Does every UMG 96-PQ-L meet Class S?

No. The manual lists standard and Class S order references separately. Verify the actual reference and the applicable IEC 61000-4-30 claim; a family name or a successful Modbus read does not establish that classification.

Does the base meter have Ethernet?

The base device’s documented connection is RS-485. The manual shows Ethernet through an expansion module. Check the installed hardware before selecting a TCP collection path.

Can I reuse an LP sensor configuration?

No. Low-power sensor inputs and conventional 1 A/5 A CT inputs are different hardware arrangements. This guide covers the conventional CT-input base meter.

Why can a different format need different scaling?

The map offers several representations. Its general notes distinguish instantaneous Float and short formats, while individual energy tables can add their own ratio and unit rules. Read the definition of the selected entry rather than multiplying every value by the CT ratio.

Janitza UMG 96-PQ-L: Modbus setup guide

Compatibility

Compatible through Modbus RTU

Janitza documents a local RS-485 measurement interface with the functions, address and data format used in this read-only setup.

UMG 96-PQ-L base device, using the October 2024 manual for firmware 3.55 and higher and October 2023 map for firmware 3.50 and higher. This procedure targets their overlapping firmware scope, 3.55+. LP sensor-input models and expansion-module endpoints need separate matching documents.

Connect it with

Modbus Interface ZMB-3X
From €399 ex VAT Configure Modbus Interface
Gateway ZGW-20
From €899 ex VAT Configure Gateway

For the analyser’s own documented server interface

Modbus
Edge
Platforms

Match the installed address, baud rate and framing. Use FC04 for the bounded read below. Record the device identity and configured measurement ratios before collecting totals. The customer-platform output is optional; Edge remains the local system of record.

Models

Download

Models	Interface	Route into Edge
UMG 96-PQ-L standard / Class S	CT-input base device, RS-485	Select the complete reference for supply and network topology; Class S is variant-specific.
UMG 96-PQ-L with Ethernet module	Expanded device configuration	Confirm the installed module and its separate interface documentation before using TCP.
UMG 96-PQ-L-LP	Different sensor-input scope	Do not apply the CT-input wiring or ratio assumptions from this guide.

Specifications

UMG 96-PQ-L combines a front-panel display, external current-transformer inputs and local recording in a 96 × 96 mm instrument. That makes it a different selection from a DIN-rail meter hidden inside a panel: the local display is available for commissioning and routine inspection, while the memory supports a separate historical-data workflow. The base device provides RS-485. Ethernet shown in an expanded system depends on an installed module; it is not a port to assume on every base meter.¹

Installation: 96 × 96 mm front-panel instrument; indoor or weather-protected cabinet¹
Selected example order references: 5236001: TN/TT, 230 V supply, standard; 5236021: corresponding Class S version¹
Current inputs: External ../1 A or ../5 A CTs; separate LP variants are outside this guide¹
Base interface: RS-485 Modbus RTU; Ethernet requires the appropriate expansion module¹
Memory and I/O: 64 MB flash; three digital inputs, three digital outputs and one 0–20 mA analogue output¹
Operating temperature: -10 to +55 °C in the cited manual¹
Selected read: FC04, literal address 19000, two-register Float in V²
Byte-order banks: Printed addresses use big-endian data; add 32768 for the little-endian copy.²

Interface

Documented measurements and integration boundaries for UMG 96-PQ-L.

Instantaneous phase voltage and current with the configured measurement ratios.
Signed active power and separately identified energy counters.
Model-specific power-quality quantities, distinct from archived event records.
A physical measurement channel and timestamp retained with every collected value.

Assessment

UMG 96-PQ-L base device, using the October 2024 manual for firmware 3.55 and higher and October 2023 map for firmware 3.50 and higher. This procedure targets their overlapping firmware scope, 3.55+. LP sensor-input models and expansion-module endpoints need separate matching documents.

InteroperabilitySupported with conditions: The model-specific manual and map define an open serial measurement path; firmware and interface role must match.^1, 2
AccuracySupported with conditions: The manual defines measurement inputs and capability boundaries. Transformer selection, variant and installation remain part of system accuracy.^1, 2
SecurityNot yet assessed: No authenticated or encrypted telemetry claim is established for this RS-485 path.^1, 2
ReliabilityNot yet assessed: Local recording is described, but continuous end-to-end collection and automatic historical backfill are not established.^1, 2
RuggednessSupported with conditions: The manual states an indoor/cabinet installation and -10 to +55 °C operating range; this is not an outdoor enclosure claim.^1, 2
ScalabilitySupported with conditions: Addressed serial polling and documented register banks permit integration, while actual bus capacity depends on configuration and response timing.^1, 2
LifecycleNot yet assessed: Public documentation is retained, without a stated product support lifetime.^1, 2

Setup

Read L1-N voltage

The exact model’s address list places L1-N voltage at decimal 19000 as Float in V. The selected instantaneous float includes configured transformer factors.

Read PDU: 04 4A 38 00 02: FC04, address 19000, quantity 2.
Synthetic decoder payload: 43 66 00 00 decodes as big-endian IEEE754 float32 to 230.0 V.
Alternate bank: 19000 + 32768 = 51768 (0xCA38) gives the documented little-endian representation.
Scaling: Use the selected Float’s stated engineering unit. Do not apply the configured transformer ratio twice.

Acceptance: These bytes are an independent synthetic decoder example, not a device capture. Verify actual identity, complete response width, selected byte-order bank and agreement with the measurement reference before accepting the reading.

Identify the exact instrument
UMG 96-PQ-L base device, using the October 2024 manual for firmware 3.55 and higher and October 2023 map for firmware 3.50 and higher. This procedure targets their overlapping firmware scope, 3.55+. LP sensor-input models and expansion-module endpoints need separate matching documents.
Verify the measuring configuration
Check the installed voltage and current transformer ratios, wiring system and phase association. The selected instantaneous Float readings include transformer factors; do not transfer that assumption to every integer energy or alternate-format table.
Match the serial role and framing
Read the configured Modbus address, baud rate and serial framing. Confirm that the connection reaches this instrument, not an unintended downstream unit.
Read the complete documented quantity
Read FC04 at decimal 19000 (0x4A38), quantity 2, for L1-N voltage. Use the printed big-endian bank with a matching Float32 decoder. These are literal map addresses: do not subtract one.
Prove the measurement before expanding
Compare the result with the instrument or a suitable simultaneous reference. Check phase and power direction under a known operating condition, then add documented points with their own widths and units. Keep missing/stale readings separate from zero. Recorded events require a separate retrieval path.

Common questions

Does every UMG 96-PQ-L meet Class S?: No. The manual lists standard and Class S order references separately. Verify the actual reference and the applicable IEC 61000-4-30 claim; a family name or a successful Modbus read does not establish that classification.¹
Does the base meter have Ethernet?: The base device’s documented connection is RS-485. The manual shows Ethernet through an expansion module. Check the installed hardware before selecting a TCP collection path.¹
Can I reuse an LP sensor configuration?: No. Low-power sensor inputs and conventional 1 A/5 A CT inputs are different hardware arrangements. This guide covers the conventional CT-input base meter.¹
Why can a different format need different scaling?: The map offers several representations. Its general notes distinguish instantaneous Float and short formats, while individual energy tables can add their own ratio and unit rules. Read the definition of the selected entry rather than multiplying every value by the CT ratio.²

Related devices

Sources

UMG 96-PQ-L user manual and technical data (opens in a new tab) (PDF) Janitza
UMG 96-PQ-L Modbus address list and formulary (opens in a new tab) (PDF) Janitza

Cookie	Kept for	What it does
`_ga`	13 months	Tells one browser apart from another across visits
`_ga_<id>`	13 months	Keeps the current visit together
`_clck`	1 year	Tells one browser apart from another across visits
`_clsk`	1 day	Joins the pages of one visit into one recording
`MUID`	1 year	Set by Microsoft on clarity.ms to recognise the browser

Cookie	Kept for	What it does
`li_fat_id`	30 days	Links a visit to the LinkedIn advert click that led to it
`bcookie`	1 year	Set by LinkedIn on linkedin.com to recognise the browser
`lidc`	1 day	Set by LinkedIn on linkedin.com to route requests
`UserMatchHistory`	30 days	Set by LinkedIn on linkedin.com to match visits for advertising
`AnalyticsSyncHistory`	30 days	Set by LinkedIn on linkedin.com to record when it last matched visits