S-D4043C
Product Name
Reliance Electric S-D4043C High-Efficiency AC Drive Control Module (Industrial Motor Regulation Dedicated)
(Naming convention explanation for Reliance Electric drive components:
- “S-D”: Product family prefix, denoting “Standard Drive” control modules in Reliance’s industrial automation portfolio (distinguished from “P-D” premium variants).
- “4043”: Model-specific code: “40” indicates mid-range power capacity (50W class); “43” specifies integrated Modbus RTU communication and advanced thermal management.
- “C”: Variant identifier for “Compact” form factor, optimized for space-constrained control cabinets.
- Core positioning: Acts as the “intelligent motor control hub” for industrial AC motors, balancing efficiency, precision, and environmental resilience in manufacturing and processing systems .)
2. Product Description
The Reliance Electric S-D4043C is a rugged, industrial-grade AC drive control module engineered to address motor inefficiency and integration challenges in diverse industrial sectors (e.g., manufacturing conveyors, processing pumps, automation machinery). As a core component of Reliance’s drive ecosystem, it delivers validated value through four key capabilities:
2.1 High-Efficiency Motor Regulation
Optimizes energy consumption while ensuring precise speed control:
- Employs advanced PWM (Pulse-Width Modulation) technology to minimize power loss, achieving >95% operational efficiency across variable loads — reducing energy costs by up to 20% compared to conventional drive modules .
- Supports wide-range motor speed adjustment (0–3000 RPM) with ±0.5% speed regulation tolerance, adapting to dynamic load changes in applications like packaging lines or material handling systems.
2.2 Seamless System Integration
Facilitates connectivity with industrial control networks:
- Natively supports Modbus RTU protocol via RS-485 interface, enabling real-time data exchange with PLCs (e.g., Siemens S7-1200) and SCADA systems — allowing remote monitoring of motor current, temperature, and fault status .
- Features plug-and-play compatibility with Reliance’s motor control panels, reducing integration time by 30% for new system deployments or legacy upgrades.
2.3 Industrial-Grade Environmental Resilience
Built to withstand extreme operating conditions:
- Operates reliably at -40°C~+85°C and 10%~95% non-condensing humidity, making it suitable for hot manufacturing floors, cold storage facilities, and outdoor installations .
- Integrates advanced thermal management (passive heat sinks + temperature-triggered fan control) to prevent overheating under continuous 50W load — ensuring 99.9% uptime in 24/7 operation.
2.4 Robust Protection & Diagnostics
Minimizes downtime with comprehensive safety features:
- Includes overcurrent, overvoltage, and short-circuit protection to safeguard motors and connected equipment from electrical faults .
- Features built-in LED status indicators (Power/Run/Fault) and Modbus-enabled diagnostic alerts, allowing on-site technicians and remote operators to quickly identify issues (e.g., phase loss, overheating).




