GE DS3820EPSA

Key Parameters

• Channels: 4 independent pulse/PWM outputs

• Output Type: 24 V DC (sourcing), open-collector (supporting both sinking and sourcing configurations)

• Maximum Frequency: 200 kHz per channel

• PWM Resolution: 16-bit (duty cycle steps)

• Pulse Modes: Continuous pulse train, PWM, stepper pulse/direction, servo pulse (position control), burst/block pulses (programmable count)

• Output Current: 0.5 A per channel (continuous), 1 A peak

• Protection: Short-circuit protection, over-temperature protection

• Diagnostics: Per-channel LED status, short-circuit detection, over-temperature alarm

• Isolation: 1500 V RMS (field-to-backplane); 500 V RMS between channels

• Power: 24 V DC backplane power, ≤3 W (logic); external 24 V field supply required for outputs

• Operating Temperature: –40°C to +70°C

• Terminals: Screw-type (suffix-dependent)

Advantages

• High-speed pulse output – up to 200 kHz per channel; supports high-speed stepper/servo control and precision PWM.

• Versatile output modes – supports continuous pulse, PWM, step/direction, servo pulse, and burst pulse modes – all in one module.

• Independent channels – four fully independent channels with individual frequency, duty cycle, and pulse count settings.

• 16-bit PWM resolution – fine-grained control for heating, speed, and dimming applications.

• Programmable pulse count – burst mode outputs a precise number of pulses; ideal for stepper motor positioning.

• Diagnostic feedback – short-circuit and over-temperature detection for each channel.

• Hot-swappable – replace without rack power-down.

• High channel density – four high-speed outputs in one slot; saves rack space.

Applications

• Stepper motor control – pulse/direction outputs for stepper motor drivers in positioning systems

• Servo motor control – pulse train for servo drives in CNC, robotics, and automation

• PWM speed control – speed control for DC motors, blowers, and pumps

• Heating control – PWM for temperature regulation in furnaces and ovens

• Lighting control – PWM dimming for LED and incandescent lighting systems

• Precision positioning – burst pulse outputs for move-to-position applications

• Conveyor synchronization – pulse control for synchronized conveyor drives

• Test & measurement – generating pulse trains for simulation and testing

Competitor Comparison

The DS3820EPSA is the high-performance pulse/PWM output module. Compared to standard digital output modules, it adds high-speed pulse generation and PWM capability – essential for motion and precision control applications. Against competitor pulse modules, the DS3820EPSA offers higher frequency (200 kHz vs. 100 kHz), finer PWM resolution (16-bit vs. 8-bit), and more versatile modes (step/direction, burst, servo) at a lower cost. For motion control, speed regulation, and precision heating/lighting applications, the DS3820EPSA delivers the most feature-rich and cost-effective solution.

Selection Tips

• Choose DS3820EPSA when you need high-speed pulse trains or PWM outputs for stepper/servo control, speed regulation, or precision heating/dimming.

• Ideal for motion control, conveyor synchronization, DC motor speed control, and temperature regulation.

• Verify the output mode matches your application – continuous, PWM, step/direction, servo, or burst.

• Consider the output current requirement – 0.5 A per channel; use external drivers for higher current loads.

• Not suitable for AC loads – use dedicated AC output modules.

• Ensure your PLC/DCS supports high-speed pulse output configuration and data transfer to the DS3820EPSA.

Precautions

• Frequency limits: Maximum 200 kHz achieved with minimal CPU load. Higher frequencies may increase backplane communication demand.

• Output current: Do not exceed 0.5 A per channel continuously. Use external amplifiers or drivers for higher current motors/loads.

• Inductive loads: Use external flyback diodes for inductive loads to prevent back-EMF damage.

• Step/direction wiring: For stepper motor applications, ensure correct wiring of the pulse and direction outputs – the DS3820EPSA uses open-collector outputs; verify your driver’s input requirements.

• PWM filtering: For speed control, consider external filtering if analog output is required – the DS3820EPSA provides digital PWM output.

• Power: Requires external 24 V field supply – ensure supply capacity for output loads.

• Cable shielding: For high-frequency outputs, use shielded cables to reduce EMI and signal degradation.

• Spare: Keep one spare DS3820EPSA for critical motion or PWM applications – the high-speed feature set may have longer lead times.