PS11*C Yokogawa Power Supply Module

The Yokogawa PS11*C, also cataloged as the PS11 Power Supply Module, operates as a dedicated hardware component for AC to DC power conversion and regulated 24 VDC bus distribution within Yokogawa CENTUM DCS subrack systems. The module accepts wide-range AC line input and generates a regulated 24 VDC output to power backplane electronics, I/O cards, and internal bus circuits with an operating efficiency exceeding 85 %. Integrated overcurrent and short-circuit protection circuits maintain rail stability during downstream electrical faults.

Suffix Breakdown & Model Matrix

Hardware Specifications

Power Distribution and Channel Isolation Infrastructure

The PS11*C module provides regulated 24 VDC power directly to field I/O racks, supporting 4-20 mA HART loop protocol instruments and field communications. Internal transformer isolation decouples AC power inputs from sensitive backplane logic buses, suppressing line noise and high-voltage transients. The isolated power rail maintains voltage stability across channel-to-channel isolation circuits on connected analog and digital I/O modules, preventing power line fluctuations from compromising signal conversion accuracy across field instrument loops.

Frequently Asked Questions

Q: How does the PS11*C handle downstream output short-circuit conditions?

A: The internal protection circuitry detects overcurrent or short-circuit events and automatically clamps or shuts down the 24 VDC output rail to protect backplane circuits until the fault condition is cleared.

Q: Can the PS11*C module be hot-swapped while the DCS subrack is energized?

A: Hot-swapping is permitted only in dual-redundant power configurations where a parallel power supply module actively supports the full 24 VDC load during extraction.

Q: What grounding configuration is required for the PS11*C module?

A: Connect the module chassis ground terminal directly to the central cabinet functional earth (FE) ground bar using low-impedance copper conductors to ensure proper noise filtering.

Field Installation Guidelines

1. Rack Mounting: Align the PS11*C module with the guide rails in the dedicated power supply slot of the chassis (150 mm x 100 mm x 50 mm). Slide the unit into place until rear connectors seat completely, then tighten upper and lower panel screws.
2. AC Input Wiring: Route primary AC line power conductors through dedicated wire channels, maintaining physical separation from low-voltage DC and communication lines to mitigate noise coupling.
3. Grounding: Connect the module ground lug directly to the main cabinet functional earth (FE) ground bus using a short, low-impedance grounding strap.
4. Thermal Management: Maintain unobstructed airflow clearance above and below the module housing to allow heat sink dissipation and ensure ambient temperatures stay between 0 and 60 deg C under continuous full-load operations.