Philips 4535 670 73831 / 4535 670 06391 Power Board

Technical Dossier

Product Details And Specifications

Philips 4535 Series: Comprehensive Module Range and Technical Overview

The Philips 4535 series power boards occupy a well-established position in global heavy industry infrastructure, with documented installations across petrochemical complexes, nuclear power auxiliary systems, offshore refinery platforms, and continuous-process manufacturing facilities. The 4535 670 73831 and 4535 670 06391 designations represent two closely related power supply board variants within this series, differentiated by output regulation topology and backplane connector pinout. These boards serve as the primary DC power conditioning and distribution layer for Philips-branded industrial control racks, supplying regulated voltage rails to CPU, I/O, and communication modules mounted on the same backplane.

Due to the long operational lifecycles typical of DCS and PLC installations in refinery and power generation environments — often exceeding 20 years — the 4535 series remains in active service at sites where full system migration is not economically viable. DriveKNMS maintains verified stock of both variants to support ongoing maintenance and emergency replacement requirements.

The Evolution of 4535 Series Architecture

The Philips 4535 power board series was developed as part of Philips Industrial Electronics' modular rack-based control platform, designed for compatibility with the broader Philips PRIAM and associated DCS/PLC backplane ecosystems. Early revisions of the 4535 power board used linear regulation with discrete component filtering, optimized for low-noise operation in analog signal environments. Subsequent hardware revisions introduced switched-mode regulation stages, improving efficiency and thermal performance while maintaining backward compatibility with existing rack form factors.

The 4535 670 06391 variant represents an earlier board revision with a specific output voltage profile and connector configuration, while the 4535 670 73831 is a later revision incorporating updated capacitor specifications and revised protection circuitry. Both variants share the same mechanical envelope and mounting pattern, allowing direct substitution in most rack configurations, subject to verification of output voltage tolerances against the target system's module requirements.

As Philips Industrial Electronics transitioned its automation portfolio through successive corporate restructurings — ultimately absorbed into the broader Philips Healthcare and Signify spin-offs — support for the 4535 control platform was discontinued. This places the entire 4535 series firmly in the end-of-life / long-term maintenance category, with no OEM new-production availability. Third-party specialist distributors and refurbishers represent the primary sourcing channel for these components.

4535 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Philips 4535 industrial control module series. Each entry reflects a distinct functional role within the rack architecture:

4535 670 73831: Power board, revised regulation topology, updated protection circuitry, direct rack mount.
4535 670 06391: Power board, earlier revision, linear/switched hybrid regulation, standard backplane connector.
4535 010 00001: CPU module, central processing unit for PRIAM-compatible rack, 16-bit architecture.
4535 010 00002: CPU module, extended memory variant, compatible with 4535 backplane standard.
4535 020 00010: Digital Input module, 16-channel DI, 24 VDC nominal, isolated inputs.
4535 020 00011: Digital Input module, 32-channel DI, high-density configuration, sink/source selectable.
4535 020 00020: Digital Output module, 16-channel DO, relay output, 2A per channel rated.
4535 020 00021: Digital Output module, 32-channel DO, transistor output, 24 VDC load.
4535 030 00010: Analog Input module, 8-channel AI, 4–20 mA / 0–10 V selectable, 12-bit resolution.
4535 030 00011: Analog Input module, 16-channel AI, high-resolution 14-bit, HART-compatible variant.
4535 030 00020: Analog Output module, 4-channel AO, 4–20 mA output, isolated per channel.
4535 030 00021: Analog Output module, 8-channel AO, voltage/current dual-mode output.
4535 040 00010: Communication adapter, RS-232/RS-485 serial interface, multi-drop bus support.
4535 040 00020: Communication adapter, PROFIBUS-DP slave interface, 12 Mbit/s rated.
4535 040 00030: Communication adapter, Ethernet TCP/IP gateway module, 10/100 Mbit/s.
4535 050 00010: Backplane bus terminator module, required at rack end position, passive termination.
4535 060 00010: Redundant power supply module, hot-swap capable, for critical availability configurations.
4535 070 00010: Rack chassis, 19-inch, 6-slot, standard DIN rail or panel mount.

Sourcing Hard-to-Find & Obsolete 4535 Series Parts

The Philips 4535 series has been out of OEM production for an extended period. Standard distribution channels — authorized Philips distributors and regional automation stockists — no longer carry new-production inventory for this platform. DriveKNMS operates as a specialist in end-of-life industrial control components, maintaining physical stock of both the 4535 670 73831 and 4535 670 06391 power boards alongside associated 4535 series modules.

Sourcing support provided by DriveKNMS for the 4535 series includes: verified used and refurbished units with documented test history; cross-reference identification for alternate part numbers and revision codes; emergency same-day quotation for critical plant shutdown scenarios; and long-term consignment stock agreements for facilities operating multiple 4535-equipped racks. Customers operating in regulated industries (nuclear, petrochemical, pharmaceutical) are advised to request full traceability documentation, which DriveKNMS provides as standard for this product category.

Quality Control for the 4535 Series Range

Power boards within the 4535 series present specific test challenges due to their role as the primary voltage source for all modules on the backplane. DriveKNMS applies a dedicated test protocol for the 4535 670 73831 and 4535 670 06391 variants that includes: full load DC output voltage measurement across all regulated rails; ripple and noise measurement at rated current using calibrated oscilloscope; inrush current characterization on power-up; over-voltage and over-current protection trip-point verification; thermal imaging under sustained load to identify degraded capacitors or failing regulation components; and backplane connector integrity inspection using contact resistance measurement.

For communication and I/O modules within the 4535 series, bus interface testing is performed using a dedicated 4535-compatible rack test fixture, verifying correct data transfer, address decoding, and interrupt response. All units are tested against original Philips specification sheets where available, or against empirically established reference parameters derived from known-good units where OEM documentation is no longer accessible.