Allen Bradley 1769-PB4

Brand：Allen Bradley
Model：1769-PB4

Inventory situation: Goods are available in stock.

Application Scenarios

In assembly factories, the 1769-PB4 regulates conveyor belt motors to modify speed based on production requirements. For example, an auto parts plant utilizes it to reduce conveyor speed to 1.2 m/s for quality inspection before increasing it to 3 m/s for high-speed packaging. Its V/F control mode ensures consistent motor performance, cutting belt slippage by 20% and increasing material handling efficiency. The module's tiny size (100 mm width) fits neatly into tight control panels, saving 30% more space than earlier motor controllers.

Packaging equipment relies on the 1769-PB4 for precise motion control. In a snack food business, it drives motors for filling and sealing machinery, guaranteeing each bag contains exactly 500 g of goods (accuracy ±1 gram). The module's vector control capability enables rapid acceleration (0 to 1,500 RPM in 0.5 seconds) for high-speed labeling machines, decreasing downtime between product changes. Maintenance teams use the built-in diagnostics to detect motor defects, such as overheating (which triggers alerts at 120°C), avoiding costly production shutdowns.

The 1769-PB4 is used in warehouses and distribution facilities to operate roller conveyors and automated storage systems. For example, a logistics center uses it to operate motors that move big pallets (up to 1,000 kg) while smoothly altering speed to prevent cargo damage. The module's DC injection braking capability stops motors in 2 seconds, enhancing positioning precision for robotic arms that pick products off shelves. This connection with Allen-Bradley PLCs decreases energy usage by 15% because motors only run when necessary.

The 1769-PB4 optimizes commercial HVAC systems by managing fan and pump motors. A huge office building utilizes it to vary fan speed based on room occupancy: 1,000 RPM during peak hours and 600 RPM at night, reducing energy consumption by 25%. The module's soft start/stop function reduces electrical stress on motors, increasing their lifespan by 20%. It also utilizes temperature sensors to ensure indoor comfort (22-24°C) while adhering to energy efficiency standards such as ASHRAE 90.1.

Specifications

Dimensions	118mm × 70mm × 87mm
Voltage Input	19.2 - 31.2V DC
Multiple Protections	Short-circuit / Overvoltage / Surge Protection
Global Certifications	UL 508, CE, CCC
Surge Current	30A (at 31.2V DC)
Total Power	14.5W (at 60°C)
Weight	630g
Installation Method	DIN Rail / Panel
Operating Temperature	0°C to 60°C

Product features

The Allen-Bradley 1769-PB4, the CompactLogix series' flagship power supply module, features a wide voltage input range of 19.2-31.2V DC and dual outputs of 5V and 24V, making it an excellent choice for small to medium control systems. Whether for complicated logic control in discrete manufacturing production lines or for use in high-humidity situations onboard vessels, the 1769-PB4 offers dependable all-weather stability with a total power output of 14.5 W and a military-grade protection design.

The 1769-PB4 includes a built-in 6.3A replacement fuse (compatible with the Wickmann 19193 model), as well as over-voltage and short-circuit protection systems that may instantly disconnect abnormal circuits to avoid fault spread. Its aluminum alloy housing and clever temperature management construction boost heat dissipation efficiency while also efficiently resisting electromagnetic interference (EMI) and dust incursion.

The 1769-PB4 is 118 mm × 70 mm × 87 mm, making it the most space-efficient option available. The module supports both 35mm DIN rail and panel mounting, allowing for easy adaptability to various cabinet layouts. Its unique dual-side expansion capability allows a single power supply module to power up to 16 1769 series I/O modules (including the 1769-IA16 digital input module), considerably lowering deployment costs for numerous devices.

As a key component of the CompactLogix ecosystem, the 1769-PB4 is completely compatible with the 5380/5480 series controllers and supports high-speed data transmission via the EtherNet/IP protocol. The Studio 5000 Logix Designer program enables users to monitor past fault logs, precisely assess the causes of overload or short-circuit events, and cut the mean time to repair (MTTR) by 70%.

FAQ

Q: What is the Allen Bradley 1769-PB4 power supply module?

A: The Allen-Bradley 1769-PB4 is a Compact I/O power supply module designed for use with the CompactLogix control system and MicroLogix 1500 controllers. It is externally powered by a 24V DC input and provides regulated 5V DC and 24V DC power to the 1769 I/O modules mounted on either side. This module is classified as an open-type device and mounts either on a DIN rail or directly onto a panel.

Q: What are the complete electrical specifications of the 1769-PB4?

A: The 1769-PB4 operates with a nominal input voltage of 24V DC and an input voltage range of 19.2–31.2V DC. Current capacity is 4.0A at 5V DC and 2.0A at 24V DC. Power consumption is 100 VA at 24V DC, with power dissipation of 14.5W at 60°C. Maximum inrush current is 30A at 31.2V DC. Isolation voltage is 75V continuous with reinforced insulation type, requiring IEC Class 1 grounding. The module is routinely tested at 1697V DC for 1 second, DC power input to the system.

Q: What are the physical dimensions and weight of the 1769-PB4?

A: The dimensions of the Allen Bradley 1769-PB4 are 87mm in height, 70mm in width, and 118mm in depth (approximately 3.43 x 2.76 x 4.65 inches). Weight is approximately 630 grams (1.39 pounds).

Q: How many I/O modules can the 1769-PB4 support?

A: The 1769-PB4 supports a maximum of eight I/O modules on each side of the power supply, for a total of up to 16 modules. The power supply distance rating is 8 modules, meaning up to eight I/O modules can be placed on each side before additional power is required. The maximum current that can be distributed from either side of any 1769 power supply is limited by the 1769 Compact I/O Bus to 2 amps at 5V DC and 1 amp at 24V DC per side.

Q: What is the difference between 1769-PB4 and 1769-PB2?

A: The primary difference is output current capacity. The 1769-PB2 provides 2A at 5V DC, while the 1769-PB4 provides 4A at 5V DC and 2A at 24V DC. For systems with more than 6–8 I/O modules or any high-current modules, the PB4 is recommended to ensure stable operation and allow room for future expansion. Insufficient amperage can cause the system to fault. Both power supplies distribute power identically-each can provide up to 2A at 5V DC and 1A at 24V DC to either side due to the limits of the compact I/O bus.

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