Vibro-Meter IRC4 Intelligent Relay Card



Vibro-Meter IRC4 Intelligent Relay Card is a specialized expansion relay module engineered for Meggitt’s VM600 machinery protection system (MPS).

 Installed into a standard 19-inch 6U rack (such as ABE04x or ABE042), the IRC4 expands the system's output switching capabilities, driving complex voting logic, multi-level plant warnings, emergency trips, and automated shutdown routines for critical rotating machinery.

Product Introduction / Overview

System Expansion Hub: Provides dedicated, programmable electromechanical relay contacts to extend the discrete alarm output capacity of VM600 racks beyond standard MPC4/IOC4T local outputs.

Complex Logic Processing: Integrates onboard logic engines capable of processing Boolean logic functions (AND, OR, 2oo3 voting structures) across multiple input channels and processing cards across the backplane.

Fail-Safe Operation: Features software-configurable relay states, including standard normally energized (fail-safe) or normally de-energized operation with configurable latching and reset behaviors.

Dedicated Status Diagnostics: Incorporates active contact state monitoring, continuously validating relay coil integrity and backplane communication paths.

Technical Parameter List

Product Features / Core Advantages

High-Density Output Channeling: Integrates 16 independent relays into a single slot, saving rack space in dense turbine and compressor protection installations.

Advanced Alarm Voting Logic: Performs localized voting algorithms independently of host controller software to ensure high-speed trip response times (typically <20 ms).

Flexible Contact Configuration: Each relay can be individually set via VM600 MPSx configuration software for open-on-alarm, close-on-alarm, latched, or non-latched output behaviors.

Fully Hot-Swappable: Supports live insertion and extraction while the VM600 rack remains powered, allowing system maintenance without interrupting machinery operations.

Model Classification

VM600 IRC4 Standard Edition: Provides 16 independent SPDT relay outputs for general machinery alert and trip voting routines.

IRC4 Hardware Variants (PNR 200-561 series):

Standard Terminal Option: Rear connection via screw-terminal connector blocks.

High-Reliability / Sealed Option: Hermetically sealed relays for hostile gas environments or extreme industrial conditions.

Complementary Modules:

RLC16: Legacy relay module providing raw relay expansion without internal programmable logic.

IOC4T / MPC4: Primary machinery protection card set that feeds raw alarm triggers to the IRC4 over the VM600 Raw Bus.

Environmental Tolerance Conditions

Operating Temperature: -25°C to +65°C (-13°F to +149°F)

Storage Temperature: -40°C to +85°C (-40°F to +185°F)

Relative Humidity: 5% to 95% non-condensing

Vibration Resistance: Compliant with IEC 60068-2-6 standards (10 Hz to 150 Hz at 2g)

Shock Resistance: IEC 60068-2-27 compliant (15g acceleration, 11 ms pulse duration)

EMC Standards: Fully compliant with IEC/EN 61000-6-2 (Industrial Immunity) and IEC/EN 61000-6-4 (Emissions)

Installation Method

Slot Identification: Select an available option slot (slots 1 to 11 depending on rack layout) on the front of the VM600 ABE04x rack.

Backplane Insertion: Align the IRC4 circuit card along the top and bottom guide rails of the rack slot. Push the card in firmly until the multi-pin connector seats completely into the rear backplane.

Mechanical Fastening: Hand-tighten the top and bottom front-panel retaining screws to lock the module into position and complete chassis ground bonding.

Rear Wiring Connection: Attach field trip circuitry cables to the corresponding rear terminal strips, ensuring proper strain relief and insulation.

Operating Instructions

System Software Mapping: Open the VM600 MPSx or VibroSight configuration tool on a connected PC.

Logic Assignment: Define the trip matrix by linking input channels from MPC4 dynamic processing cards to the IRC4 output relays using desired logic conditions (e.g., 2oo3 trip logic).

Trip Test Routine: Execute an offline trip test via software to verify individual relay switching behavior and validate external interlock loops.

LED Diagnostic Review: Observe the front-panel status indicators during startup:

STATUS LED (Green): Solid illumination confirms valid backplane power and healthy CPU execution.

RELAY STATUS LEDs (Yellow): Illuminated when corresponding relays are activated / tripped.

DIAG/FAULT LED (Red): Indicates backplane communication loss or internal relay driver failure.