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SINAMICS G120 PM240-2: Installation, Wiring, and Technical Specifications Guide

PM240-2 IP20 · 400V: 0.55…250 kW · Frame Sizes FSA…FSG · Integrated Braking Chopper

1. Power Module Overview

The PM240-2 belongs to the modular family of SINAMICS G120 converters. A modular converter comprises a Control Unit and a Power Module. Depending on the power rating, the PM240-2 is supplied in frame sizes FSA through FSG.

The PM240-2 product range covers four voltage classes:

• 1 AC 200 V: 0.55 kW to 4 kW, for line voltages from 1 AC 200 V to 240 V
• 3 AC 200 V: 0.55 kW to 55 kW, for line voltages from 3 AC 200 V to 240 V
• 3 AC 400 V: 0.55 kW to 250 kW, for line voltages from 3 AC 380 V to 480 V
• 3 AC 690 V: 11 kW to 250 kW, for line voltages from 3 AC 500 V to 690 V

This guide focuses on the 400V 3AC variants in detail. The 200V and 690V variants are covered at the article-number level only.

Source: Chapter 2 (Introduction), PM240-2 Hardware Installation Manual, p. 17

LO vs. HO Rating

General Data — 400V Converters

The following general specifications apply to all 400V PM240-2 power modules (Section 6.6.1 of the Hardware Installation Manual).

Source: Section 6.6.1, PM240-2 Hardware Installation Manual, pp. 86–87

2. Mounting & Clearances

Install the PM240-2 vertically with the motor connectors facing downward. Only vertical mounting with connectors at the bottom is admissible — do not mount the drive horizontally or at an angle. Protect the device by installing it in a control cabinet with degree of protection IP54 according to IEC 60529 or NEMA 12.

Installation Sequence — FSA through FSC

1. Prepare the cabinet. Verify the panel area is flat, can accept the required fasteners, and meets the minimum clearances listed below.
2. Mount the shield plates. The lower shield plate is included in the converter accessory kit and provides strain relief for the line and motor cables as well as shield support for the motor cable. The top shield plate is not supplied with the converter — it is required only when connecting an external braking resistor.
3. Install the Power Module using the specified screws and torque (see table below).
4. Install the Brake Relay (if required). If using a motor holding brake, install the Brake Relay next to the converter.

Installation Sequence — FSD through FSG

1. Prepare the cabinet.
2. If using a Brake Relay or Safe Brake Relay: Install the Brake Relay on the rear side of the shield plate.
3. Mount the shield plates.
4. Install the Power Module.

Source: Section 3.4.1, PM240-2 Hardware Installation Manual, p. 33

Dimensions — FSA through FSC (Table 3-1)

Note: Depth with CU230P-2 is 224 mm for all three frame sizes (with SINAMICS G120 Smart Access plus 9 mm; with blanking cover or with Operator Panel plus 11 mm).

Dimensions — FSD through FSG (Table 3-3)

Note: Depth with CU230P-2 is 253 mm for FSD/FSE and 373 mm for FSF/FSG.

Source: Tables 3-1 and 3-3, PM240-2 Hardware Installation Manual, pp. 34–35

Drilling Dimensions, Clearances and Fixing (Tables 3-2 and 3-4)

3. Power Wiring

Frame sizes FSA through FSC use withdrawable plug connectors with screw terminals that cannot be inadvertently interchanged between line and motor positions. Press the red release lever on each connector to remove it from the PM housing for wire insertion. Frame sizes FSD through FSG use screw-type terminals accessed by removing the connection covers. For FSF and FSG, the openings from the connection cover for the power connections must be broken out using side cutters or a fine saw blade.

Power Terminal Assignments — FSA through FSC

Power Terminal Assignments — FSD through FSG

FSD through FSG converters have the same terminal designations (L1, L2, L3, PE, U2, V2, W2) but add dedicated DC link terminals:

Source: Section 4.2.4, Figures 4-3 through 4-6, PM240-2 Hardware Installation Manual, pp. 51–58

Connection Specifications by Frame Size (Table 4-5)

Note: FSF and FSG line/motor connections require cable lugs according to SN71322 for M10 bolts. FSE, IP20 — only use cables certified for temperatures of 75 °C to connect the braking resistor. 16 mm² is allowed for short-time duty on FSD braking resistor connections.

Source: Table 4-5, PM240-2 Hardware Installation Manual, p. 56

Power Wiring Procedure (FSA…FSC)

1. Ensure the device is in a no-voltage condition and the DC link is discharged. Wait at least 5 minutes after disconnecting power. Verify zero voltage at all power terminals with a calibrated meter.
2. Attach cable tie holders to the Power Module before establishing connections.
3. Connect the 3-phase line supply to terminals L1, L2, and L3.
4. Connect the protective earth conductor to the PE terminal. This connection is mandatory. For line or motor feeder cables ≤ 16 mm², the PE conductor cross-section must equal the feeder cable cross-section. For cables 16–35 mm², minimum PE is 16 mm². For cables > 35 mm², minimum PE is ½ the cable cross-section.
5. Connect the motor leads to terminals U2, V2, and W2.
6. Fix the line cable with a cable tie at position 1 on the PM body.
7. Fix the motor cable shield with the hose clamp at position 2 on the shield plate.
8. Connect the control cable shield to the CU shield plate using a steel band at position 3.
9. Attach the control cable to the PM body with a cable tie at position 4.

Source: Sections 4.2 and 4.1.4, PM240-2 Hardware Installation Manual, pp. 48–57

4. Motor Connection

Motor connections are made at the bottom terminals U2, V2, and W2 (FSA…FSC plug connector; FSD…FSG screw terminals behind the lower cover). For 400V Power Modules, induction motors are permissible in the range from 25% to 150% of the converter power without any restrictions. Only use motors that are suitable for operation with converters with a DC link.

Motor Star / Delta Connection

Maximum Motor Cable Lengths — FSA through FSC (Table 4-1)

Notes on Table 4-1:

• For a low-capacitance motor cable: FSA allows 150 m, FSB and FSC allow 100 m in the "External C1 filter" configuration.
• 150 m applies for voltages 380…415 V; reduce to 100 m for voltages 440…480 V in the output reactor configurations.
• 225 m applies for voltages 380…415 V; reduce to 150 m for voltages 440…480 V.
• Always dimension the motor cable so that ohmic losses are less than 5% of the converter power rating.
• Values are for high-quality cables (CY100 or similar) at the factory-set pulse frequency.

Maximum Motor Cable Lengths — FSD through FSG

Source: Tables 4-1 through 4-4, PM240-2 Hardware Installation Manual, pp. 54–55

5. Braking Resistor Connection

The PM240-2 includes an integrated braking chopper. During braking of the motor and the load, excess energy is fed back to the converter, causing the voltage to rise in the DC link. The converter transfers the excess energy to the externally mounted braking resistor. Connect an external braking resistor to the R1 (DCP/R1 for FSA…FSC) and R2 terminals.

Braking Resistor Wiring

1. Install the top shield plate. The top shield plate is not supplied with the converter — it must be ordered separately. It is required only when connecting an external braking resistor and provides shield support for the braking resistor cable.
2. Connect the braking resistor between terminals DCP/R1 and R2 on the power module (FSA…FSC) or between R1 and R2 (FSD…FSG). Use shielded cable for the braking resistor connection. Maximum cable length without integrated connection cable is 10 m.
3. Ground the braking resistor enclosure directly to the control cabinet grounding bar. The braking resistor must not be grounded using the PE terminal of the converter.
4. If the braking resistor includes a thermoswitch: connect the thermoswitch contacts T1 and T2 to a free digital input on the Control Unit (e.g., DI 3). Configure that digital input as an external fault (parameter p2106 = 722.3) to shut down the drive if the resistor overheats.
5. Mount the braking resistor on a heat-resistant surface with high thermal conductivity. Do not cover the ventilation openings. Maintain clearances of at least 250 mm on all sides and 1000 mm above and below for FSA…FSC resistors. FSG braking resistors are freestanding only with at least 200 mm clearance on each side.
6. When using a braking resistor, ensure that the braking power has been set in parameter p0219.

Braking Resistor Data for 400V Converters (Table 8-5/8-6)

Source: Section 8.7.3, PM240-2 Hardware Installation Manual, pp. 134, 139

6. Technical Specifications — 6SL3210-1PE12-3UL1

The following specifications apply to the 6SL3210-1PE12-3UL1 (PM240-2, FSA, 0.75 kW LO, 400V, without integrated line filter). All values are taken from the Siemens product datasheet (generated 04/2026) and Table 6-8 of the PM240-2 Hardware Installation Manual (09/2023).

Source: Siemens product datasheet for 6SL3210-1PE12-3UL1 (generated 04/2026, 2 pages) and Table 6-8, PM240-2 Hardware Installation Manual, p. 88

7. 400V PM240-2 Article Number Reference

The following table lists all 400V PM240-2 power modules by frame size, with LO base load output power and LO base load output current. Article numbers are shown for variants without and with integrated line filter. Data from the article number overview in Chapter 2 of the PM240-2 Hardware Installation Manual.

Note: FSG converters use C3 filter class (suffix “-xCLx”) or C2 filter class (suffix “-xALx”) rather than the simple filtered/unfiltered distinction of smaller frame sizes.

Source: Article number overview, PM240-2 Hardware Installation Manual, p. 18

Ambient Conditions (Section 6.2)

Source: Section 6.2, PM240-2 Hardware Installation Manual, p. 75

Converter Service Life (Section 6.3)

The PM240-2 is designed for a service life of 10 years under the following conditions:

• Nominal load at 40 °C: 4000 h/y
• Idle time or standby at 20 °C: 4000 h/y
• Power off: 760 h/y

The minimum interval between starting operations (applying line voltage to a de-energized converter) is 120 seconds.

Under the following load circumstances, the Power Module will have a reduced service life due to excessive temperature rise of the integrated power semiconductors: large current fluctuations, long short-circuit or overload duration, and frequent occurrences of overload. To extend service life, Siemens recommends lowering the rated load, reducing the maximum current, reducing overload occurrences, and using an input signal to start/stop the converter rather than cycling line voltage.

Source: Section 6.3, PM240-2 Hardware Installation Manual, pp. 73, 77

Weight Summary by Frame Size — 400V (Tables 6-8 through 6-16)

Source: Tables 6-8 through 6-15, PM240-2 Hardware Installation Manual, pp. 88–92

8. Related Guides

Reference Documentation

The following Siemens publications were used as the source for all technical data in this guide. No specifications were generated from AI memory — every value was extracted from and verified against these documents.