Get now: Allen-Bradley 1769-PB2 Compact I/O 24V DC Power Supply
Atlantechdrives provides you the 1769-PB2, the primary DC-to-DC power supply module for the CompactLogix and MicroLogix 1500 family. This module is essential for installations where 24V DC is the standard control voltage, allowing the PLC system to run directly from plant DC power without the need for an AC-to-DC converter within the rack.
- Input Voltage: 19.2V to 31.2V DC
- Output Current: 2.0A @ 5V DC and 0.8A @ 24V DC
- Input Protection: Reverse Polarity and Surge Protection
- Operating Current: 2.1A @ 24V DC
- Isolation: 30V (continuous)
- Bus Power: Regulated output for CompactBus
Technical Performance: Stable DC-to-DC Conversion for Logix Systems
Procure now the 1769-PB2 to maintain a unified 24V DC control architecture. This module is engineered to take a wide-range DC input and convert it into the stable, filtered 5V and 24V rails required by the 1769-series backplane. The 1769-PB2 is particularly technically superior in mobile applications or battery-backed systems where the input voltage might fluctuate. It includes internal noise filters that prevent field-side DC ripple from interfering with high-speed logic execution. When you order the 1769-PB2, you are securing a power module that features integrated reverse-polarity protection, ensuring that an accidental wiring swap during field installation will not damage the internal circuitry or the expensive CPU mounted next to it.
Installation Advice: Wiring for Polarity and Distance
When installing the 1769-PB2, ensure that you use a high-quality, regulated 24V DC source. While the module can handle up to 31.2V, prolonged exposure to high voltage will increase thermal stress. The 1769-PB2 has a distance rating of 8 modules; for expansion banks, verify that the 24V supply wires are of sufficient gauge (14-16 AWG) to minimize voltage drop before the power reaches the PB2 terminals. Sourcing your 1769-PB2 from Atlantechdrives ensures you get a unit with high-integrity terminal blocks, preventing intermittent power loss due to loose mechanical connections.
Maintenance and Hardware Integrity
The 1769-PB2 includes a green LED to signify the presence of output power. Maintenance should include periodic checks for dust accumulation on the cooling vents. In environments with high vibration, verify that the DIN rail anchors are secure to prevent the 1769-PB2 from shifting and breaking the bus connection. Sourcing from Atlantechdrives provides the reliability and precision required for 24/7 industrial uptime in DC-native environments.
FAQs
Q: Can the 1769-PB2 be used with 48V DC?
A: No, the maximum input voltage is 31.2V DC. For 48V, an external step-down converter is required.
Q: Does the PB2 power the field sensors?
A: No, it powers the internal logic of the modules via the backplane. Field sensors usually require their own external 24V DC distribution.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
This high-performance DC power supply provides stable backplane current for architectures managed by a 1769-L30ER controller.
