Honeywell 51303968-100 CMOS Battery Backup Assembly

The Honeywell 51303968-100, also cataloged as the 51303968-100 CMOS Battery Backup Assembly, provides rechargeable backup power for CMOS memory in Honeywell PM/APM and PKS distributed control systems. It maintains configuration data, hardware parameters, and real-time clock information during system power interruptions.

Hardware Specifications

CMOS Memory Backup and Charge Monitoring

The 51303968-100 uses a rechargeable battery system to maintain CMOS memory when the primary system power source is interrupted. The backup circuit is associated with preservation of configuration data, hardware parameters, and real-time clock information.

Integrated charge monitoring supports observation of the rechargeable battery condition. The available source data does not specify the battery capacity, nominal backup voltage, recharge current, recharge time, or guaranteed memory-retention duration; these values should therefore be verified against the applicable Honeywell hardware documentation before installation.

Frequently Asked Questions

Q: What type of power source does the 51303968-100 use?
A: It uses a rechargeable battery system for CMOS memory backup. The supplied data does not specify the battery voltage or capacity.

Q: What system information is maintained during a power interruption?
A: The assembly is specified to maintain CMOS memory containing configuration data, hardware parameters, and real-time clock information.

Q: Is the module intended for direct board-level installation?
A: Yes. The supplied information identifies the 51303968-100 as a board-level CMOS Battery Backup Assembly for integration into Honeywell PM/APM and PKS DCS hardware. Mechanical mounting and connector requirements should be checked against the applicable system documentation.

Field Installation Guidelines

• Verify the Honeywell part number and hardware revision before installation.
• Disconnect applicable system power according to the equipment maintenance procedure before accessing the board.
• Install the assembly using the specified mounting points and connectors for the host Honeywell hardware.
• Avoid contact with exposed circuit-board conductors and battery terminals during handling.
• Route associated wiring away from high-current conductors, switching devices, and other sources of electrical interference.
• Maintain proper cabinet grounding and bonding practices for the host DCS equipment.
• Do not substitute a battery with a different chemistry, voltage, capacity, or charging characteristic unless the applicable Honeywell documentation explicitly permits the substitution.
• After installation, verify that the backup assembly is correctly recognized by the host hardware and that the CMOS retention function operates as specified by the system documentation.
• Because the supplied data does not define a guaranteed backup duration, recharge interval, or replacement procedure, these parameters should be obtained from the applicable Honeywell maintenance documentation.