6AG1138-6AA00-2BA8

**6AG1138-6AA00-2BA8** 

**Data sheet** 

SIPLUS ET 200SP WP321 based on 7MH4138-6AA00-0BA0 with conformal coating, -40…+60 °C, electronic weighing system 1 channel for the connection of load cells DMS full bridges (1-4 mV/V) for SIMATIC ET200SP, suitable for BU type A0, RS485 interface for SIWATOOL or remote display. 

|**General information**||
|---|---|
|Product type designation|TM SIWAREX WP321 ST|
|Firmware version||
|● FW updatepossible|Yes|
|based on|7MH4138-6AA00-0BA0|
|usable BaseUnits|BU type A0|
|Color code for module-specific color-coded label|CC00|
|Product function||
|● I&M data|Yes; I&M0 to I&M3|
|● Isochronous mode|No|
|● Adjustment of measuringrange|No|
|Engineeringwith||
|● STEP 7 TIA Portal configurable/integrated from version|see entryID: 109746275|
|**Supply voltage**||
|Rated value(DC)|24 V|
|Load voltage L+||
|● Rated value(DC)|24 V|
|●permissible range, lower limit(DC)|19.2 V|
|●permissible range, upper limit(DC)|28.8 V|
|● Short-circuitprotection|Yes|
|● Reverse polarityprotection|Yes|
|**Input current**||
|Current consumption, max.|100 mA|
|**Encoder supply**||
|Output voltage(DC)|4.85 V|
|Short-circuit protection|Yes|
|**Power**||
|Power consumption from the backplane bus|70 mW|
|**Power loss**||
|Power loss, typ.|2 W|
|**Address area**||
|Address spaceper module||
|● Inputs|16 byte|
|● Outputs|16 byte|
|**Hardware configuration**||
|Automatic encoding|Yes|
|● Mechanical codingelement|Yes|
|● Type of mechanical coding element|type B|



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|**Encoder**|**Encoder**|
|---|---|
|Connection of signal encoders||
|● For strain gauges (full bridges) with 4-conductor<br>connection|Yes|
|● For strain gauges (full bridges) with 6-conductor<br>connection|Yes|
|● Resistance of full bridge, min.|40 Ω; when using SIWAREX IS: 50 ohm for 7MH4710-5BA; 105 ohm when<br>using7MH4710-5CA|
|● Resistance of full bridge, max.|4 100 Ω|
|**Errors/accuracies**||
|Linearityerror(relative to input range),(+/-)|0.01 %|
|Error limit accordingto DIN 1319-1|0.05 %; of full-scale value|
|Temperature coefficient, zeropoint|≤ ±0.1μV/K|
|Temperature coefficient, span|≤ ±5ppm/K|
|Temperature coefficient, span, 4-wire connection (in relation to<br>end value)|≤ ±5 ppm/K|
|Temperature coefficient, span, 6-wire connection (in relation to<br>end value)|≤ ±10 ppm/K|
|**Interfaces**||
|Number of RS 485 interfaces|1; SIWATOOL V7 or SIWAREX DB or SIEBERT remote display|
|**1. Interface**||
|Interface types||
|● RS 485|Yes; 390 Ω, 220 Ω, 390 Ω connectable termination|
|**Interface types**||
|RS 485||
|● Transmission rate, max.|115.2 kbit/s|
|● Cable length, max.|1 000 m; ≤ 115 kbps, shielded cable|
|**Interrupts/diagnostics/status information**||
|Diagnostics function|Yes; Diagnostic alarm|
|Substitute values connectable|No|
|Alarms||
|● Diagnostic alarm|Yes; Parameterizable|
|● Hardware interrupt|Yes; Parameterizable|
|Diagnoses||
|● Monitoringthe supplyvoltage|Yes|
|● Wire break|Yes|
|● Short-circuit|Yes|
|● Grouperror|Yes|
|Diagnostics indication LED||
|● ERROR LED|Yes;green/red DIAG LED|
|● Monitoringof the supplyvoltage(PWR-LED)|Yes;green PWR LED|
|**Integrated Functions**||
|Counter|Yes|
|Load cell||
|● Non-automatic weighinginstrument|NAWI|
|● Samplingrate|600 Hz|
|● Resolution of input signal|±500 000partspro mV/V|
|● Common mode voltage, min.|0.25 V|
|● Common mode voltage, max.|4.75 V|
|● input resistance of signal line, typ.|4 MΩ|
|● input resistance of sense line, typ.|2 MΩ|
|● Cable length, max.|500 m; when usingthe SIWAREX 7MH4702-8AG cable|
|Measuringfunctions||
|Measuringrange||
|— -1 mV/V to +1 mV/V|Yes; corresponds to a resolution of ±500 000parts|
|— -2 mV/V to +2 mV/V|Yes; corresponds to a resolution of ±1 000 000parts|
|— -4 mV/V to +4 mV/V|Yes; corresponds to a resolution of ±2 000 000 parts|
|**Isolation**||
|Isolation tested with|707 V DC(type test)|
|**Standards, approvals, certificates**||



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||Suitable for safetyfunctions|No||
|---|---|---|---|
||**Ambient conditions**|||
||Ambient temperature duringoperation|||
||● horizontal installation, min.|-40 °C; = Tmin(incl. condensation/frost)||
||● horizontal installation, max.|60 °C||
||● vertical installation, min.|-40 °C; = Tmin(incl. condensation/frost)||
||● vertical installation, max.|50 °C||
||Altitude duringoperation relatingto sea level|||
||● Installation altitude above sea level, max.|5 000 m||
||● Ambient air temperature-barometric pressure-altitude|Tmin ... Tmax at 1 080 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax<br>- 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax - 20 K)<br>at 658 hPa ... 540 hPa(+3 500 m ... +5 000 m)||
||Relative humidity|||
||● With condensation, tested in accordance with IEC 60068-<br>2-38, max.|100 %; RH incl. condensation / frost (no commissioning in bedewed state),<br>horizontal installation||
||Resistance|||
||Coolants and lubricants|||
||— Resistant to commercially available coolants and<br>lubricants|Yes; Incl. diesel and oil droplets in the air||
||Use in stationaryindustrial systems|||
||— to biologically active substances according to EN<br>60721-3-3|Yes; Class 3B2 mold, fungus and dry rot spores (with the exception of fauna);<br>Class 3B3 on request||
||— to chemically active substances according to EN<br>60721-3-3|Yes; Class 3C4 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity<br>degree 3); *||
||— to mechanically active substances according to EN<br>60721-3-3|Yes; Class 3S4 incl. sand, dust, *||
||— Against mechanical environmental conditions acc.<br>to EN 60721-3-3|Yes; Class 3M8 using the SIPLUS Mounting Kit ET 200SP (6AG1193-6AA00-<br>0AA0)||
||Use on ships/at sea|||
||— to biologically active substances according to EN<br>60721-3-6|Yes; Class 6B2 mold, fungal and dry rot spores (excluding fauna)||
||— to chemically active substances according to EN<br>60721-3-6|Yes; Class 6C3 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity<br>degree 3); *||
||— to mechanically active substances according to EN<br>60721-3-6|Yes; Class 6S3 incl. sand, dust; *||
||— Against mechanical environmental conditions acc.<br>to EN 60721-3-6|Yes; Class 6M4 using the SIPLUS Mounting Kit ET 200SP (6AG1193-6AA00-<br>0AA0)||
||Usage in industrialprocess technology|||
||— Against chemically active substances acc. to EN<br>60654-4|Yes; Class 3 (excluding trichlorethylene)||
||— Environmental conditions for process, measuring<br>and control systems acc. to ANSI/ISA-71.04|Yes; Level GX group A/B (excluding trichlorethylene; harmful gas<br>concentrations up to the limits of EN 60721-3-3 class 3C4 permissible); level<br>LC3(salt spray)and level LB3(oil)||
||Remark|||
||— Note regarding classification of environmental<br>conditions acc. to EN 60721, EN 60654-4 and<br>ANSI/ISA-71.04|* The supplied plug covers must remain in place over the unused interfaces<br>during operation!||
||Conformal coating|||
||● Coatings for printed circuit board assemblies acc. to EN<br>61086|Yes; Class 2 for high reliability||
||● Protection against foulingacc. to EN 60664-3|Yes; Type 1protection||
||● Militarytestingaccordingto MIL-I-46058C, Amendment 7|Yes; Discoloration of coating possible duringservice life||
||● Qualification and Performance of Electrical Insulating<br>Compound for Printed Board Assemblies according to IPC-<br>CC-830A|Yes; Conformal coating, Class A||
||**Decentralized operation**|||
||to SIMATIC S7-300|Yes||
||to SIMATIC S7-400|Yes||
||to SIMATIC S7-1200|Yes||
||to SIMATIC S7-1500|Yes||
||to standard PROFIBUS master|Yes||
||to standard PROFINET controller|Yes||
||**Dimensions**|||
||Width|15 mm||
||Height|73 mm||



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|Depth<br>~~BC~~|58 mm|58 mm|58 mm|
|---|---|---|---|
|**Weights**||||
|Weight, approx.|30g|||
|**Classifications**<br>~~a~~||||
|eClass<br>eClass<br>eClass<br>eClass<br>eClass<br>eClass<br>eClass<br>ETIM<br>ETIM<br>ETIM<br>ETIM<br>IDEA<br>UNSPSC<br>~~a~~||**Version**<br>~~a~~|**Classification**<br>~~a~~|
|||14<br>12<br>9.1<br>9<br>8<br>7.1<br>6<br>10<br>9<br>8<br>7<br>4<br>15|27-24-26-05<br>27-24-26-05<br>27-24-26-05<br>27-24-26-05<br>27-24-26-05<br>27-24-26-05<br>27-24-26-05<br>EC001601<br>EC001601<br>EC001601<br>EC001601<br>3567<br>32-15-17-05|
|**Approvals / Certificates**<br>~~a~~||||
|**General Product Approval**<br>~~a~~||||



**last modified:** 

10/23/2025 

6AG11386AA002BA8 Page 4/4 

Subject to change without notice © Copyright Siemens 

5/21/2026