VMIC VMIVME-4100 Analog Output Board

Module Feature

VMIVME-4100 is a single-slot 6U VMEbus digital-to-analog converter board developed by VMIC,channel quantity can be factory configured as 4 / 8 / 12 / 16 channels with 12-bit monotonic DAC resolution. Output range has two main variants: VMIVME-4100-040 for ±10 V and VMIVME-4100-140 for 0~10 V,max output current 5 mA per channel,settling time ≤8 µs to 1 LSB. It adopts double-buffered register design to realize simultaneous update of all analog channels,ensuring synchronous output for multi-axis motion simulation. VME bus interface supports A16/A24 addressing and D08/D16/D32 data transfer,runs as VME slave module. Analog signals can be routed to P2 rear test bus for loopback verification. Each channel integrates short-circuit and overvoltage protection. Rugged Eurocard PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in gas/steam turbine analog setpoint control,servo drive reference output,hardware-in-loop real-time simulation and accelerator test VME chassis.

Working principle

VME host writes digital setpoint codes to double-buffered registers. Once trigger strobe arrives,all DAC channels convert digital codes to analog voltage synchronously. Precision reference circuit guarantees gain and offset accuracy;P2 test bus feeds analog signal back for calibration and verification. VME FPGA completes address decoding and bidirectional data handshake between VME bus and DAC register bank. Output protection circuit limits current under short-circuit field wiring.

Onboard components

VME interface FPGA,12 bit DAC array,double-buffered register bank,precision voltage reference,output buffer amplifier array,P2 analog test bus network,output short-circuit protection,VME J1/J2 edge connector,front-panel 64-pin DIN I/O connector,multi-status LED array.

LED indicators

Front panel LED indicators for board +5 V power and module fault alarm.

Hardware self-diagnosis

Visual inspection of PCB,components and solder joints;board ID register readback verification;DAC full-scale and zero-point calibration test;P2 loopback analog verification;VME A16/A24 read/write communication test.

Programming software

VMIC analog I/O driver library and configuration utility,supports VxWorks,Linux and QNX real-time operating systems;software tool for channel value writing and gain/offset calibration.

Electrical & Process Parameters

Model: VMIVME-4100 Brand: VMIC Device type: 6U VMEbus multi-channel 12-bit analog output module Bus standard: VMEbus, A16/A24 addressing, D08/D16/D32 transfer Resolution:12 bit monotonic Channel:4/8/12/16 factory configurable Voltage range:±10 V (4100-040) / 0~10 V (4100-140),5 mA max per channel Settling time:≤8 µs to 1 LSB Control mode: VME slave access,double-buffered simultaneous update,P2 rear test bus,short-circuit & overvoltage protection Power supply: +5 V from VME backplane,2.5 A typical,3.6 A max Cooling: Convection cooling Protection: Output short-circuit protection,overvoltage protection,ESD protection Mounting: Standard single-height 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Single-slot 6U VME Eurocard Protection class: PCB with optional conformal coating

Environmental

Operating temperature:0℃ ~ +55℃ Storage temperature:-20℃ ~ +85℃ Ambient humidity:20~80% non-condensing Certification: CE compliant Status: VMIC 6U VME 12-bit synchronous analog output board

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-4100 into vacant 6U VME slot and lock front panel ejector latches.Connect analog actuators or signal measurement devices to front 64-pin DIN connector.Power on chassis,load VMIC analog I/O driver,run P2 loopback calibration before commissioning.

Interface

VME J1/J2 backplane connector,front-panel 64-pin DIN analog I/O connector,P2 rear test bus pins,fault status register pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or incorrect base address jumper setting. Channel output drift: need gain and offset recalibration. No analog output: register write failure or output amplifier damage. Output clamped to zero: field wiring short-circuit triggering protection.

Product Brief

VMIC VMIVME-4100 single height 6U VME analog output board,configurable 4~16 channel 12-bit DAC with simultaneous channel update,precision analog voltage output for turbine setpoint control and multi-axis hardware-in-loop simulation VME systems.