Allen-Bradley |1756-PA75R/A|Redundant Power Supply
Description
The 1756-PA75R/A is a high-reliability AC redundant power supply designed for use in critical ControlLogix applications. It provides additional uptime protection by ensuring continuous operation even if one power supply fails. The system includes a passive chassis adapter (1756-PSCA2 or 1756-PSCA2XT) that funnels power from the redundant supplies to the single power connector on the ControlLogix chassis backplane.
Features
- Redundancy: Two power supplies share the load; if one fails, the other continues to power the system.
- Wide Input Voltage Range: Supports AC 120/240V ±15%.
- High Efficiency: Up to 93.9% efficiency at 230Vac.
- Compact Design: Small size for easy installation.
- Diagnostics: Includes a solid-state relay and LEDs for status monitoring.
- Auto-Sensing Input: Automatically detects and selects between 120V and 240V AC inputs.
- Global Approvals: Suitable for nearly any installation environment.
Technical Specifications
Input Voltage:
- AC 120/240V ±15%
- Frequency: 50-60Hz ±6%
Output Voltage:
- 24V DC
- Adjustment Range: 24-28V
Output Current:
- Continuous: 2.8A at 24V DC, 13.0A at 5.1V DC, 4.0A at 3.3V DC, 1.5A at 1.2V DC
- Maximum: 75W, 20A inrush max
Power Rating:
- 120VA, 115W at 120/240V AC
- 240V AC 50/60 Hz, 240V DC, 50 mA (resistive only)
Efficiency:
- 93.9% at 230Vac
- 92.4% at 120Vac
Losses:
- 39.6W at 120Vac
- 31.4W at 230Vac
Operating Temperature:
- -25°C to +70°C
- Derating: 12W/°C from +60°C to +70°C
Hold-Up Time:
- 32ms at 120Vac
- 51ms at 230Vac
Dimensions:
- 82x124x127mm (WxHxD)
Isolation Voltage:
- 250V continuous, Reinforced Insulation Type (Power Input to Backplane, Power Input to Annunciator, Annunciator to Backplane)
Inrush Current:
- 9A peak at 120Vac
- 7A peak at 230Vac
Protective Earth:
- Must be connected to chassis ground lug or ground bus
Annunciator:
- Optional user-provided wiring can be connected to the solid-state relay for status and troubleshooting. Max length: 10m (32.8 ft)
Installation Requirements:
- Use 2.5 mm² (14 AWG) solid or stranded copper wire rated at 90°C (194°F) with a maximum insulation thickness of 1.2 mm (3/64 in).
- Torque terminals to 0.565 N•m (5 lb•in).
- Install in an enclosure with minimum spacing requirements as specified in the ControlLogix Chassis Installation Instructions.
Safety:
- Do not connect or disconnect wiring while field-side power is on to avoid electric arcs.
- Use a 15A time-delay type fuse in all ungrounded power connections.
- Ensure the equipment is used within the temperature range of 0°C to 60°C (32°F to 140°F).
Compatibility:
- Compatible with chassis models: 1756-A4/B, 1756-A7/B, 1756-A10/B, 1756-A13/B, 1756-A17/B, 1756-A4/C, 1756-A7/C, 1756-A10/C, 1756-A13/C, 1756-A17/C.
Allen-Bradley |1756-PA75R/A|Redundant Power Supply
Allen-Bradley |1756-PA75R/A|Redundant Power Supply
Description
The 1756-PA75R/A is a high-reliability AC redundant power supply designed for use in critical ControlLogix applications. It provides additional uptime protection by ensuring continuous operation even if one power supply fails. The system includes a passive chassis adapter (1756-PSCA2 or 1756-PSCA2XT) that funnels power from the redundant supplies to the single power connector on the ControlLogix chassis backplane.
Features
- Redundancy: Two power supplies share the load; if one fails, the other continues to power the system.
- Wide Input Voltage Range: Supports AC 120/240V ±15%.
- High Efficiency: Up to 93.9% efficiency at 230Vac.
- Compact Design: Small size for easy installation.
- Diagnostics: Includes a solid-state relay and LEDs for status monitoring.
- Auto-Sensing Input: Automatically detects and selects between 120V and 240V AC inputs.
- Global Approvals: Suitable for nearly any installation environment.
Technical Specifications
Input Voltage:
- AC 120/240V ±15%
- Frequency: 50-60Hz ±6%
Output Voltage:
- 24V DC
- Adjustment Range: 24-28V
Output Current:
- Continuous: 2.8A at 24V DC, 13.0A at 5.1V DC, 4.0A at 3.3V DC, 1.5A at 1.2V DC
- Maximum: 75W, 20A inrush max
Power Rating:
- 120VA, 115W at 120/240V AC
- 240V AC 50/60 Hz, 240V DC, 50 mA (resistive only)
Efficiency:
- 93.9% at 230Vac
- 92.4% at 120Vac
Losses:
- 39.6W at 120Vac
- 31.4W at 230Vac
Operating Temperature:
- -25°C to +70°C
- Derating: 12W/°C from +60°C to +70°C
Hold-Up Time:
- 32ms at 120Vac
- 51ms at 230Vac
Dimensions:
- 82x124x127mm (WxHxD)
Isolation Voltage:
- 250V continuous, Reinforced Insulation Type (Power Input to Backplane, Power Input to Annunciator, Annunciator to Backplane)
Inrush Current:
- 9A peak at 120Vac
- 7A peak at 230Vac
Protective Earth:
- Must be connected to chassis ground lug or ground bus
Annunciator:
- Optional user-provided wiring can be connected to the solid-state relay for status and troubleshooting. Max length: 10m (32.8 ft)
Installation Requirements:
- Use 2.5 mm² (14 AWG) solid or stranded copper wire rated at 90°C (194°F) with a maximum insulation thickness of 1.2 mm (3/64 in).
- Torque terminals to 0.565 N•m (5 lb•in).
- Install in an enclosure with minimum spacing requirements as specified in the ControlLogix Chassis Installation Instructions.
Safety:
- Do not connect or disconnect wiring while field-side power is on to avoid electric arcs.
- Use a 15A time-delay type fuse in all ungrounded power connections.
- Ensure the equipment is used within the temperature range of 0°C to 60°C (32°F to 140°F).
Compatibility:
- Compatible with chassis models: 1756-A4/B, 1756-A7/B, 1756-A10/B, 1756-A13/B, 1756-A17/B, 1756-A4/C, 1756-A7/C, 1756-A10/C, 1756-A13/C, 1756-A17/C.
