VMIC VMIVME-1150 Digital Input Board

Module Feature

VMIVME-1150 (VMIC-1150) is a single-slot 6U VMEbus optically coupled digital input board developed by VMIC (GE Fanuc / Abaco Systems). It provides total 64 independent optocoupler isolated digital input channels,grouped into eight × 8-bit read-only registers. Input voltage supports 5 V,12 V,24 V and 48 V DC field signals,works for both dry contact closure sensing and active voltage source signals. Galvanic isolation rating reaches 1000 V sustained /7500 V pulsed to eliminate ground loop and common-mode surge noise between field sensors and VME backplane. Input filter and logic polarity (positive true / negative true) can be selected via onboard jumpers. Data transfer supports 8-bit or 16-bit mode,compatible with short supervisory or nonprivileged short I/O space access. Board base address is set by DIP switch matrix. Dual front-panel 64-pin connectors are used for field wiring and can mate with VMIACC-BT04 rear transition breakout panel. Input channel status can be read through VME register for built-in BIT diagnostic. Rugged PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in gas/steam turbine discrete status signal collection,aerospace ground test bench and hardware-in-loop real-time simulation VME chassis.

Working principle

When field voltage or dry contact closure is applied to input terminal,optocoupler converts field-side signal into TTL logic level and latches state into onboard input register. The VME master processor reads register value over VME bus to acquire channel status. Jumper-configurable filter suppresses contact bounce and high frequency noise. BIT function reads back raw input register to verify optocoupler and read circuit integrity. VME interface FPGA handles address decoding,register access and data transfer. Optocoupler barrier isolates high transient surge from field side to protect VME backplane.

Onboard components

VME interface FPGA,sixteen optocoupler banks,8 × 8-bit input register array,jumper-selectable digital filter network,logic polarity selection circuit,DIP switch address setting hardware,VME J1/J2 edge backplane connector,dual front-panel 64 pin I/O connectors.

LED indicators

No per-channel LED; system fault and bus access status can be monitored by VME register BIT readback.

Hardware self-diagnosis

Visual inspection of PCB,components and solder joints;board ID register readback verification;BIT channel status readback test;VME A16 register communication validation;insulation resistance test between field side and backplane.

Programming software

VMIC universal I/O driver UIOD (VMIVME/SW-9390),supports VxWorks,Linux and QNX real-time operating systems;software tool for channel status readout,filter configuration and BIT fault log reading.

Electrical & Process Parameters

Model: VMIC-1150 (VMIVME-1150) Brand: VMIC (GE Fanuc / Abaco) Device type: 6U VMEbus single-width 64-channel optically coupled digital input module Bus standard: VMEbus, A16 short addressing, D08/D16 data transfer Channel:64 opto-isolated digital input,8 groups × 8 bit Field input voltage:5–48 V DC Isolation rating:1000 V continuous /7500 V pulsed galvanic isolation Input mode: Voltage sourcing / current sinking, positive / negative true logic selectable Filter: Jumper configurable, multiple time constant options Control mode: VME slave access, DIP switch address setting, 8/16-bit transfer select, BIT register readback,optical isolation surge protection Power supply: +5 V from VME backplane, typical 1.1 A Cooling: Convection cooling Protection: Channel ESD clamping,optocoupler galvanic isolation 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:-40℃ ~ +85℃ Ambient humidity:5~95% non-condensing Certification: CE compliant Status: VMIC 6U VME high-isolation 64-channel opto-coupled digital input board

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-1150 into vacant 6U VME slot and lock front panel ejector latches.Set DIP switch for board base address,configure jumpers for filter and logic polarity.Mate field wiring to dual 64-pin front connectors or pair with VMIACC-BT04 rear transition panel.Power on chassis,load VMIC UIOD driver,run BIT register readback diagnostic before commissioning.

Interface

VME J1/J2 backplane edge connector,dual front-panel 64 pin I/O connectors,channel status and fault BIT register pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or incorrect DIP base address setting. BIT channel readback failure: optocoupler burnout or input register hardware fault. Always-on / always-off input: field wiring open/short or logic polarity jumper misconfiguration. Flickering unstable input: missing input filter or noisy unshielded field cable.

Product Brief

VMIC VMIVME-1150 single height 6U VME digital input board,64 opto-isolated DI channels with 5–48 V DC wide input and 1000 V galvanic isolation,supports jumper filter and polarity selection,built-in BIT register readback,provides high noise immunity discrete signal acquisition interface for turbine status monitoring and aerospace hardware-in-loop simulation VME systems.