Model Definition

DSC: Analog closed-loop single-axis servo amplifier family for Indramat old rack servo system

1.6: Core PCB hardware revision V1.6, upgraded analog control circuit vs V1.4 version with optimized loop stability

50: Continuous rated output current 50Arms for motor driving, short-term overload capacity specified by factory design

Technical Parameters

DC Bus Supply: Nominal 300VDC shared intermediate DC link, paired with TVM series centralized rectifier power supply module

Output Rating: Continuous 50A RMS; 200% overload permissible within 5 seconds for startup acceleration

Auxiliary Control Input: Standard 115VAC optional 230VAC auxiliary control power, internal integrated 24VDC auxiliary supply for peripheral sensors

Cooling Specification: Passive finned heat sink natural convection cooling, ambient above 40°C requires partial output derating

Compatible Motors: Indramat MAC / MDC resolver-type brushless synchronous servo motors

Ambient Specification: Operating 0°C~+45°C non-derate, storage -25°C~+70°C, non-condensing humidity ≤85%, altitude below 1000m

Mechanical Spec: Standard 19-inch rack plug-in dimension, net weight approx 1.35kg, IP20 protection for cabinet installation only

Interface & Communication Configuration

Main Power Terminals

Screw terminals for DC bus positive/negative input, U/V/W three-phase motor power output, external dynamic braking resistor connection terminal.

Feedback Interface

Dedicated multi-core socket for resolver analog position feedback wiring from servo motor.

Analog Command Port

±10V differential analog input for external speed or torque reference signal from upper CNC/PLC controller; auxiliary analog monitor output for actual speed/load signal measurement.

Digital I/O Terminals

24VDC discrete terminals for servo enable, fault reset input, servo-ready dry-contact output and fault alarm relay output.

Onboard Adjustment Interface

Panel-mounted trimming potentiometers for speed loop gain, offset and current loop calibration for manual tuning matching different load inertia.

Core Functions

Full analog current-speed dual closed-loop regulation; external position closed-loop realized via host controller analog command signal.

High-precision resolver signal demodulation to acquire rotor position without digital encoder.

Comprehensive protection logic: overcurrent, overvoltage, DC bus undervoltage, overheat, resolver wire breakage, motor phase loss protection with hardware alarm contact output.

Improved anti-oscillation performance on V1.6 hardware, better adaptability to variable inertia load compared with older 1.4 edition.

External braking resistor absorbs regenerative energy generated during rapid deceleration of high inertia load.

Application Scenarios

Spare replacement & equipment retrofit for vintage imported CNC lathe and milling machine feed axes

Traditional printing and packaging machinery fixed precision transmission servo control

Legacy textile production line single-axis positioning drive renovation

Old metal stamping and forming automation equipment maintenance spare part

Laboratory special analog servo test bench construction

Usage & Maintenance Instruction

Cut off cabinet main power and wait no less than 15 minutes for internal high-voltage capacitor full discharge before disassembly.

Clean radiator dust every six months to avoid overheat shutdown caused by poor heat dissipation.

Adjust panel potentiometers moderately; excessive rotation will lead to system oscillation or internal component damage.

Strictly verify resolver wiring definition when replacing motor to prevent abnormal rotation and drive overload.