VMIC 350-9300007867 VME Backplane Assembly

Module Feature

VMIC 350-9300007867 is a multi-slot VMEbus backplane assembly designed for high-reliability turbine control rack system. It implements VME bus signal routing, power distribution and slot signal termination for 6U VME modules installed in chassis. Built-in power filtering circuits to suppress bus noise, with dedicated power trace layout to guarantee stable power delivery for each VME slot. Supports VME master/slave bus arbitration and J1/J2 connector signal routing. Rugged PCB construction with high anti-interference capability, widely used in gas/steam turbine safety control and high availability industrial VME chassis.

Working principle

The backplane acts as the shared physical bus medium for all VME boards in the chassis. It distributes +5 V, ±12 V power and VME bus signals including address, data, arbitration and interrupt lines to every slot. Bus termination resistors match signal impedance to eliminate signal reflection. When any VME master initiates read/write cycles, signals are transmitted through backplane traces to target slave module.

Onboard components

VME J1/J2 pin header connectors, bus termination resistor network, power filter capacitor array, power distribution traces, signal routing PCB, status test points.

LED indicators

No front panel LED indicators; power and bus status monitored via test points on PCB.

Hardware self-diagnosis

Visual inspection of PCB traces, connectors and solder joints; continuity test for address/data lines; resistance measurement of bus termination network; power rail voltage measurement across each slot; insulation resistance test.

Programming software

No onboard firmware; compatible with standard VMIC VME diagnostic software for bus integrity testing.

Electrical & Process Parameters

Model: 350-9300007867 Device type: Multi-slot VMEbus backplane assembly Bus standard: VMEbus Signal type: VME address, data, arbitration, interrupt signals Control mode: Passive bus interconnection, hardware bus termination Power supply: Chassis power input, distribute +5 V, ±12 V to each slot Cooling: Convection cooling via chassis airflow Protection: Power filter, ESD protection, over-current fuse per slot Mounting: Fixed mounting inside VME chassis Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Chassis internal fixed backplane board Protection class: PCB with optional conformal coating

Environmental

Operating temperature: 0℃ ~ +70℃ Ambient humidity: 5~95% non-condensing Certification: CE compliant Status: VMIC VME turbine control backplane assembly

Installation

Follow ESD safety procedure before handling. Fully power off VME chassis. Mount backplane securely to chassis internal support structure. Lock all J1/J2 connectors and check screw fasteners. Route chassis power cable to backplane power input terminal. Install VME modules one by one and verify slot power voltage before full system power-up.

Interface

VME J1/J2 slot connectors, chassis main power input terminal, bus test signal pins.

Diagnostic

No power on slot: loose power terminal, blown slot fuse, broken power trace. VME bus communication unstable: missing or damaged termination resistors, cracked signal trace, poor connector contact. Cross-slot crosstalk: insufficient power filtering, chassis ground loop interference.

Product Brief

350-9300007867 VMIC VME multi-slot backplane assembly,passive VME bus interconnection and power distribution,for gas and steam turbine high reliability control chassis.