VMIC VMIVME-2510B Digital I/O Board

Module Feature

VMIVME-2510B is a single-slot 6U VMEbus TTL digital input/output Megamodule developed by VMIC. It provides total 64 TTL I/O channels,divided into eight independent 8-bit ports;each port can be individually programmed as input or output. Sink current reaches 64 mA and source current 15 mA per channel;optional open-collector output variant is available. VME bus interface supports A16 short addressing and 8/16/32 bit data transfer,operates as VME slave. Dual address DIP switches configure CSR and I/O register address,multiple boards can be set to contiguous I/O address mapping to optimize system memory usage. Built-in BIT logic supports online readback of output status and offline independent test for each 32-bit I/O bank. When entering offline test mode,all outputs are tri-stated to protect external field devices. Front panel fault LED indicates diagnostic failure status. Rugged Eurocard PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in gas/steam turbine discrete signal interlock control,aerospace ground test bench and hardware-in-loop real-time simulation VME chassis.

Working principle

VME host writes port direction configuration and output logic state to control registers. For output channels,TTL driver transmits logic signal to field devices;for input channels,board samples external TTL level and feeds data back to VME bus. BIT function reads back output register in real time to compare expected value and actual state. In offline test mode,output drivers are tri-stated and internal test circuit verifies I/O path integrity. VME FPGA completes address decoding and bidirectional data handshake between VME backplane and I/O register bank. Overvoltage and ESD protection suppress transient voltage on field wiring.

Onboard components

VME interface FPGA,eight ×8-bit I/O port register array,TTL driver/receiver network,BIT self-test logic,dual address DIP switch banks,ESD & overvoltage protection,VME J1/J2 edge connector,front-panel dual DIN 64-pin I/O connectors,fault status LED.

LED indicators

Front panel LED indicators for module fault alarm.

Hardware self-diagnosis

Visual inspection of PCB,components and solder joints;board ID register readback verification;online output readback test;offline tri-state channel verification;VME A16 read/write communication test.

Programming software

VMIC digital I/O driver library and configuration utility,supports VxWorks,Linux and QNX real-time operating systems;software tool for port direction setup and BIT fault log reading.

Electrical & Process Parameters

Model: VMIVME-2510B Brand: VMIC Device type: 6U VMEbus 64-bit TTL digital I/O module Bus standard: VMEbus, A16 addressing,8/16/32 bit data transfer Channel:64 TTL I/O,8 ×8-bit individually configurable ports I/O level:TTL 0~5 VDC Drive capacity:64 mA sink /15 mA source per channel Control mode: VME slave access,per-port direction programming,contiguous multi-board address mapping,BIT online/offline self-test,ESD & overvoltage protection Power supply: +5 V from VME backplane Power consumption: 5 W typical Cooling: Convection cooling Protection: Per-channel ESD protection,overvoltage clamping,output tri-state for test safety 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℃ ~ +70℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:20~80% non-condensing Certification: CE compliant Status: VMIC 6U VME 64 channel TTL digital I/O board

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-2510B into vacant 6U VME slot and lock front panel ejector latches.Set DIP switches for CSR and I/O base address according to system plan.Connect field TTL digital devices to dual DIN front connectors.Power on chassis,load VMIC digital I/O driver,run BIT diagnostic before commissioning.

Interface

VME J1/J2 backplane connector,front-panel dual 64-pin DIN TTL I/O connector,fault status register pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or incorrect DIP address setting. BIT fault alarm: I/O channel stuck high/low or driver hardware damage. No output drive: port direction register misconfigured or output driver burnout. Input reading abnormal: external signal level mismatch or input receiver failure.

Product Brief

VMIC VMIVME-2510B single height 6U VME TTL digital I/O board,64 channels split into eight independently configurable 8-bit ports with BIT online/offline self-test,provides high density discrete TTL signal interface for turbine interlock control and hardware-in-loop simulation VME systems.