51196895-100 Hard Drive Unit | Honeywell

The Honeywell 51196895-100 Hard Drive Unit is a mass storage component engineered for real-time system data logging and software storage within Honeywell LCN System platforms. Providing direct physical and electrical execution, this drive offers a formatted capacity of 1.8 GB and incorporates isolated interface electronics to maintain signal integrity across backplane buses.

Hardware Specifications

Signal Isolation and Backplane Protection

The drive assembly integrates internal power supply noise filters and isolated interface electronics to prevent ground loop currents and high-frequency switching transients from leaking into system power rails. By neutralizing electrical crosstalk generated during disk spin-up or head positioning, the unit protects adjacent analog I/O modules processing sensitive 4-20 mA HART loop protocol telemetry across the backplane bus.

Field Installation Guidelines

Power down the node rack power supply before inserting or removing the drive assembly.

Observe anti-static precautions and wear a grounded wrist strap when handling the unit to protect onboard controller logic from ESD damage.

Slide the assembly along chassis guide tracks until the interface header seats completely into the backplane mating socket.

Tighten all front panel retaining screws to secure mechanical ground continuity and prevent vibration damage during drive operation.

Frequently Asked Questions

Q: How is physical power delivered to the 51196895-100 hard drive assembly?

A: Power is supplied directly via the LCN chassis backplane connector, which feeds regulated 5 VDC logic and 12 VDC spindle motor rails to the drive mounting tray.

Q: Can the 51196895-100 drive be hot-swapped while the LCN node is actively processing?

A: No, power to the local node shelf or disk carrier bay must be de-energized prior to removing or installing the hard drive module to prevent file system corruption and interface bus surges.