Description
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Key Technical Specifications
| Parameter | Value |
|---|---|
| Form Factor | Double-height 6U VME Eurocard |
| Bus Interface | VMEbus A24/D32, P1/P2 connectors |
| Channel Count | 64 TTL I/O, split into eight 8-bit ports |
| Direction Control | Configurable per 8-bit port via CSR register |
| I/O Rating | 64 mA sink, 15 mA source per channel |
| Data Transfer | 8-bit, 16-bit, 32-bit bus transfers supported |
| Diagnostics | Built-in test loopback, front panel Fail LED |
| I/O Connectors | Dual DIN 41612 I/O connectors |
| Supply | +5 V DC from VME backplane, max 3.786 A |
| Operating Temperature | 0 °C to +55 °C, non-condensing |
| Storage Temperature | −20 °C to +85 °C |
| Optional Variant | Open-collector output version available |
Product Introduction
The VMIC VMIVME-2510B is a legacy VMEbus Megamodule built for parallel TTL signal interfacing. It splits 64 logic-level lines into eight independent 8-bit ports, and each port can be set as input or output by software. It includes hardware loopback test logic so technicians can validate channel integrity without disconnecting field wiring. The register layout supports compact contiguous address mapping, which fits well in older VME-based test and control chassis.
VMIVME-2510B
VMIVME-2510B
VMIVME-2510B
VMIVME-2510B
Application Scenarios & Field Experience
Many legacy VME test systems use fixed-direction I/O cards. When a test sequence needs to switch between reading sensor status and driving stimulus lines, swapping cards or adding extra modules adds cabinet complexity. This board lets engineers reassign port direction in software without hardware changes.
- Aerospace test benches: TTL stimulus and feedback capture for avionics unit validation.
- Turbine control simulators: Discrete logic signal sequencing for governor and protection I/O emulation.
- Industrial automated test equipment: Parallel digital pattern generation and fault detection.
- Military embedded control racks: General-purpose logic-level discrete control and monitoring.
In my experience, a gas turbine simulator had a VMIVME-2510B develop a stuck port after repeated ESD events on the P2 connector. The controls team loaded the same VxWorks driver configuration to the replacement card, ran the built-in loopback test, and validated all eight ports before restarting simulation runs. The test schedule stayed on track, and they added external transient clamping on the TTL lines afterward.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Origin Inspection: Inspect PCB traces, VME edge fingers, DIN I/O connectors, DIP switch banks, and front panel LED. Reject units with cracked traces or bent connector pins.
- Live Rig Testing: Install in VME test chassis, apply +5 V backplane power, set port directions, toggle each channel, and run BIT loopback test. Confirm Fail LED behavior matches datasheet.
- Register & Revision Verification: Record board hardware revision, switch address settings, and confirm CSR register map matches the installed driver version.
- ESD-Safe Packaging: Fit protective covers on VME and DIN connectors, place in static shielding bag, add foam bracing, mark for ESD-sensitive handling.
Frequently Asked Questions (FAQ)
Q1: Can VMIVME-2510B share a chassis with other VMIC Megamodule cards? A: Yes, it works alongside compatible VME master and I/O Megamodules. Match the address switch settings to avoid VME address conflicts. Q2: What warranty applies to this VMIC VMIVME-2510B? A: We offer a 12-month warranty. Warranty covers hardware defects under rated operating conditions. Damage from ESD, overvoltage on TTL lines, or misconfigured backplane power is excluded. Q3: Is this exact VMIVME-2510B variant stocked? A: This is a discontinued legacy VME part. Stock status changes frequently. Confirm lead time before locking in test stand outage windows. Generic TTL I/O cards are not drop-in substitutes. Q4: Can I change port direction while the VME application is running? A: Direction bits are written through the CSR register at runtime. Make sure the connected TTL circuitry tolerates the state transition when you switch a port from input to output. Q5: Can I hot-swap this VMIVME-2510B while the VME rack is powered? A: Do not hot-swap this VME board. The VME backplane does not support hot insertion. Removal will drop all TTL I/O and can trigger unexpected state changes in connected test hardware.
