Allen-Bradley 1769-PB4 Power Supply | 24VDC 4A/2A CompactLogix

Product Brief – 1769-PB4

The Allen‑Bradley 1769‑PB4 is a Compact I/O power supply for CompactLogix systems. It accepts 19.2–31.2 VDC (nominal 24 VDC) and delivers 4.0 A @ 5 VDC plus 2.0 A @ 24 VDC. This module supports up to 16 I/O modules (8 per side). It includes a 75V reinforced isolation (tested at 1697V DC) and features radiated RF immunity up to 10 V/m across multiple frequency bands. The 1769‑PB4 is designed for DIN rail or panel mounting, with 20G operating shock (DIN) and 30G (panel).

Technical Specifications

• Brand: Allen‑Bradley / Rockwell Automation
• Part Number: 1769‑PB4
• Nominal Input: 24 VDC (range 19.2–31.2 VDC)
• Current Capacity: 4.0 A @ 5V and 2.0 A @ 24V
• Inrush Current: 30 A max @ 31.2 VDC
• Power Consumption: 100 VA @ 24 VDC
• Power Dissipation: 14.5 W @ 60 °C
• Isolation Voltage: 75V continuous (reinforced), tested @ 1697V DC for 1 s
• Fuse Types: Wickmann 19193‑6.3A or Littelfuse 021706.3MXP
• Dimensions: 118 x 70 x 87 mm (4.65 x 2.76 x 3.43 in.)
• Weight: 630 g (1.39 lb)
• Mounting: DIN rail or panel
• Wire Size: 22–14 AWG solid / 22–16 AWG stranded (copper‑90)
• Operating Temp: 0 to 60 °C; Non‑op: -40 to 85 °C
• Humidity: 5–95% non‑condensing
• Shock (op): 20G (DIN) / 30G (panel)
• Vibration: 5G @ 10–500 Hz
• Altitude: 2000 m (6562 ft) max

Installation & Compatibility

• Mounts on standard DIN rail or directly to subpanel.
• Supports up to 8 I/O modules on each side (16 total).
• Works with all 1769 Compact I/O and CompactLogix controllers.
• Use 14 AWG solid copper wire with 90 °C insulation rating.
• Open‑type enclosure – install in a suitable cabinet.

Environmental & Diagnostics

• Radiated RF immunity: 10 V/m (80–2000 MHz, 900 MHz, 1890 MHz, 2000–2700 MHz).
• EFT/B immunity: ±2 kV @ 5 kHz on DC power ports.
• Built‑in fuse protection (field‑replaceable).
• LED indicators for power status and fault detection.
• Diagnostic data accessible via CompactLogix backplane.

Oiltech Controls Review & Insight

• Review: The 1769‑PB4 is a workhorse for CompactLogix systems. Its 4A @ 5V and 2A @ 24V capacity easily handles mixed I/O loads.
• Insight: For systems with high inrush (e.g., solenoid loads), we recommend using the panel mount option for better shock resistance (30G vs 20G).

Suitable Equipment

• CompactLogix controllers (e.g., 1769‑L1x, L2x, L3x).
• 1769 Compact I/O modules – digital, analog, specialty.
• Any Rockwell Automation system requiring 5V/24V bus power.

Frequently Asked Questions (FAQ)

• Q: Can I mix 5V and 24V loads on the same supply?
  A: Yes, the 1769‑PB4 provides separate 5V and 24V current capacities. However, total power should not exceed 100 VA. For high‑current 24V loads (e.g., relays), we suggest using an external 24V supply.
• Q: What fuse type should I use for replacement?
  A: Use Wickmann 19193‑6.3A or Littelfuse 021706.3MXP. Always replace with the same rating to maintain safety and isolation.
• Q: How do I choose between DIN rail and panel mount?
  A: For high‑vibration environments (e.g., compressors), panel mount offers better shock rating (30G vs 20G). DIN rail is easier for quick installation in control cabinets.
• Q: Does this supply support redundant configurations?
  A: No, the 1769‑PB4 is designed for single‑bus systems. For redundancy, use external diode‑based ORing with a second supply.
• Q: What is the maximum number of modules I can power?
  A: You can connect up to 16 modules (8 per side). However, actual count depends on each module’s current draw. Calculate total 5V and 24V loads to stay within 4.0A and 2.0A limits.

Why Buy From Oiltech Controls?

• 15+ years in industrial automation spares.
• Global shipping – FedEx, UPS, DHL.
• All units are tested surplus / refurbished.
• 12‑month warranty on every module.
• Technical verification before shipment.
• Support for obsolete control systems.

Contact Information
Email: info@oiltechcontrols.com
WhatsApp: +86 158 8020 0923

Shipping & Warranty
We ship within 24‑28 hours via FedEx, UPS, or DHL. Each unit includes a 12‑month warranty against defects. Tested surplus/refurbished units are verified prior to dispatch.

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