Plug-In Communications Module 7KM9300-0AB00-0AA0 7KM9 300-0AB00-0AA0 7KM93OO-OABOO-OAAO

Siemens 7KM9300-0AB00-0AA0 | SENTRON PAC PROFIBUS DP Expansion Module — Plug-In for 7KM PAC3200 / PAC4200 Energy Meters, 9-Pin Sub-D, 500V Isolation, IP20, 63×43×22mm

Overview

The Siemens 7KM9300-0AB00-0AA0 is the PROFIBUS DP expansion module for Siemens SENTRON PAC energy meters — specifically the 7KM PAC3200 and PAC4200 measuring devices. It transforms a standalone energy meter into a fully networked PROFIBUS DP slave, making all of the meter's measured parameters — voltage, current, power, energy, power factor, frequency, harmonics — available to any PROFIBUS DP master on the plant network.

The fundamental value proposition is simple: energy meters placed in power distribution panels, switchgear compartments, and motor control centres collect valuable electrical data. That data is only useful if it can reach the control system, energy management software, or SCADA platform that acts on it.

Without a communication interface, the meter displays its readings locally on its own display — readable only by a person standing in front of the panel. With the PROFIBUS DP module installed, all measured quantities flow continuously over the plant's PROFIBUS network to wherever they're needed.

The module installs as a plug-in directly into the PAC3200 or PAC4200's expansion slot — no additional mounting space, no separate power supply, no external wiring between the module and the meter.

The PAC3200's expansion architecture was designed with this modularity in mind: a single slot accepts either a PROFIBUS DP, PROFINET, Modbus RTU, or RS485 module, allowing the same meter hardware to serve different communication architectures by swapping the plug-in module.

Key Specifications

Cyclic Data Exchange — What Gets Transmitted Over PROFIBUS

The PROFIBUS DP protocol operates in a cyclic master-slave polling model: the DP master (typically a Siemens S7-300 or S7-400 CPU, or any PROFIBUS DP master controller) sends a request to the PAC3200's PROFIBUS module in each bus cycle, and the module responds with the currently measured data.

Through the GSDML configuration file loaded into the PROFIBUS master's hardware configuration, the engineer selects which measured quantities from the PAC3200 are included in the cyclic data frame.

The PAC3200 measures a comprehensive set of power quality parameters — three-phase voltages (L-L and L-N), three-phase currents, three-phase active, reactive, and apparent power, three-phase power factors, frequency, total active and reactive energy (import and export for four-quadrant metering), harmonic content, and demand values.

Not all of these need to be in every PROFIBUS message — the GSDML configuration allows selecting only what the control system actually needs, optimising the bus cycle utilisation.

The practical benefit of this selective configuration is bandwidth efficiency: a PROFIBUS network serving many PAC3200 meters (each with its own PROFIBUS module) does not need to transmit the full meter dataset from each node in every cycle — only the quantities actively used by the control system are included, leaving bus capacity for other devices.

Acyclic Data — DPV1 Access to the Full Parameter Set

Beyond the cyclic channel, the 7KM9300-0AB00-0AA0 supports acyclic data exchange through PROFIBUS DPV1 — the extended PROFIBUS DP protocol that allows reading and writing data records outside the cyclic scan. DPV1 is used for:

Configuration access: Reading and writing PAC3200 configuration parameters (CT ratios, VT ratios, measuring system configuration, alarm limits) from the PROFIBUS master without physical access to the meter's front panel.

Extended measurement data: Reading measured quantities that are not included in the cyclic channel — historical energy values, extended harmonic data, or less frequently needed parameters — on demand rather than every bus cycle.

Diagnostic data: The DPV1 channel carries device diagnostic information — module status, communication fault flags, and self-test results — that provides the PROFIBUS master with detailed health monitoring of the energy meter without interrupting the normal measurement cycle.

FAQ

Q1: Can the 7KM9300-0AB00-0AA0 module be used with the PAC4200's digital inputs and outputs over PROFIBUS?

Yes. When the PROFIBUS DP module is installed in a PAC4200 (which includes built-in digital inputs and outputs), the I/O status of those inputs and outputs is accessible via the PROFIBUS cyclic channel and via DPV1.

Control bytes in the cyclic channel allow the PROFIBUS master to control the PAC4200's digital outputs — for example, triggering a pulse output or switching a control relay — while the input status and all measured quantities are read back in the same cyclic frame.

Q2: How many 7KM PAC3200 meters with PROFIBUS modules can be connected to one PROFIBUS DP segment?

A standard PROFIBUS DP segment supports up to 32 stations (nodes) without a repeater. With repeaters, up to 126 slave addresses are available in a PROFIBUS DP network. Each PAC3200 with a PROFIBUS module occupies one slave address.

In practice, the number of meters on a single segment is limited by the bus cycle time requirement — the more slaves and the more data per slave, the longer each full scan cycle takes at the configured bus speed (typically 1.5 Mbit/s for mixed device networks).

Q3: What GSD file is required to configure the PAC3200's PROFIBUS module in STEP 7?

The PROFIBUS DP module requires the GSD file provided by Siemens for the 7KM PAC series. The GSD file defines the module's data format, cyclic data options (which measured quantities can be selected), and diagnostic capabilities.

The file is downloaded from Siemens Industry Online Support and imported into STEP 7's hardware catalog, after which the PAC3200 with PROFIBUS module appears as a configurable PROFIBUS DP slave in the HW Config interface.

The GSDML file supports individual selection of measured quantities for the cyclic channel to optimise bus bandwidth usage.

Q4: Is the -0AB00-0AA0 version directly interchangeable with the successor -0AB01-0AA0 module?

The -0AB01-0AA0 is the successor to the -0AB00-0AA0, extending compatibility to additional devices (PAC3220, 3VA COM100/800) beyond the PAC3200/PAC4200. From the PROFIBUS network perspective, both modules operate as PROFIBUS DP slaves with the same data interface.

Physically, both modules install in the same PAC expansion slot. However, the GSD/GSDML configuration may differ between revisions, and the STEP 7 / TIA Portal hardware configuration should be verified when substituting one for the other in an existing project.

Q5: Can the PROFIBUS module and the PAC3200's built-in display operate simultaneously?

Yes. The PROFIBUS DP module and the PAC3200's local display and front-panel keypad operate independently and simultaneously.

While measured data is transmitted over PROFIBUS in real time, the meter's local display continues showing its normal measurement screens — voltage, current, power, energy — and the front panel buttons remain functional for local parameter changes.

Installing the PROFIBUS module does not disable or modify any local operation capability of the PAC3200.