Product Description

The PW501-S1 is a high-performance, rack-mounted power supply unit designed for Yokogawa control systems. It converts standard AC mains into stable, regulated DC power for system components and field devices.

The S1 style designation identifies a specific hardware revision, ensuring compatibility with modern backplane architectures while maintaining rigorous isolation and reliability standards required for industrial process automation.

Technical Specifications

• Model / Style: PW501 (PW501-S1)

• Input Voltage Range: 100–240 V AC (wide-range)

• Input Frequency: 50/60 Hz

• Output Efficiency: Optimized for low heat dissipation and high-duty cycle performance

• Redundancy Support: Compatible with dual-redundant configurations for continuous operation

• Diagnostic Indicators: Front-facing LEDs for "READY" (green) and "FAULT" (red) status monitoring

• Cooling Mechanism: Natural convection for cabinet-based thermal management

• Safety Standards: Compliant with industrial EMC and surge protection requirements

• Mounting Interface: Plug-in style for integration into system power nests or base plates

Operational Application

The PW501-S1 functions as the primary power gatekeeper for the control rack:

• Converts AC mains to clean 5 V and 24 V DC rails

• Provides stable power to field instruments such as transducers and valve positioners

• S1 revision improves component longevity, making it suitable for 24/7 operations in water treatment plants, petrochemical refineries, and other continuous-process facilities

Technical FAQ

Q: Does the PW501-S1 support hot-swapping?
A: Yes. In a dual-redundant configuration, the PW501-S1 can be replaced while the system is live without interrupting power to processors or I/O modules.

Q: Is the PW501-S1 compatible with older PW501-S0 base plates?
A: Generally, S1 modules are backward compatible with standard PW501 slots. However, it is recommended to check the system manual to ensure load-sharing balance in redundant pairs.