Description

Application Scenarios:

At a municipal water treatment facility in the Midwest, an aging centrifugal pump driven by a fixed-speed motor was causing excessive water hammer and energy waste during flow modulation via throttling valves. Engineers replaced the starter with a S-D4007 drive, enabling soft-start operation and variable-speed control based on tank level. Within weeks, the plant reduced energy consumption by 32% and eliminated valve maintenance costs. Despite high ambient humidity and temperature swings, the S-D4007 operated continuously for over five years—demonstrating its resilience in demanding infrastructure environments where reliability trumps complexity.

Main Parameters Value/Description

Product Model S-D4007

Manufacturer Reliance Electric (Rockwell Automation)

Product Category AC Adjustable Speed Drive (Inverter)

Motor Power Rating 1 HP (0.75 kW)

Input Voltage 1-phase or 3-phase 200–240 V AC ±10%

Output Voltage 3-phase 0–240 V AC (PWM)

Rated Output Current 4.0 A

Control Method V/Hz (Volts-per-Hertz), no sensorless vector

Frequency Range 0.1 to 400 Hz

Enclosure Type NEMA 1 (IP20) – open chassis for panel mounting

Mounting Method DIN rail or direct panel mount

Built-In Features RFI/EMI filter, DC bus braking transistor (external resistor optional), analog 0–10V speed reference

Operating Temperature 0°C to +50°C (derate above 40°C)

Certifications UL, cUL, CE

Technical Principles and Innovative Values:

• Innovation Point 1: The S-D4007 features an integrated RFI filter compliant with EN 61800-3 Category C2. significantly reducing electromagnetic interference in sensitive industrial settings—eliminating the need for external filters in most applications.

• Innovation Point 2: Its auto-tuning V/Hz algorithm automatically adjusts voltage boost at low frequencies, ensuring stable torque delivery down to 3 Hz without manual parameter tweaking—ideal for non-engineer operators.

• Innovation Point 3: Compact footprint (only 140 mm wide) allows high-density installation in control panels, while the conformal-coated PCB enhances resistance to moisture and dust—extending service life in washdown or outdoor enclosures.

• Innovation Point 4: Simple analog interface (0–10V input, 0–10V output for monitoring) enables seamless integration with legacy PLCs, DCS I/O cards, or manual potentiometers—making it a go-to choice for brownfield upgrades.

Application Cases and Industry Value:

A food processing plant in Ontario used the S-D4007 to retrofit 12 conveyor lines previously controlled by mechanical clutches. The drives enabled synchronized speed control across multiple zones using a single 0–10V master signal, improving product handling and reducing jams by 75%. Maintenance technicians appreciated the clear LED status display and built-in fault logging (e.g., “OH” for overheat, “OL” for overload), which cut troubleshooting time from hours to minutes. Over a three-year period, zero drive failures were reported—validating the S-D4007’s reputation for “install-and-forget” reliability in continuous-duty applications.

Installation, Maintenance, and Full-Cycle Support:

The S-D4007 installs quickly on a 35 mm DIN rail or directly onto a back panel with two screws. Proper grounding and separation of power/motor cables from control wiring are essential to prevent noise coupling. Commissioning typically involves setting only three parameters: max frequency, acceleration/deceleration time, and speed reference source. Routine maintenance includes periodic inspection of cooling vents and verification of terminal torque. While the drive has no user-serviceable parts, its robust design ensures >100.000 hours MTBF under normal conditions.

We stock tested and verified S-D4007 units sourced from decommissioned industrial systems or surplus inventory, each inspected for capacitor health, IGBT integrity, and full functional operation across load ranges. Our technical team provides wiring diagrams, parameter templates, and cross-reference guidance to modern alternatives like PowerFlex—ensuring you get the right solution for legacy continuity or phased migration. Whether you need one unit for emergency repair or dozens for a fleet upgrade, we deliver reliability you can count on.

Contact us for a customized solution—whether you’re maintaining vintage Reliance Electric systems, optimizing energy use with the S-D4007. or planning a strategic migration to next-generation drives. Keep your motors running, efficiently and reliably.