General Information

Core Description

The 115M7750-01 is a high-performance Bently Nevada high voltage DC Power Input Module (PIM) designed exclusively for the 3500/15 power supply line. Fully compatible with standard 3500 machinery protection racks, this half-height module works seamlessly with the 114M5329-01 DC supply to deliver robust 88 to 140 Vdc line filtration, internal overvoltage protection, and stable backplane power distribution without interrupting ongoing monitoring operations.

Specific Application

· Providing secure rear-chassis power termination and line conditioning for high-potential 110 VDC to 125 VDC industrial plant utility buses.

· Establishing a fully redundant, isolated high-voltage direct current power infrastructure within critical automated monitoring racks.

· Deploying machinery protection systems in hazardous operational areas requiring strict ATEX, IECEx, and Class I Division 2 certification compliance.

Ordering Information

System Compatibility

· Chassis Architecture: Installs into designated half-height Power Input Module slots on the rear left side of a standard 3500 protection rack.

· Companion Supply: Pairs exclusively with the matching 3500/15 High Voltage DC Power Supply Module (part number 114M5329-01).

· Operating Thresholds: Accepts direct current input feeds strictly ranging from 88 to 140 Vdc.

Alternative Models & Functional Differences

· 115M7750-01 (This Module): Tailored specifically for high-voltage direct current infrastructure networks with a maximum full rack current draw of 2.5 A.

· Low Voltage DC PIM (114M5335-01): Configured to process low-potential direct current sources between 20 and 30 Vdc, demanding a much higher current draw up to 11.0 A.

· Universal AC PIM (106M1081-01): Built to accept alternating current grids (110 to 220 Vac nominal) and completely incompatible with direct current backplane setups.

· Legacy High Voltage DC PIM (129478-01): Older generation line hardware that is completely incompatible with the newer 115M7750-01 component group or its associated power supply module.

Installation & Troubleshooting FAQ

Q1: Does removing or inserting this PIM or its companion power supply disrupt ongoing machinery monitoring?

A: No. Removing or inserting either module does not disrupt the operation of the rack as long as a second redundant power supply is installed and working.

Q2: What safety response takes place if the incoming DC link experiences an over-voltage spike?

A: For all power supply options, an under-voltage state does not harm the unit, but an over-voltage event causes the internal protection fuse on the PIM to open.

Q3: How are primary and backup power routing paths managed when two supplies occupy the same rack?

A: When two modules are installed together, the one in the lower slot acts as the primary supply, and the other in the upper slot handles the backup supply tasks.

Q4: Why is my 3500/15 rack failing to turn on when using a discharged high-voltage plant utility source?

A: The input voltage must remain strictly above the 88 Vdc threshold. Under-voltage lines will not harm the PIM but will block the power supply from achieving proper regulation.

Q5: What maximum full rack current draw constraints must field engineers plan for when sizing cabling for this module?

A: Under full rack load conditions, the high voltage DC power path draws a maximum current of 2.5 A, requiring lower current capacity allocations compared to the low-voltage DC variant.