Procure now: Allen-Bradley 1769-PB4 High-Output DC Power Supply Module
Atlantechdrives provides you the 1769-PB4, the most powerful DC-input power supply available for the CompactLogix and MicroLogix 1500 platforms. This module is specifically engineered to support high-density I/O configurations and large expansion banks that demand significant current on the 5V and 24V DC backplane rails.
- Input Voltage: 19.2V to 31.2V DC
- Output Current: 4.0A @ 5V DC and 2.0A @ 24V DC
- Isolation Voltage: 30V (continuous)
- Inrush Current: 30A @ 24V DC
- Mounting: DIN-rail or Panel Mount
- Power Supply Distance Rating: 8 modules
Technical Performance: Doubling the Power for Complex Racks
Purchase now the 1769-PB4 to ensure the electrical stability of your high-performance PLC system. The 1769-PB4 is a technical necessity for racks populated with power-hungry modules such as high-density 32-point I/O or advanced analog cards. While the standard PB2 offers 2.0A at 5V, the 1769-PB4 doubles this capacity to 4.0 Amps. This increased current headroom prevents «Low Bus Voltage» faults and intermittent communication drops that often occur when a power supply is pushed to its thermal limits. The module incorporates sophisticated DC-to-DC conversion circuitry with integrated over-current and reverse-polarity protection. When you secure the 1769-PB4, you are opting for an industrial-grade power engine that filters out DC ripple and transients, providing the pristine energy required for the Logix5000 processor’s deterministic execution.
Expert Tips: Managing Multi-Bank Power Budgets
When installing the 1769-PB4 in a multi-rack system, remember that expansion cables (1769-CRR/CRL) do not carry enough current to power remote modules. Each bank requires its own power supply. For a system utilizing the 1769-PB4, we recommend using a 14 AWG wire for the 24V DC input to minimize voltage drop between the primary DC source and the PB4 terminals. If the input voltage drops below 19.2V DC, the PB4 may struggle to maintain the 5V rail, causing the CPU to fault. Sourcing your 1769-PB4 from Atlantechdrives ensures you receive a unit with factory-certified output regulators, guaranteeing maximum uptime for your expanded I/O banks.
Maintenance and Thermal Reliability
The 1769-PB4 generates significant heat during 4A operation. Maintenance protocols must include verifying that the ventilation slots are unobstructed. A solid green «PWR» LED indicates the DC-to-DC converter is active. If the LED flickers, it typically indicates a short circuit on the backplane or an overloaded rail. Sourcing an authentic 1769-PB4 from Atlantechdrives provides the hardware reliability and safety standards required for 24/7 mission-critical industrial automation.
FAQs
Q: What is the main difference between 1769-PB2 and 1769-PB4?
A: The 1769-PB4 provides double the current on the 5V backplane rail (4.0A vs 2.0A), making it suitable for larger I/O banks.
Q: Can I use the 1769-PB4 with AC power?
A: No, this is a DC-input module. For AC power applications, use the 1769-PA4.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
To ensure maximum uptime in large I/O configurations, pair this high-capacity DC supply with a CompactLogix 1769-L33ER brain.
