Description
Honeywell 620-0090
Technical Specifications
- Input Voltage: 85 VAC to 264 VAC universal AC input
- Input Frequency: 47 Hz to 63 Hz
- Main Output: 5 VDC, 18 A continuous for backplane bus
- Auxiliary Output: 24 VDC, 4 A continuous for field circuits
- Output Regulation: ±1 % for 5 VDC, ±2 % for 24 VDC
- Isolation: 2500 VAC isolation between AC input and DC output side
- Operating Temperature: 0 °C to +60 °C
- Power Consumption: 110 W maximum rated output
- Hot Swap Support: Yes for redundant rack installation
Functional Features Universal wide-range AC input suitable for global industrial mains supply. Independent overvoltage, overcurrent and overtemperature shutdown protection. Automatic recovery after fault removal for non-latching protection events. Front panel LED indicators for AC input, 5 VDC output, 24 VDC output and fault alarm. Power good diagnostic signal sent to backplane for CPU power status monitoring. Built-in EMI filter to suppress conducted noise back into AC mains.
Application Scenarios Main power supply for standard IPC620 control racks Redundant power supply channel for high availability IPC620 systems Auxiliary 24 VDC field power supply for cabinet local instrument power Spare power supply replacement for aging IPC620 control cabinets
Performance Parameters
- Ripple and noise: Less than 50 mV peak to peak on 5 VDC output
- Hold-up time: 20 ms minimum at full rated load
- Isolation withstand voltage: 2500 VAC for 60 seconds
- Efficiency: 85 % minimum at 50 % rated load
Material Composition Metal shielded power enclosure, high-frequency switching transformer, primary side rectifier bridge, output filter inductor and capacitor bank, optocoupler feedback isolation circuit, power semiconductor switching devices, NTC inrush current limiter, TVS surge suppression components, AC input terminal block, DC backplane gold-plated connector.
Structural Features Standard eurocard plug-in form factor matching dedicated power slot of IPC620 rack. Metal housing provides EMI shielding and mechanical protection for internal power circuits. Front panel carries AC input switch, status LED group and fault indicator. Internal isolation barrier separates hazardous AC input circuit from low voltage DC side. Anti-keying notch prevents installation into signal I/O module slots. Internal airflow channel designed for convection cooling.
Working Principle AC mains input passes through EMI filter and inrush current limiting circuit before entering rectifier and PFC stage. High-frequency switching circuit converts rectified DC into high frequency AC for transformer isolation. Secondary rectification and filtering produce stable 5 VDC and 24 VDC regulated output. Feedback loop continuously samples output voltage to adjust duty cycle and maintain output precision. Protection circuits monitor output voltage, output current and internal temperature. When parameter exceeds threshold, switching circuit shuts down output immediately and triggers fault flag to backplane.
Installation Requirements Reserve sufficient vertical air gap around the power module for heat dissipation. Use matched gauge power cable for AC input terminal wiring and fasten firmly. Verify AC input voltage matches local power grid before power-on. Configure redundant power logic inside IPC software for dual power supply racks. Check LED status and output voltage after power-up before loading I/O modules.
Usage Notes Do not operate the module without proper ventilation, overheating triggers shutdown. Short circuit on 24 VDC auxiliary output activates protection and cuts auxiliary power. Do not modify internal sampling resistors and feedback components. Keep the metal housing surface clean to avoid dust accumulation affecting heat dissipation.
