Configured for backup power continuity in UCN/HPM/APM assemblies, the Honeywell 51303948-100 (51303948-100 battery bank) provides direct physical/electrical execution of 48 VDC reserve supply during primary feed loss. The module integrates a disconnect connector that maintains uninterrupted delivery to HPM/APM equipment and supports stable rack‑mounted battery operation.
Hardware Specifications
Parameter
Specification
Model
51303948-100
Brand
Honeywell
Origin
Not specified
Weight
34 lbs (net), 17 kg (shipping)
Dimensions
Not specified
Operating Temp
Not specified
Power Consumption
Passive battery bank; no active draw until discharge
Core Performance Indicators
48 VDC UCN backup battery bank with continuous feed connector
4-20 mA HART Loop Protocol Behavior
Although the 51303948-100 does not process analog loops directly, its 48 VDC reserve output stabilizes power availability for HPM/APM modules that host 4-20 mA HART channels. Maintaining uninterrupted supply prevents loop sag, burst packet corruption, and channel isolation faults during transfer from primary to backup feed. The battery bank’s discharge profile ensures predictable voltage behavior, reducing noise coupling into cold junction compensation routines and preventing transient disturbances across adjacent channels.
Frequently Asked Questions
Q: Can the 51303948-100 be hot-swapped while the UCN chassis is energized? A: Battery banks should not be removed under live conditions. Disconnecting under load may interrupt HPM/APM supply rails and cause controller resets.
Q: Does the battery bank influence backplane current distribution? A: It supplies reserve voltage to the power feed path but does not alter regulated backplane current limits. Distribution remains governed by the primary supply modules.
Q: Is firmware or configuration required for operation? A: No. The unit is a passive hardware assembly and does not contain firmware or configurable logic.
Field Installation Guidelines
Mount the battery rack in a stable cabinet location with adequate ventilation clearance.
Ensure the disconnect connector is fully seated before energizing the system.
Route battery cabling separately from low-level analog conductors to minimize induced interference.
Bond the rack frame to the cabinet grounding bar to reduce transient propagation during discharge events.
Verify polarity alignment before connecting to HPM/APM feed terminals.
