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Yokogawa PW301 CSL/PW301 Power Supply Module

Configured for stable backplane DC voltage distribution in CENTUM CS 3000 platforms, the Yokogawa CSL/PW301 (PW301 Power Supply Module) provides direct physical/electrical execution.

Hardware Specifications

Parameter Specification
Model CSL/PW301
Brand Yokogawa
Origin Japan
Weight 0.4 kg (shipping weight 2.0 kg)
Dimensions 120 mm x 25 mm x 130 mm
Operating Temp 0 deg C to +55 deg C
Power Consumption ~100 W power capacity
Input Voltage 100 to 240 VAC (50/60 Hz)
Output Voltage Stabilized 5 VDC and 24 VDC
Output Current Up to 20 A
Redundancy Dual-redundant configuration supported
Cooling Natural convection with integrated heat sinks
Status Indicators Front-mounted LEDs for READY and FAULT diagnostics
Operating Humidity 10 to 95% RH (non-condensing)
Environmental Compliance ISA-71.04 Class G3, CE, UL Compliant

Channel Isolation & HART Subsystem Protection

The module features reinforced galvanic isolation between high-voltage AC mains input terminals and low-voltage internal DC backplane buses. This isolation shield isolates local processing nodes from grid voltage surges, high-frequency transients, and common-mode ground potential shifts. By suppressing ripple voltages and noise spikes across internal power rails, the module maintains measurement accuracy for connected 4-20 mA HART loop protocol instruments and prevents crosstalk interferences across channel-to-channel isolated analog I/O modules.

Frequently Asked Questions

Q: Does the CSL/PW301 power supply module support hot-swap replacement during system operation?

A: Yes. When you configure the Field Control Unit rack with dual-redundant power modules, you can hot-swap a single CSL/PW301 module while the backplane stays fully energized. The secondary module instantly absorbs the current draw without triggering CPU resets or I/O communication loss.

Q: How do operators verify the operational status of the CSL/PW301 module in the field?

A: Operators monitor the front panel diagnostic LEDs directly. A solid green READY LED indicates proper AC input conversion and stable DC output levels, whereas an illuminated red FAULT LED signals internal output failure, input line loss, or thermal overload.

Field Installation Guidelines

  1. Backplane Slot Alignment: Align the rear connectors of the CSL/PW301 module precisely with the guide rails in the targeted local node or RIO chassis slot. Slide the module straight into the slot until the backplane connectors seat completely. Tighten the top and bottom retaining screws to secure the physical connection.
  2. Chassis Frame Grounding: Connect the field station chassis frame to functional earth (FE) using a dedicated low-impedance copper grounding strap with a minimum cross-sectional area of 5.5 mm2. Keep total ground loop resistance below 1 ohm to optimize high-frequency noise absorption.
  3. Field Wiring Clearance: Maintain a minimum physical distance of 200 mm between incoming AC power supply cables and low-voltage DC lines, field instrumentation wiring, and high-speed communication buses to suppress inductive and capacitive coupling.
  4. Convection Cooling Clearance: Keep the top and bottom ventilation openings of the rack unobstructed to ensure adequate natural air convection across the heat sinks. Install blanking plates over empty rack slots to preserve thermal airflow patterns and keep internal operating temperatures within 0 deg C to +55 deg C.

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