Configured for DC voltage rectification and bus power distribution in Experion PKS networks, the Honeywell FC-PSU-UNI2450 (FC-PSU-UNI2450 Power Supply Unit) provides direct physical/electrical execution. The hardware module receives raw primary line voltages and converts them into regulated direct current output, ensuring deterministic backplane power delivery across connected distributed controller nodes and associated field termination assemblies.
Hardware Specifications
Parameter
Specification
Model
FC-PSU-UNI2450
Brand
Honeywell
Origin
USA
Weight
3 Kg
Dimensions
Standard Chassis Form Factor
Operating Temp
-20 to 70 deg C
Output Voltage
24 VDC
Input Voltage
Auto-ranging AC
Enclosure Type
Vented Metal Housing
Condition
New & Original
Channel-to-Channel Isolation and Loop Power
While operating as the primary voltage source for process control racks, the FC-PSU-UNI2450 indirectly supports 4-20 mA HART loop protocol transmissions by maintaining absolute voltage stability across the DC bus. High-frequency channel-to-channel isolation within the connected I/O termination assemblies relies on the clean DC power delivered by this unit to prevent cross-talk and ground loop propagation. The filtered power output ensures that low-level FOUNDATION Fieldbus communications and analog signal scaling remain unaffected by incoming AC line transients or industrial electromagnetic interference.
Frequently Asked Questions
Q: Can the FC-PSU-UNI2450 be deployed in a redundant N+1 power configuration?
A: Yes. The power supply unit supports load-sharing configurations when wired in parallel with identical units, allowing seamless switchover during individual module faults without interrupting backplane voltage.
Q: What is the primary output voltage supplied to the field termination assemblies?
A: The hardware delivers a regulated 24 VDC output, which acts as the excitation voltage for field instruments and powers the localized logic circuits of the DCS modules.
Field Installation Guidelines
Ensure the primary AC mains circuit breaker is completely de-energized and locked out before wiring the input terminals.
Mount the 3 Kg chassis securely onto the designated backplate or DIN rail using specified mechanical fasteners to prevent vibration fatigue.
Terminate incoming high-voltage AC conductors using insulated ring lugs, maintaining a minimum of 5 full threads of engagement on the terminal block screws.
Segregate the 24 VDC output cables from 115/230 VAC input lines by a minimum of 200 mm within the control cabinet to eliminate inductive cross-coupling.
Connect the chassis earth stud directly to the central cabinet grounding bar using a low-impedance copper conductor to safely dissipate transient surge voltages.
