Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | MVME-340 |
| Manufacturer | Motorola |
| Product Category | 3U VMEbus Counter/Timer Module |
| Counter/Timer Channels | 8 Independent Channels |
| Counter Resolution | 16 Bits |
| Input Signal Type | TTL/CMOS, Optically Isolated (5-24V DC) |
| Counting Range | 0 to 65535 (Up/Down Counting Configurable) |
| Time Base Options | Internal (1MHz, 100kHz, 10kHz, 1kHz) / External |
| Output Signal Type | TTL/CMOS (Open Collector) |
| Isolation Voltage | 1500V AC (Input to Backplane) |
| VMEbus Interface | VMEchip1 Controller (Slave, 16-bit Data Bus) |
| Form Factor | 3U Eurocard (Single-slot VME Standard) |
| Operating Temperature Range | -40°C to +85°C |
| Power Requirements | 5V DC ±5%, ±12V DC ±10% |
| Diagnostic Features | Channel Status LEDs, Overflow Detection |
Motorola MVME-620
Product Introduction
The **Motorola MVME-340** is a versatile 3U VMEbus counter/timer module designed for industrial automation systems requiring precise event counting and time-based control. As a key member of Motorola’s MVME300 series, it integrates 8 independent 16-bit counter/timer channels, providing a reliable solution for applications such as position tracking, event counting, and interval timing in mission-critical industrial environments.
With support for both TTL/CMOS and optically isolated (5-24V DC) input signals, the **Motorola MVME-340** adapts to diverse sensor types, while configurable up/down counting and multiple time base options (internal 1MHz to 1kHz or external) offer flexible operation. Its 1500V AC isolation between inputs and the backplane ensures protection against electrical noise and ground loops, enhancing system stability. The VMEchip1 interface enables seamless integration into VMEbus-based control systems as a slave device, facilitating real-time data exchange with host CPUs. Designed to operate in -40°C to +85°C environments, this module delivers consistent performance in harsh industrial settings.
Core Advantages & Technical Highlights
Multi-Channel Precision Counting: Featuring 8 independent 16-bit counter/timer channels, the **Motorola MVME-340** enables simultaneous counting or timing of multiple events. The 16-bit resolution ensures accurate measurement of counts up to 65535, making it suitable for applications requiring fine-grained position or event tracking.
Flexible Input/Output Options: Support for both TTL/CMOS and optically isolated input signals eliminates the need for external signal conditioning, simplifying integration with different sensor types. Open collector TTL/CMOS outputs allow direct connection to external relays or indicators, providing versatile control capabilities.
Configurable Operation Modes: Each channel can be configured for up or down counting, and users can select from internal time bases (1MHz, 100kHz, 10kHz, 1kHz) or an external time source. This flexibility makes the module adaptable to a wide range of applications, from high-speed event counting to long-interval timing.
Industrial-Grade Reliability: Operating from -40°C to +85°C, the **Motorola MVME-340** withstands extreme temperatures, vibration, and electromagnetic interference (EMI) common in manufacturing plants, material handling systems, and automotive test facilities. Its rugged construction and high-quality components ensure long-term stable operation, minimizing unplanned downtime.
Seamless VMEbus Integration: The VMEchip1 controller supports 16-bit VMEbus data transfers, ensuring compatibility with legacy VMEbus systems. As a slave device, it responds promptly to host commands, enabling timely read/write operations for counter values and configuration settings, maintaining system synchronization.
Typical Application Scenarios
Position Tracking in Material Handling: In conveyor systems for warehouse automation, the **Motorola MVME-340** counts pulses from rotary encoders (inputs) to track the position of pallets or packages. Configured for up counting, each channel monitors a separate conveyor section, and the module transmits position data to the host CPU for precise stop/start control. Overflow detection alerts the system to unexpected encoder signal loss.
Event Counting in Manufacturing: In automotive part assembly lines, the module counts the number of components placed (e.g., bolts tightened, sensors installed) via proximity sensor inputs. Each channel corresponds to a specific assembly step, and the host system uses the count data to verify production completeness. Optically isolated inputs ensure reliable operation near high-noise welding equipment.
Interval Timing in Test Equipment: In electronics test benches, the **Motorola MVME-340** provides precise interval timing for component stress tests. Using the internal 1MHz time base, channels generate timed pulses to trigger test sequences (e.g., voltage application, signal sampling). Open collector outputs directly control test equipment relays, ensuring synchronized test operations.
Speed Monitoring in Motor Control: In industrial motor control systems, the module counts encoder pulses over a fixed time interval to calculate motor speed. Configured with an external time base from a system clock, each channel monitors a separate motor, and the host CPU uses the speed data to adjust motor drives for load balancing. Channel status LEDs simplify on-site troubleshooting of encoder connections.
Motorola MVME-620
Related Model Recommendations
Motorola MVME-341: Higher-channel counter/timer module with 16 channels, ideal for scaling up systems from **Motorola MVME-340**.
Motorola MVME-162-01: 3U VMEbus CPU module compatible with **Motorola MVME-340**, serving as the host for count data processing and control.
Motorola MVME-372: Low-density digital I/O module, working with **Motorola MVME-340** to add discrete input/output capabilities for system control.
GE VMIVME-7650: Analog I/O module complementary to **Motorola MVME-340**, adding analog data acquisition for temperature or pressure monitoring alongside counting.
Motorola MVME-197LE: Memory expansion module for host CPUs, increasing storage for count data logs collected by **Motorola MVME-340**.
Motorola MVME-605: Next-generation PowerPC SBC, pairing with **Motorola MVME-340** for upgraded control systems requiring higher processing power for complex count data analysis.
Installation & Maintenance Guidelines
Installation Preparation: Before installing the **Motorola MVME-340**, ensure the VMEbus chassis is powered off and properly grounded. Align the module with the 3U slot guides, verifying P1/P2 backplane connector alignment. Gently insert until fully seated, then fasten front-panel screws to prevent vibration-induced disconnections. For wiring, use shielded cables for input channels; connect optically isolated inputs to 5-24V DC sensors and TTL/CMOS inputs to compatible signal sources.
Maintenance Best Practices: Perform quarterly inspections to clean dust from connectors and front-panel status LEDs using compressed air. Regularly check channel status LEDs to identify overflow conditions or signal issues. Test each counter channel monthly by applying a known input signal and verifying count accuracy. Ensure power supply voltages (5V ±5%, ±12V ±10%) are stable to prevent counting errors. Use only genuine Motorola spare parts to maintain VMEbus compatibility and counting precision.
Service & Warranty Commitment
The **Motorola MVME-340** is backed by a 2-year manufacturer’s warranty covering defects in materials and workmanship under normal industrial operation. Motorola’s technical support team provides professional assistance via email and phone, with response times within 24 hours for critical issues. We offer remote diagnostic services to troubleshoot counting accuracy or configuration problems, minimizing on-site service costs. For legacy systems, we provide repair and calibration services to extend product lifecycle. Our commitment to quality ensures that the **Motorola MVME-340** delivers consistent, precise counter/timer performance, protecting your investment in industrial automation infrastructure.
