Festo CMMT-AS-C18-11A-P3-MP-S3 – Servo Drive | 18A, 400V 3-Phase | Murali Pneumatics Coimbatore

Festo CMMT-AS-C18-11A-P3-MP-S3 Servo Drive – Overview

The CMMT-AS-C18-11A-P3-MP-S3 is part of Festo's CMMT-AS servo drive family — a platform engineered for precise, dynamic motion control in industrial automation. With an 18A nominal phase current, 54A peak capability, and a nominal controller output of 9 kVA, this drive is suited to servo axes that demand fast dynamic response, high torque accuracy, and absolute positioning. What sets the CMMT-AS series apart is its multi-protocol fieldbus design: a single drive variant handles EtherCAT, PROFINET IRT/RT, EtherNet/IP, and Modbus/TCP — eliminating the need to stock protocol-specific SKUs. The integrated functional safety package, certified to SIL 3 and PL e (Cat. 4) by TÜV Rheinland, covers seven safety sub-functions, removing the need for external safety modules on most machine designs.

Key Features

• Multi-protocol fieldbus in one device — EtherCAT, PROFINET IRT/RT, EtherNet/IP, and Modbus/TCP supported simultaneously; no firmware swaps or hardware variants needed across different machine generations.
• Wide input voltage range (200–480V AC) — compatible with both European 400V and North American 480V supply standards; suitable for export machinery built in Coimbatore or for multi-region OEMs.
• 18A nominal / 54A peak (2-second burst) — handles high-inertia loads and aggressive acceleration profiles without thermal limiting during normal production cycles.
• SIL 3 / PL e (Cat. 4) integrated safety — STO, SS1, SS2, SBC, SLS, SOS, and SMS all onboard; reduces panel BOM by eliminating external safety relays on STO-only designs.
• Universal encoder interface — supports BiSS-C, EnDat 2.1/2.2, Hiperface, SIN/COS, incremental, and Nikon encoders; works with the full range of Festo EMMT and third-party servo motors without adapter hardware.
• Built-in mains filter and integrated brake resistor (24Ω, 1200 Ws pulse) — reduces panel footprint and external component count; external resistor port available for higher regenerative duty cycles up to 4500W continuous.
• 24-bit position resolution at 16 kHz sampling rate — cascade control architecture (position / speed / current) with vector modulation delivers smooth, precise motion down to the sub-micron level on ballscrew and linear axes.
• I/O-rich design — 12 digital inputs (2 high-speed, 1µs), 6 digital outputs, 1 analogue ±10V setpoint input, 1 floating relay output; configurable for real-time capture and trigger tasks without a separate I/O module.
• Active autotuning and profile operating modes — reduces commissioning time on new axes; supports direct mode, record mode, interpolated CSP/CST/CSV, synchronised operation, and homing sequences via fieldbus.
• IP20, TÜV-certified, CE, UL, RCM, and KC marked — covers regulatory requirements across Indian, Australian, US, and Korean markets from a single product variant.

Technical Specifications

Parameter	Value
Festo Part Number	8166886
Product Type	Servo Drive
Series	CMMT-AS
Type of Mounting	Mounting plate, attached with screws
Mounting Position	Vertical (open convection)
Product Weight	4300 g
Display	Green / Yellow / Red LED
Optional Operator Unit	CDSB (ordered separately)
Nominal Operating Voltage AC	400 V (3-phase)
Input Voltage Range AC	200 V – 480 V
Permissible Voltage Fluctuation	±10%
Mains Frequency	48 Hz – 62 Hz
Mains Types Supported	TN, IT
Nominal Current, Load Supply	22 A
Peak Current, Load Supply	66 A
Nominal Current per Phase (effective)	18 A
Peak Current per Phase (effective)	54 A
Max. Peak Current Duration	2 s
Controller Nominal Output	9000 VA (9 kVA)
Maximum Output	27000 VA (27 kVA)
Output Frequency Range	0 Hz – 599 Hz
Output Voltage Class AC	3 × (0 – input) V
Nominal Voltage, Logic Supply DC	24 V
Logic Supply Voltage Range	±20%
Logic Current (no brake)	0.7 A
Logic Current (with parking brake)	3 A
Logic Current (brake + I/O max.)	3.5 A
Nominal Load Voltage DC	560 V
Max. Intermediate Circuit Voltage DC	800 V
System Voltage (EN 61800-5-1)	300 V
Max. Short Circuit Current Rating	10 kA
Active PFC	No
Mains Filter	Built-in
Brake Resistor, Integrated	24 Ω
Pulse Power, Brake Resistor	24 kVA
Pulse Energy, Brake Resistor	1200 Ws
Nominal Power, Brake Resistor (IEC)	100 W
External Brake Resistor Range	30 Ω – 40 Ω
Max. Continuous Output, External Brake Resistor	4500 W
Max. Holding Brake Output Current	2.3 A
Max. Voltage Drop (Logic to Brake Output)	1 V
Max. Motor Cable Length (no external filter)	50 m
PWM Frequency	8 kHz or 16 kHz
Sampling Rate	16 kHz
Position Resolution	24 bit/rev
Controller Operating Modes	P position, PI speed, PI current (F/M); profile (record/direct); interpolated (CSP/CST/CSV); synchronised; homing; autotuning; setting-up
Fieldbus Protocols	EtherCAT, EtherNet/IP, Modbus/TCP, PROFINET IRT, PROFINET RT
Fieldbus Transmission Rate	100 Mbit/s
Fieldbus Connection	2× RJ45
Ethernet Interface Protocol	TCP/IP (commissioning)
Communication Profiles	CiA402, CoE, EoE, FoE, PROFIdrive
Secure Communication Profile	PROFIsafe
Encoder Interface 1	BiSS-C, EnDat 2.1/2.2, Hiperface, SIN/COS, Incremental, Nikon
Encoder Interface 2	Incremental, SIN/COS
Synchronisation Interface	Encoder emulation / encoder input A/B/Z
Max. Encoder Output Frequency	1 MHz / 16384 ppr
Digital Logic Inputs	12 (including 2 high-speed, 1 µs resolution)
Digital Logic Outputs 24V DC	6 (including 2 high-speed, 1 µs resolution)
Floating Switching Output	1 (max. 50 mA)
Analogue Setpoint Inputs	1 × differential ±10 V
Safe Inputs (2-pin)	4
Diagnostic Outputs	4
Motor Temperature Sensor Inputs	1
Safety Functions	STO (Cat. 4/PLe), SBC (Cat. 3/PLe), SS1, SS2, SLS, SOS, SMS
Safety Integrity Level	SIL 3
Hardware Fault Tolerance	1
Ambient Temperature	0 °C – 50 °C (derate 3%/°C above 40 °C)
Storage Temperature	-25 °C – 55 °C
Relative Humidity	5 – 90%, non-condensing
Max. Installation Height	2000 m (derate 1%/100 m above 1000 m)
Degree of Protection	IP20
Protection Class	I
Overvoltage Category	III
Pollution Degree	2
Surge Immunity	6 kV
Conforms to Standards	EN 61800-3, EN 61800-5-1, EN 61800-5-2, EN ISO 13849-1
Approvals	CE, UKCA, UL (E331130), RCM, KC, KC-EMV, TÜV Rheinland 01/205/6032.00/25
LABS (PWIS) Conformity	VDMA 24364 Zone III
RoHS Compliance	Yes

Common Applications

• Packaging machinery — servo-driven form-fill-seal units, robotic pick-and-place, and flying-knife cut-off axes where synchronised multi-axis motion and rapid profile switching are critical to output rates.
• Food processing equipment — portioning machines, conveyor indexers, and filling lines where SIL 3 safety compliance and washdown-ready panel integration (drive in IP54+ enclosure) reduce certification effort.
• Textile machinery in Coimbatore — warp beam drives, let-off and take-up axes on rapier and air-jet looms, and yarn-winding spindle controllers requiring precise tension and speed synchronisation across multiple axes.
• CNC machine tools and machining centres — feed axis drives on VMCs, lathes, and grinding machines where 24-bit resolution, 16 kHz current loop bandwidth, and EtherCAT real-time networking are standard requirements.
• Mining and metals handling — positioning drives on conveyor dosing gates, roller tables, and overhead crane hoisting axes where wide input voltage tolerance (200–480V) and high surge immunity (6 kV) are essential in harsh electrical environments.
• Sustainability and energy infrastructure — test bench drives, solar tracker axes, and flow-control valve actuators in water treatment plants where IEC 61800-5-2 (functional safety) compliance is mandated by project specifications.

Why Buy from Murali Pneumatics?

• Authorized Festo Channel Partner since 1991 — over three decades of stocking and supporting Festo drives, pneumatics, and motion systems across Tamil Nadu's industrial belt.
• 100% genuine products with full Festo warranty — every CMMT-AS unit is sourced directly from Festo and carries the manufacturer's warranty; no grey-market or refurbished stock.
• Ready stock of popular CMMT-AS variants at our Coimbatore store — call or WhatsApp before visiting to confirm availability and avoid project delays.
• Expert technical support — our team can assist with drive sizing, motor-cable selection, safety wiring, and first-time commissioning using Festo's CMMT parameterisation software. Call +91 98422 47546.

Compatible Accessories and System Components

• Servo Motors — Festo EMMT-AS series synchronous servo motors with matched encoder interfaces (EnDat 2.2, Hiperface) for plug-and-play auto-identification
• Operator Unit — Festo CDSB operator panel for local parameterisation, jog, and status display (ordered separately)
• Motor Power Cables — Festo NEBM shielded motor cables in required length (max. 50 m without external mains filter)
• Encoder Cables — Festo NEBM encoder cables matched to EnDat, Hiperface, or SIN/COS encoder types
• External Brake Resistor — required for high-regenerative duty cycles; rated 30–40 Ω, max. 4500 W continuous (Festo or third-party)
• 24V DC Logic Power Supply — Festo CACN or third-party DIN-rail PSU rated minimum 3.5 A for logic + I/O + parking brake
• Shielded RJ45 Ethernet Cables — for EtherCAT or PROFINET daisy-chain connections in the control panel
• Safe I/O Wiring Accessories — Festo CAPC connector sets and terminal blocks for safe input (STO/SS1) wiring per EN ISO 13849-1

All accessories available from stock or on indent. Ask us to configure your complete CMMT-AS drive system — motor, cables, PSU, and commissioning support.