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

Siemens 7KM9300-0AB00-0AA0 | SENTRON PAC PROFIBUS DP Module — Plug-In for PAC3200 / PAC4200 / 9-Pin Sub-D / 500V Isolation / DPV1 / IP20

From Local Display to Plant Network in One Plug-In Module

The SENTRON PAC3200 and PAC4200 measure everything relevant about the electrical circuit they're monitoring — three-phase voltages, currents, active and reactive power, power factor, frequency, harmonics, energy import and export, demand values. Without a communication interface, all these measurements are visible only on the meter's own display. The 7KM9300-0AB00-0AA0 changes that: it plugs directly into the PAC meter's expansion slot, adds the PROFIBUS DP interface, and puts every measured parameter on the plant network — accessible to any PROFIBUS DP master in each bus cycle.

No additional mounting space. No external power wiring. No separate cable between the module and the meter. The PAC3200's expansion slot was designed for exactly this plug-in architecture — a single slot accepting PROFIBUS DP, PROFINET, Modbus RTU, or RS485 modules interchangeably, giving the same meter hardware the ability to serve different plant communication environments by module swap alone.

Key Specifications

Cyclic Data — Selected Measurements Every Bus Scan

PROFIBUS DP operates on a cyclic polling model: the DP master requests data from each slave in every bus cycle, and the PAC3200's PROFIBUS module responds with the currently measured values. The measurements included in each cyclic response are configured through the GSD file in STEP 7's hardware configuration — the engineer selects only the parameters the control system actively uses, keeping the cyclic data frame compact and the bus cycle efficient.

In a switchgear panel with ten PAC3200 meters each carrying a PROFIBUS module, transmitting the full parameter set from every meter in every bus scan would consume significant bus bandwidth. Configuring each meter to transmit only its three-phase active power, total energy, and one alarm flag keeps each slave's contribution to the cycle time minimal, leaving bus capacity for the PLCs and I/O stations sharing the same segment.

DPV1 Acyclic Access — Configuration and Extended Data on Demand

Beyond the cyclic channel, the module supports PROFIBUS DPV1 acyclic data exchange. DPV1 allows the DP master to read or write data records outside the normal polling cycle, used for:

Remote configuration: Reading and writing PAC3200 parameters — CT ratios, VT ratios, alarm limits, measuring system configuration — from the PROFIBUS master without physical access to the meter panel. In large electrical installations with meters in inaccessible switchgear compartments, remote parameterisation through DPV1 eliminates the need to physically reach each meter for routine configuration changes.

Extended measurements: Reading harmonic data, historical energy values, or demand records that are too large for the cyclic channel but needed periodically for reporting or energy management calculations.

Diagnostics: Device health status, communication fault flags, and self-test results, giving the control system detailed meter status information.

FAQ

Q1: Can the PROFIBUS module access the PAC4200's digital inputs and outputs?

Yes. The PAC4200's onboard digital I/O is accessible via the cyclic PROFIBUS channel and via DPV1. Control bytes in the cyclic channel allow the PROFIBUS master to activate the PAC4200's digital outputs (pulse outputs, control relays), while input status is read back in the same frame alongside measurement data.

Q2: How many PAC3200 meters with PROFIBUS modules can share one PROFIBUS segment?

A PROFIBUS DP segment supports up to 32 nodes without a repeater (up to 126 with repeaters). Each PAC3200 occupies one address. The practical limit per segment is determined by bus cycle time — more meters and more data per meter lengthens the cycle at any given baud rate (typically 1.5 Mbit/s for mixed networks). Selective cyclic data configuration (transmitting only needed parameters) improves the number of meters supportable at a given cycle time target.

Q3: What GSD file is needed to configure this module in STEP 7?

The Siemens GSD file for the 7KM PAC series, downloaded from Siemens Industry Online Support, defines the module's cyclic data format and selectable parameters. Import it into STEP 7's hardware catalog, after which the PAC3200 with PROFIBUS module appears as a standard configurable PROFIBUS DP slave in HW Config. The GSD supports individual selection of measurement quantities for the cyclic channel.

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

The -0AB01-0AA0 successor extends compatibility to additional meters (PAC3220, 3VA COM100/800) beyond the PAC3200/PAC4200. Both versions physically install in the same expansion slot and operate as PROFIBUS DP slaves with the same data interface. However, the GSD/GSDML configuration may differ between versions; verify the hardware configuration in STEP 7 or TIA Portal when substituting in an existing project.

Q5: Does the local PAC3200 display continue working after the PROFIBUS module is installed?

Yes — the local display and front-panel keypad operate independently and simultaneously with the PROFIBUS module. Measured values continue appearing on the display, and front-panel buttons remain functional for local parameter access. The PROFIBUS module adds network communication without disabling any local functionality of the PAC3200.