The Allen-Bradley 1756-PA75R is a ControlLogix redundant power supply module designed to support automatic chassis load sharing. This module ensures continuous power to the ControlLogix system by using two power supplies in a redundant configuration. It operates within a wide input voltage range of 85-265VAC, with nominal values of 120/240VAC, and can deliver 75 W of output power at operating temperatures of 0–60 °C (+32–+140 °F). This power supply is ideal for applications requiring high reliability and fail-safe operation.

Technical Specifications

• Manufacturer: Rockwell Automation
• Part Number: 1756-PA75R
• Series: ControlLogix
• Module Type: Redundant Power Supply
• Input Voltage: 120/240VAC (85–264VAC range)
• Input Frequency: 47–63 Hz
• Input Power: 115 W / 120 VA
• Surge Transient Immunity: ±1 kV line-line (DM), ±2 kV line-earth (CM)
• Conducted RF Immunity: 10 Vrms from 150 kHz to 80 MHz
• Current Capacity:
  • 1.2 A at 1.2 VDC
  • 4 A at 3.3 VDC
  • 13 A at 5.1 VDC
  • 2.8 A at 24 VDC
• Output Power: 75 W @ 0–60 °C (+32–+140 °F)
• Hold-Up Time: 2 cycles @ 60 Hz, 50 Hz
• Inrush Current: 20 A (maximum)
• Operating Temperature: 0–60 °C (+32–+140 °F)
• Dimensions: 6.9 x 5.7 x 5.4 in. (17.5 x 14.5 x 13.7 cm)
• Weight: 1.45 kg
• Chassis Compatibility: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
• Annunciator Power: 240V AC (50/60 Hz), 240V DC, 50 mA (resistive only)
• Annunciator Wire Size: 22-14 AWG stranded copper, rated for 167 °F
• Conductor Wire Size: 14 AWG