Model Code Definition

DKC = ECODRIVE03 full digital servo drive product family identifier

21.3 = Series 21 Revision 3 high-power hardware platform, equipped with enhanced heat sink and independent cooling blower, reserved expansion slot for optional fieldbus daughterboard

200 = Nominal continuous rated output current: 200Arms

7 = High voltage specification, three-phase AC380~480V input, nominal 700VDC DC bus design

FW = General-purpose basic firmware with three-loop closed-loop control; no embedded electronic cam and master-slave electronic synchronization functions compared to FM dedicated firmware

Technical Specifications

Main Power Supply: 3-phase AC380~480V ±10%, 50/60Hz; separate isolated DC24V ±10% auxiliary power supply for control circuit

DC Bus Parameter: Nominal 700VDC, built-in pre-charge soft-start circuit and integrated high-capacity internal dynamic brake bleeder; peak transient energy absorption capacity 60kWs, continuous bleeder dissipation 1.8kW

Output Performance: 200Arms continuous rated output, 250% overload capacity sustain for 300ms; optional PWM carrier frequency 4kHz / 8kHz; maximum output frequency up to 800Hz

Dimension & Weight: W195mm × H465mm × D320mm, net weight approx 19.5kg, IP20 cabinet vertical DIN mounting, top-bottom ventilation reserved space required

Ambient Working Condition: Full-load continuous operation 0~+45℃, derated operation available up to +55℃; storage temperature -35℃~+85℃; installation altitude ≤1000m; relative humidity ≤95% non-condensing, no corrosive gas environment allowed

Total Power Loss: Rated-load total power dissipation 960W

Interface & Communication Configuration

Power Terminals: Heavy-duty screw terminal block for L1/L2/L3 three-phase mains input, U/V/W high-current motor power output, independent terminal port for external high-power braking resistor wiring

Encoder Interface: Dual 15pin D-SUB feedback ports compatible with TTL incremental ABZ encoder and resolver feedback, isolated onboard 5V encoder power supply

Digital I/O Terminal: Standard onboard DI/DO terminal group for drive enable, positive/negative hardware limit, homing trigger and motor holding brake sequential logic control; Parallel 2 interface expandable via optional DIO daughterboard

Command Input: ±10V analog speed/torque reference input, pulse+direction position command input

Debug & Fieldbus: Front panel RS232 serial port for DriveTop parameter commissioning; expandable with optional Profibus-DP, CANopen or SERCOS plug-in communication card via internal slot

Core Functions

FW standard firmware realizes full closed-loop position, speed and torque triple regulation. Supports three standard running modes: analog voltage speed regulation, pulse-based position positioning, multi-step fixed positioning triggered by digital input signals. Integrated STO Safe Torque Off safety function plus comprehensive multi-protection against overcurrent, DC bus over/undervoltage, power module overheat, encoder cable break and motor over-temperature, with front digital LED fault code indication. Native electronic cam and master-slave electronic gearing synchronization functions are not available under FW firmware edition.

Application Fields

Heavy-duty industrial roll forming & slitting lines, large rotary printing presses, heavy film/fabric winding machinery, high-power CNC main spindle driving, heavy-load gantry automation equipment and metallurgical auxiliary feed axes.

Operation & Maintenance Instructions

Type-7 high voltage variant must connect to three-phase AC380~480V industrial mains; single-phase AC220V input will trigger permanent DC bus undervoltage fault and severe insufficient output torque.

High-power unit with large heat generation; cabinet installation must reserve ≥50mm ventilation clearance at top and bottom, never install inside fully sealed non-ventilated cabinet.

Frequent forward-reverse reciprocating working condition requires matched external high-power braking resistor to prevent internal dynamic bleeder overheat burnout.

Parameter backup and download must use matching DriveTop software version; parameter files cannot be directly copied and migrated between FW and FM firmware versions.

Regular annual blower dust cleaning is required to avoid heat sink clogging and drive over-temperature shutdown fault F218.