Features:
- Power Expansion for 1769 Compact I/O System Backplanes
- Delivers Regulated Dual DC Voltage Output Across Left and Right Bus Directions
- Integrates with CompactLogix Controllers and 1769 Expansion I/O Modules
The Allen Bradley 1769-PB2 Compact I/O Expansion Power Supply operates as a dedicated DC expansion power unit within a 1769 Compact I/O system, providing regulated power directly to connected modules across the system backplane. It converts an incoming DC input voltage range of 19.2 to 31.2 V DC into standard system bus power, distributing up to 2 A at 5V DC and 1 A at 24V DC in both directions. Designed with a Reinforced Insulation Type structure, the module features a continuous isolation voltage of 75V and undergoes factory routine testing at 1697V DC for 1 second between the DC input and the system backplane, ensuring stable operational safety for adjacent controller and I/O hardware.
The 1769-PB2 provides essential system bus current required when expanding I/O banks beyond the current capacity of the primary controller supply, directly supporting proper operation of high-density I/O configurations. To maintain safe bus distribution, the module has a power supply distance rating of 8, meaning a maximum of 8 I/O modules can be installed on either side of the supply. The unit is designed for panel or DIN rail mounting within the Compact I/O structure, serving as an intermediate power node in multi-bus system layouts.
For system configurations requiring extended I/O capacity, the 1769-PB2 enables additional module expansion by supplementing backplane current where total system draw exceeds primary limits. When integrated into an expanded Compact I/O rack, the supply powers adjacent digital, analog, or specialty I/O modules up to its maximum current limits (2 A @ 5V DC / 1 A @ 24V DC). System integrators must perform a complete backplane load calculation across both voltage buses to ensure the connected modules stay within these specified electrical parameters and maintain proper Class 1 protective earth grounding for safety compliance.
The 1769-PB2 Allen Bradley Compact I/O Expansion Power Supply may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen Bradley 1769-PB2 Compact I/O Expansion Power Supply Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Allen Bradley 1769-PB2 Compact I/O Expansion Power Supply Specs
General
- Manufacturer Bently Nevada
- Model 1769-PB2
- Condition New Original ready stock
- Product Family 1769-PB2K,1769-PB4,1769-PA2
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Distributed I/O Banks: Powers secondary and tertiary Compact I/O banks when branching out from a central controller using expansion cables.
- CompactLogix Systems: Supplements CompactLogix 1769 controllers (like the 1769-L32E or 1769-L35E) when the system’s total module power consumption exceeds the processor's built-in power capacity.
- MicroLogix 1500 Expansion: Provides backplane power for specialized, high-density, or isolated 1769 expansion modules connected to a MicroLogix 1500 base assembly.
- Network Adapter Assemblies: Acts as the local power source for distributed I/O chassis utilizing 1769-AENTR Ethernet or 1769-ADN DeviceNet adapters.
- Input Voltage Range: Operational between 19.2V DC and 31.2V DC (24V DC nominal input).
- Operating Temperature: Safe for operation between 0 °C and 60 °C (32 °F to 140 °F).
- Relative Humidity: Built for non-condensing industrial environments with up to 95% relative humidity.
- Atmospheric Environment: Intended for clean, dry locations classified under Pollution Degree 2 and Overvoltage Category II limits.
- Hazardous Area Approvals: Standard versions are UL-listed for use in Class I, Division 2 (Groups A, B, C, D) hazardous industrial sites.
- Distance Rating Control: Enforces a hardware restriction where modules must be placed within a maximum of 8 slots from either side of the power supply.
- LED Status Indicator: Features a front-facing diagnostic LED indicator that glows green during standard healthy operations to confirm proper voltage output.
- Internal Protection Control: Equipped with built-in, non-user-replaceable fuse overcurrent protection to prevent catastrophic backplane or module damage during an electrical short.
- Bus Lock Lever: Integrates a mechanical bus connector lock lever to ensure solid communication and grounding connectivity across the tongue-and-groove system backplane.