and power for the configured electrical system.
  • The manual uses one-based 4x register references and zero-based addresses in transmitted requests. Function 0x03 reads holding registers; the table marks function 0x04 as not implemented.
  • REAL32 and REAL64 use IEEE 754 with the least-significant 16-bit register first. The documented reply keeps the high byte first within each register. Preserve the selected field type rather than decoding every value as a two-register float.
  • Energy counters have separate REAL64 and REAL32 read representations. The map also contains writable counter-setting and remote-output areas, which are outside this monitoring review.
  • Use the timestamp checks documented for historical records. For instantaneous reads, store acquisition timestamps and mark failures or non-finite values as missing.

Assessment

Stationary LINAX PQ5000, using the OEM starting map and local-interface comparisons.

InteroperabilitySupported with conditions
The OEM map documents the model, FC03 reads, address offset and float order for a practical monitoring setup.1
AccuracySupported with conditions
The handbook defines input ranges, energy accuracy and PQ functions. Correct current-input selection, sensor uncertainty and electrical-system configuration remain conditions.2
SecuritySupported with conditions
The handbook documents service blocking, client whitelists, HTTPS and role-based access. HTTPS protection must not be assumed to encrypt Modbus/TCP; network restrictions and disabled writes remain necessary.12
ReliabilityNot yet assessed
A universal instantaneous unavailable-value code is not established. Treat failed or non-finite reads as missing.12
RuggednessSupported with conditions
Indoor temperature, altitude and enclosure limits are documented; the UPS option narrows the operating temperature range.2
ScalabilitySupported with conditions
The handbook states at least five simultaneous Ethernet client connections. A bounded polling design still needs response and load checks against the installed device.2
LifecycleSupported with conditions
Versioned manufacturer manuals are retained. Keep firmware and option records with the project and re-review changes rather than treating the family map as permanent coverage.12

Setup

First read: supply frequency

Start with system frequency, which the OEM table lists for every documented electrical-system configuration.

Function
FC03, read holding registers; FC04 is not implemented
Start address
149 decimal (0x0095), corresponding to one-based 4x register 150
Length
2 registers
Decode
32-bit IEEE 754 float, low word first (CDAB wire-byte order), in Hz
Example
Words 0x0000, 0x4248 reconstruct 0x42480000 = 50.0 Hz. This is a decoding example, not a measured device response.

Acceptance: Keep the point when it agrees with the local interface. If it differs, check the client address offset and word order. Store timestamps and mark failed or non-finite reads as missing.

  1. Identify the installed configuration

    Retain the nameplate, full ordering code, firmware and available options. Distinguish the stationary PQ5000 from mobile, rack and Current Link models.

  2. Document the measurement boundary

    Record the electrical system, voltage connection, current-input variant, sensor ratios, polarity and phase assignment. Match the selected quantities to the manual’s system-availability table.

  3. Read frequency first

    Read one-based register 150 using raw address 149, FC03, 2 registers. Decode REAL32 with the low word first and compare Hz with the local interface.

  4. Constrain the network and function set

    Enable the required service and restrict clients to the monitoring network. Use documented read operations; keep counter settings, resets and outputs outside the monitoring client.

  5. Commission against independent evidence

    Compare voltage, current and power with the device interface under known operating conditions. Store raw replies, decoder settings and timestamps. Use these comparisons to expand the point set.

Common questions

Can Edge read the LINAX PQ5000 over Modbus TCP?
Yes, use the documented Ethernet Modbus TCP path and the first-read procedure below. Compare the first readings with the device interface before adding more points.12
Does the documented zero value mean an invalid Modbus reading?
The handbook’s zero-value statement is in its PROFINET process-image section. The Modbus map separately identifies invalid timestamps for some historical records. Neither statement establishes a universal invalid-value rule for instantaneous Modbus measurements.12
Can an operational copy replace the instrument’s power-quality report?
No. Retain the instrument’s event recording, time synchronization, flagging and applicable conformity evidence for the intended power-quality assessment. An external monitoring series has its own sampling, transport and retention behavior.2
Are resets and remote outputs included?
No. The Modbus map includes writable functions for counters, resets and remote outputs. This guide reviews monitoring requirements only and authorizes none of those operations.1

Sources

  1. LINAX PQx000 Modbus interface (opens in a new tab) (PDF) Camille Bauer Metrawatt AG
  2. LINAX PQx000 device handbook (opens in a new tab) (PDF) Camille Bauer Metrawatt AG

Further reading

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