YOKOGAWA PS35*A Power Supply Modules

The YOKOGAWA PS35*A, also cataloged as the PS35 Power Supply Modules, operates as a dedicated hardware component for regulating and distributing regulated DC power across backplane buses within CENTUM DCS system racks. It converts primary supply input into dual output rails to drive internal logic circuitry and field interface components.

Hardware Specifications

Channel-to-Channel Isolation & Power Rail Regulation

The YOKOGAWA PS35*A power supply module incorporates galvanic isolation barriers between its primary input circuit, internal backplane logic outputs, and auxiliary field power rails. Consequently, this design prevents high-voltage supply transients and line noise from propagating into sensitive processor logic or downstream 4-20 mA HART loop protocol interfaces. Internal voltage regulator circuits continuously monitor load currents across both the 5 VDC logic bus and 24 VDC field output rails to ensure stable voltage stability during step-load changes.

Frequently Asked Questions

Q: How does the PS35*A manage internal thermal dissipation during continuous full-load operation?

A: Heat dissipation occurs passively through integral cooling fins on the module housing. Technicians must maintain unimpeded vertical ventilation paths above and below the rack slot to prevent thermal throttling.

Q: What precautions are required when replacing a PS35*A unit in a redundant power configuration?

A: Engineers must verify that the parallel power supply unit is fully operational and sharing the bus load before unseating the target module to prevent an ungraceful system shutdown.

Field Installation Guidelines

Mount the YOKOGAWA PS35*A securely into the assigned power supply slot of the baseplate chassis, confirming that edge connectors sit flush against the backplane receiver. Connect primary AC or DC supply lines using approved wire gauges, keeping power conductors strictly isolated from low-voltage field communication wiring. Bond the cabinet chassis to a low-impedance safety ground terminal before applying primary power. Finally, ensure all module locking screws are torqued down completely to sustain physical connection under industrial vibration.