Model: IQS452 204-452-000-221
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Technical Dossier
The IQS452 series succeeded earlier Vibro-Meter signal conditioning platforms including the IQS421 and IQS431 families. The architectural transition introduced modular channel configuration, allowing a single card format to address single-channel, dual-channel, and multi-range measurement requirements through variant suffix coding rather than separate hardware platforms. Early IQS452 variants (suffix -0x1) were optimized for velocity transducer inputs with fixed gain stages. Subsequent revisions introduced programmable gain amplification and extended frequency response to accommodate high-frequency accelerometer inputs required for bearing fault detection (suffix -2xx and -3xx variants). Integration with the VM600 rack's internal communication bus (VME-based backplane) remained consistent across all hardware revisions, ensuring backward compatibility within existing rack installations. As of 2024, the IQS452 series is classified as a mature/end-of-active-production product line. Meggitt has transitioned new installations toward the VM600 MPC4 integrated platform; however, the IQS452 remains the dominant installed module type in legacy VM600 racks globally. No direct plug-compatible replacement exists for the IQS452 form factor, making OEM-equivalent and refurbished spare parts the primary maintenance pathway for operators committed to existing rack infrastructure.
The following SKUs represent the documented IQS452 variant range, classified by channel configuration and input type. Each variant is defined by its 15-digit order code suffix.
IQS452 204-452-000-011: Single-channel velocity input, fixed gain, 4–20 mA output, standard range.
IQS452 204-452-000-021: Single-channel velocity input, extended range, dual output (mA + voltage).
IQS452 204-452-000-031: Single-channel accelerometer input, IEPE/ICP® compatible, programmable gain.
IQS452 204-452-000-041: Single-channel accelerometer input, charge mode (non-IEPE), high-temperature transducer compatible.
IQS452 204-452-000-051: Single-channel displacement proxy input, eddy-current transducer interface, 0–10 V output.
IQS452 204-452-000-111: Dual-channel velocity input, independent gain per channel, 4–20 mA outputs.
IQS452 204-452-000-121: Dual-channel velocity input, extended frequency response (2–1000 Hz), dual mA output.
IQS452 204-452-000-131: Dual-channel IEPE accelerometer input, programmable bandpass filter, dual voltage output.
IQS452 204-452-000-141: Dual-channel charge-mode accelerometer input, isolated signal paths, dual mA output.
IQS452 204-452-000-201: Single-channel, high-sensitivity velocity input, low-noise amplifier stage, SIL-2 rated output.
IQS452 204-452-000-211: Single-channel IEPE input, integrated RMS computation, 4–20 mA RMS output.
IQS452 204-452-000-221: Single-channel signal amplifier, dual-range velocity/acceleration input, programmable output scaling, VM600 backplane bus interface.
IQS452 204-452-000-231: Single-channel, wide-band accelerometer input, 1 Hz–10 kHz bandwidth, voltage output.
IQS452 204-452-000-241: Single-channel, tachometer/speed input conditioning, pulse-to-analog conversion, 4–20 mA output.
IQS452 204-452-000-301: Dual-channel, mixed input (velocity + displacement), independent signal paths, dual 4–20 mA output.
IQS452 204-452-000-311: Dual-channel, mixed input (IEPE + charge mode), selectable gain, dual voltage output.
IQS452 204-452-000-321: Dual-channel, high-isolation input stage, suitable for hazardous area transducer loops (ATEX-compatible wiring).
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