MOTOROLA MVME333-2

Description

Detailed Parameter Table

MOTOROLA MVME333-2

Product Introduction

The Motorola MVME333-2 is a dual-function VMEbus specialized interface module, engineered to combine RS-485/RS-422 long-distance communication with discrete digital I/O—filling the gap between single-purpose communication modules (e.g., MVME712/M) and pure digital I/O modules (e.g., MVME162-212). As a 3U VME form factor device, it is designed for industrial systems that require both remote device connectivity (via RS-485) and local discrete control (via digital I/O), eliminating the need for two separate modules and saving VME chassis slots.

A defining strength of the MVME333-2 is its seamless integration with the Motorola VME ecosystem. When paired with a host SBC like the MVME5500, it leverages the VMEbus to receive configuration commands (e.g., serial baud rate, digital I/O direction) and transmit data—such as remote sensor readings from RS-485-connected devices or local I/O states from discrete sensors. It draws stable power from modules like the FAB 0340-1049 (via VME backplane) or 01-W3324F (for auxiliary power), while its 0°C–60°C temperature range ensures reliability in standard industrial environments—from factory control rooms to indoor monitoring stations.

Whether deployed in distributed sensor networks、remote equipment control, or hybrid I/O-communication setups, the MVME333-2 enables streamlined system design. Its RS-485 port supports multi-drop connectivity (up to 32 nodes per port), making it ideal for large-scale sensor deployments, while the 16x digital I/O channels handle local control tasks (e.g., activating alarms, monitoring safety interlocks). These features make it a cost-effective, space-saving solution for legacy VME systems requiring mixed communication and I/O capabilities.

Core Advantages and Technical Highlights

Dual-Function Integration for Space Efficiency

The MVME333-2’s combination of 2x RS-485/RS-422 ports and 16x digital I/O channels eliminates the need for separate communication and I/O modules, reducing VME chassis slot usage by 50%. For example, in a warehouse inventory tracking system, the module can: 1) use 1x RS-485 port to connect 20 remote RFID readers (scanning pallet tags), 2) use the other RS-485 port to link to a central SCADA system via the FLN4234A, and 3) use 8x digital input channels to monitor warehouse door status, 8x digital output channels to activate location indicator lights. This integrated design simplifies wiring and lowers overall system cost compared to using a dedicated RS-485 module plus a digital I/O module.

Long-Distance RS-485 Connectivity for Distributed Systems

The MVME333-2’s RS-485 ports support transmission distances up to 1200 m and multi-drop configurations (32 nodes per port)—critical for distributed industrial systems. In a water treatment plant with 5 remote pump stations (each 800 m apart), the module can connect to pressure sensors at each station via a single RS-485 bus, transmitting real-time pressure data to the MVME5500 SBC. The differential signaling of RS-485 minimizes noise interference from nearby power cables, ensuring stable data transmission even in harsh electrical environments. This eliminates the need for expensive fiber-optic cables or wireless transceivers, reducing deployment costs by 30–40%.

Robust Protection for Industrial Reliability

The MVME333-2 includes multiple protection features to withstand industrial stressors: 1) serial port surge protection (1 kV ESD) safeguards against electrostatic discharge during maintenance, 2) digital I/O overcurrent protection (30 mA per channel) prevents damage if an output channel is shorted to ground, and 3) EMC immunity (per IEC 61000-6-2) ensures stable operation near high-noise equipment (e.g., variable-frequency drives). For instance, in a steel rolling mill, the module’s surge protection prevents RS-485 port damage from welding-induced voltage spikes, while overcurrent protection shields the digital I/O channels if a conveyor motor control wire is accidentally shorted—minimizing unplanned downtime.

Flexible Serial Configuration for Legacy Compatibility

The MVME333-2’s serial ports support software-configurable baud rates (300 bps–115.2 kbps), data bits, parity, and stop bits—enabling compatibility with legacy industrial devices that use non-standard serial settings. For example, in a manufacturing plant with older PLCs (programmed for 9600 bps, 7 data bits, even parity), the module can be configured to match these settings via the MVME172-263/260 SBC, avoiding the need to reconfigure or replace the legacy PLCs. The EEPROM storage of configuration parameters also ensures settings are retained during power cycles, eliminating the need for reconfiguration after downtime.

Typical Application Scenarios

Distributed Sensor Networks in Agriculture

In a large-scale greenhouse climate control system, the MVME333-2 (paired with MVME5500 SBC) manages distributed sensors and local control: 1x RS-485 port connects 30 remote temperature/humidity sensors (placed 50 m apart across the greenhouse), transmitting data to the SBC for climate adjustment; the other RS-485 port links to a MVME712/M for remote monitoring via a farm management app; 8x digital input channels monitor soil moisture sensor status, 8x digital output channels activate irrigation valves and heater relays. The module’s RS-485 long-distance capability eliminates wiring complexity, while digital I/O handles real-time local control—ensuring optimal growing conditions.

Remote Equipment Monitoring in Mining

In an underground mining facility, the MVME333-2 is installed in a control cabinet near the mine entrance (paired with MVME2434 SBC): 1x RS-485 port connects to 15 remote gas detectors (placed 300 m apart in mining tunnels), transmitting methane level data to the SBC; the other RS-485 port links to a surface SCADA system via FLN4234A; 8x digital input channels monitor tunnel door interlocks, 8x digital output channels activate alarm sirens and ventilation fans. The module’s surge protection withstands electrical interference from mining equipment, while its 0°C–60°C range adapts to the tunnel’s temperature fluctuations—critical for ensuring miner safety.

Hybrid I/O-Communication in Retail Logistics

In a retail distribution center, the MVME333-2 (paired with MVME172-263/260 SBC) coordinates inventory and conveyor control: 1x RS-485 port connects 25 barcode scanners (tracking packages on conveyors), transmitting scan data to the SBC; the other RS-485 port links to a warehouse management system (WMS) via FLN4234A; 8x digital input channels monitor conveyor jam sensors, 8x digital output channels control conveyor start/stop and package diverters. The module’s integrated design saves VME slot space, while its serial configuration flexibility ensures compatibility with both new and legacy barcode scanners—streamlining logistics operations.

MOTOROLA MVME333-2

Related Model Recommendations

Motorola MVME5500: VME SBC. Host controller for MVME333-2; configures serial ports and digital I/O, processes data from RS-485 devices, and executes control logic—critical for leveraging the module’s dual functionality.

Motorola FAB 0340-1049: Power supply module. Primary power source for MVME333-2; delivers stable +5 VDC (1.2 A max) and +12 VDC to support the module’s serial and digital I/O circuits.

Motorola FLN4234A: Communication expansion module. Complements MVME333-2 in large systems; the FLN4234A’s 4x Ethernet ports extend the MVME333-2’s RS-485 data to remote SCADA systems or cloud platforms.

Motorola 01-W3324F: Power distribution terminal block. Supplies auxiliary power to MVME333-2 (if VME backplane power is insufficient) and distributes 24V DC to connected digital I/O devices (e.g., sensors, alarms).

Motorola MVME162-223: Digital I/O module. Expands the MVME333-2’s I/O capacity; adds 64x digital channels for systems needing more discrete control (e.g., large-scale conveyor networks).

Phoenix Contact RS-485 Repeater: Signal booster. Extends the MVME333-2’s RS-485 transmission distance beyond 1200 m (e.g., in large mining or agricultural systems) and increases node count to 64.

Motorola MVME712/M: Compact communication module. Alternative for small systems; pairs with MVME333-2 to add Ethernet connectivity, enabling RS-485 data transmission to local HMIs.

Installation, Commissioning and Maintenance Instructions

Installation Preparation

Before installing MVME333-2, power off the VME chassis and disconnect the FAB 0340-1049 power supply to prevent electrical shock. Verify the chassis has an available 3U VME slot and that the VME backplane supports 16-bit slave modules. Use an anti-static wristband and mat to protect the module’s serial and digital I/O components from ESD damage. Gather tools: Phillips-head screwdriver (for chassis mounting), twisted-pair cables (for RS-485 connections, 22–18 AWG), 22–18 AWG wires (for digital I/O), torque wrench (to tighten terminal screws to 0.5–0.8 N·m), and a multimeter (to test signal levels). Avoid installing near high-voltage equipment (e.g., transformers) or heat sources (e.g., power resistors) to prevent EMI or thermal damage.

Commissioning and Maintenance

For commissioning, insert the MVME333-2 into the VME slot and secure it. Wire RS-485 devices to the serial ports (A/B lines, ground), ensuring correct polarity (A to A, B to B) to avoid communication failures. Connect digital input devices (e.g., sensors) and output devices (e.g., alarms) to the I/O terminals, matching TTL/CMOS voltage levels. Power on the FAB 0340-1049 and 01-W3324F (if used), then check the module’s LEDs: green “POWER” confirms voltage; serial “TX/RX” LEDs (blinking) indicate data transmission; digital I/O “INPUT HIGH” (green) and “OUTPUT ACTIVE” (red) LEDs confirm state. Use the MVME5500’s configuration software to set serial parameters (baud rate, parity) and digital I/O direction (input/output). Test RS-485 communication by sending test data to a remote device and verifying receipt; test digital I/O by toggling outputs and checking input state changes.

For maintenance: Inspect RS-485 and digital I/O wiring monthly—tighten loose terminals and replace damaged cables to prevent intermittent connections. Clean the module quarterly with compressed air (low pressure) to remove dust from the VME connector and LED indicators (avoids overheating). Test serial port surge protection semi-annually using an ESD simulator (ensure 1 kV protection is active). If a serial port fails, reconfigure the spare port via the SBC; if a digital I/O channel malfunctions, isolate the issue by testing with a known-good device (e.g., a bench power supply for inputs). When upgrading, replicate the module’s serial and I/O configuration to avoid disrupting connected devices.

Service and Guarantee Commitment

Though Motorola MVME333-2 is obsolete, we offer a 90-day warranty on all refurbished units—covering defects in serial port functionality, digital I/O performance, surge protection, and LED indicators. Each refurbished module undergoes rigorous testing: 24-hour RS-485 data transfer testing (verifying 115.2 kbps speed and zero packet loss over 1200 m), digital I/O cycling (toggling all 16 channels to confirm overcurrent protection), and ESD surge testing (ensuring 1 kV protection). This guarantees the module meets the original industrial-grade interface standards.

Our technical support team (24/7 availability) provides guidance on MVME333-2 installation、RS-485 network design, and integration with VME SBCs like the MVME5500 or MVME2434. We offer customized maintenance plans: quarterly remote RS-485 network health checks (via FLN4234A) and semi-annual on-site inspections (testing wiring, verifying surge protection). Our spare parts inventory includes critical components (e.g., RS-485 transceivers, digital I/O drivers) for fast repairs—minimizing downtime in distributed systems.

For users modernizing to Ethernet-based systems, we provide free consultation to select Emerson’s RSTi-EP RS-485/Ethernet gateways—enabling the MVME333-2’s RS-485 data to integrate with modern Ethernet networks while retaining existing devices. We also offer trade-in credits for old units, reducing the cost of upgrading to modules with Gigabit Ethernet and enhanced cybersecurity. Our commitment to legacy support ensures your VME system’s interface backbone remains reliable, whether you maintain existing infrastructure or transition to new platforms.