VFD vs Servo Drive: Key Differences
A side-by-side comparison of VFD and servo drive motor type, feedback, dynamic response, overload rating, cost, and applications for industrial engineers.
The Siemens 6BK1136-6AB01-0CU0 is the F-TM ServoDrive HF drive controller module for the SIMATIC ET 200SP distributed I/O system, designed for servo and stepper motors operating in safety low-voltage environments. It accepts a 24 to 48 V DC bus (16.8–57.6 V range), delivers a 5 A rated output with a 15 A peak, and integrates hardwired STO (Safe Torque Off) for functional-safety applications without an additional safety relay.
The 5 A rated current (15 A instantaneous peak) targets small-frame servo and stepper motors in the sub-300 W range — typical candidates include SIMOTICS S-1FK2 and compact stepper actuators powered from a 24 V or 48 V PELV bus. The 3:1 peak-to-rated ratio supports short-duration acceleration torque without thermal derating at steady state. Hardwired STO (antivalent dual-channel 24 V DC) satisfies functional-safety stop-category requirements without an external safety relay, reducing panel footprint compared to a standard TM ServoDrive paired with an F-DQ relay. The BiSS-C encoder interface enables single-cable absolute-position feedback at 599 Hz output frequency, sufficient for most positioning axes in the ET 200SP backplane. If the application demands higher continuous torque (above 5 A RMS) or ground-fault monitoring, step up to a higher-rated ServoDrive variant; if STO is to be handled via PROFIsafe over the backplane rather than hardwired, the non-HF F-TM ServoDrive is the correct selection.
| Output: Rated current | 5A |
|---|---|
| Output: Max. output current | 15 A |
| Operating voltage (DC) | 24/48 V (16.8 ... 57.6 V) |
|---|---|
| Output frequency | 599 Hz |
| Active power consumption | 300 W (At 50 V) |
| Insulation | DC 850 V, type test (between backplane bus, DC input and functional grounding) |
| Overvoltage category | III |
| Product function: I&M data | 1 |
|---|---|
| Product function: Isochronous mode | 1 |
| Product function: Four-quadrant operation | 1 |
| Product function: Speed control with encoder | 1 |
| Product function: Safety Functions | 1 (Drive controller with hardwired STO) |
| Protection function: Undervoltage protection | 1 |
| Protection function: Overvoltage protection | 1 |
| Protection function: Overload protection | 1 |
| Protection function: Ground-fault protection | 0 |
| Protection function: Short-circuit protection | 1 |
| Part number | 6BK1136-6AB01-0CU0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| EAN | 4034106459406 |
| Standard digital inputs: Number | 1 (input for message signal) |
|---|---|
| Fail-safe digital inputs: Number | 1 (For STO, antivalent (2-pin) - 24 V DC) |
| Encoder types: Incremental encoder (symmetrical) | 1 (up to 500 Hz per channel) |
|---|---|
| Encoder interface: Number | 1 |
| Encoder interface: 5V | 1 |
| Encoder interface: Short-circuit protection | 1 |
| Encoder interface: Max. output current | 150 mA |
| Alarms: Diagnostic alarm | 1 |
|---|---|
| Alarms: Hardware interrupt | 0 |
| Diagnoses: Monitoring the supply voltage | 1 |
| Diagnoses: Wire-break | 1 |
| Diagnoses: Short-circuit | 1 |
| Diagnoses: Group error | 1 |
| Diagnostics indication LED: RUN LED | 1 |
| Diagnostics indication LED: ERROR LED | 1 |
| Installation altitude, max. | 3,000 m |
|---|---|
| Pollution degree | 2 according to EN 61800-5-1 |
| Ambient temperature during: Operation (horizontal installation) | -30 ... 60 °C |
| Ambient temperature during: Operation (vertical installation) | No condensation, splash water, icing, salt spray or oil mist permitted. Note the derating data! -30 ... 50 °C |
| Ambient temperature during: Transport | No condensation, splash water, icing, salt spray or oil mist permitted. Note the derating data! -30 ... 70 °C |
| Ambient temperature during: Storage | -30 ... 70 °C |
| Shielded | 10 m |
|---|
| Degree of protection | IP20 |
|---|---|
| Type of ventilation | Convection cooling |
| Brake design | holding brake control via the process image |
| Braking chopper | 1 |
| Dimensions: Width | 20 mm |
| Dimensions: Height | 73 mm |
| Dimensions: Depth | 58 mm |
| Certificate of suitability | CE / cULus / RCM / KC / EAC / UKCA / RoHS / China-RoHS-Conformity |
|---|---|
| Verification of suitability for fail- | SIL 3 acc. to IEC 61508 (2010) and IEC 61800-5-2 (2016), PL d according to EN |
| safety | ISO 13849-1 (2023), Category 3 acc. to |
| Page 1 of 1 | EN ISO 13849-1 (2023) Generated Sun Nov 1 01:19:52 CET 2026 |
| Net weight | 0.055 kg |
|---|---|
| Shipping weight | 0.573 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of 6BK1136-6AB01-0CU0 is 5 A.
The rated operational voltage of 6BK1136-6AB01-0CU0 is 24–48 V DC.
The rated motor power of 6BK1136-6AB01-0CU0 is 0.3 (300 W at 50) kW.
The tariff (HS) code on file for 6BK1136-6AB01-0CU0 is 85044087.
The EAN (GTIN) of 6BK1136-6AB01-0CU0 is 4034106459406.
6BK1136-6AB01-0CU0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
A side-by-side comparison of VFD and servo drive motor type, feedback, dynamic response, overload rating, cost, and applications for industrial engineers.
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