Description

The EPRO SDM010 is a dedicated Sensor Diagnostic Module designed to continuously verify the health and integrity of eddy-current proximity probe systems used in rotating machinery monitoring. As part of EPRO’s MMS6000 and MMS9000 machinery protection platforms, the SDM010 measures both the DC gap voltage (static position) and AC vibration signal from standard -2 to -18 V DC output probes—detecting faults such as cable breaks, short circuits, probe detachment, or gradual insulation degradation before they cause false trips or missed alarms.

Unlike basic monitor cards that only process vibration data, the SDM010 acts as an “early warning sentinel” for the entire sensor loop—ensuring that protection system inputs remain trustworthy under all operating conditions.

Application Scenarios

At a North Sea offshore platform, a main gas compression train suffered an unexpected shutdown due to a spurious high-vibration alarm. Investigation revealed a cracked extension cable shield causing intermittent grounding—undetectable by the standard monitor. After retrofitting EPRO SDM010 modules on all critical shaft probes, the system flagged rising DC offset drift and AC noise on the same cable weeks before failure. Maintenance replaced the cable during a planned window, avoiding a potential $ 8M production loss. In this harsh environment, the SDM010 didn’t just monitor sensors—it preserved operational continuity.

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Note: The SDM010 does not replace vibration monitors like the MMS3120—it complements them by validating sensor health upstream.

Technical Principles and Innovative Values

Innovation Point 1: Dual-Parameter Sensor Validation

The SDM010 simultaneously checks DC bias stability (indicating probe gap or mounting shift) and AC signal integrity (indicating cable shielding or driver issues)—providing a complete picture of sensor health beyond simple open-circuit detection.

Innovation Point 2: Threshold-Based Fault Logic with Hysteresis

Users can set independent alarm bands for DC drift (e.g., >±1 V from baseline) and AC noise floor (e.g., >10% of full scale). Built-in hysteresis prevents chatter during transient events.

Innovation Point 3: Seamless Integration into Existing MMS Architectures

The module mounts in standard EPRO racks alongside MMS3120 or MMS6210 cards, sharing power and backplane—requiring no additional cabinets or wiring for core functionality.

Innovation Point 4: Proactive Maintenance Enablement

By trending DC gap voltage over time, the SDM010 helps identify slow mechanical shifts (e.g., thermal growth anomalies or foundation settling)—turning diagnostics into predictive insights.

Application Cases and Industry Value

In a Middle Eastern LNG plant, repeated false trips on a cryogenic pump were costing $ 500K per incident. Root cause analysis showed moisture ingress in probe connectors causing erratic DC bias. Installation of EPRO SDM010 modules allowed operators to correlate humidity spikes with gap voltage drift—triggering preemptive connector resealing. False trips ceased entirely over the next 18 months.

Similarly, a European hydroelectric facility used the SDM010 to validate sensors on 50-year-old turbine-generator sets. The module confirmed legacy probe reliability during a regulatory audit, deferring a $ 2M sensor replacement project without compromising safety.

Related Product Combination Solutions

EPRO MMS3120: Dual-channel vibration monitor – primary protection logic

EPRO MMS6810: 19″ rack chassis – houses SDM010. monitors, and power supplies

EPRO PR6423/00R-010: 8 mm proximity probe – standard field device compatible with SDM010

EPRO MMS6000 Configuration Software: For baseline setting and alarm configuration

EPRO MMS9000: Next-gen platform with embedded diagnostics (reduces need for separate SDM010)

Bently Nevada 3500/15: Functional equivalent (Transient Data Interface with sensor validation)

EPRO MMS6910: Relay output module – can be triggered by SDM010 fault signals

Vibration Analyst Workstation: For trend analysis of SDM010 diagnostic data

Installation, Maintenance, and Full-Cycle Support

Installing the EPRO SDM010 requires mounting in an MMS-compatible rack and connecting probe cables to its front-panel BNC or screw terminals. During commissioning, a “baseline” DC gap value is recorded for each channel—this becomes the reference for future health checks. No calibration is needed.

Maintenance involves periodic review of fault logs and visual inspection of LEDs. Modules are hot-pluggable in supported racks, enabling replacement without system shutdown.

We supply genuine EPRO SDM010 units with original labeling, full functional testing using calibrated probe simulators (including fault injection), and a 12-month warranty. Every module undergoes 48-hour burn-in and API 670 compatibility verification. Our engineering team offers integration support with legacy Bently systems, migration paths to MMS9000. and custom diagnostic logic development.

Contact us for a customized solution—whether you’re hardening your machinery protection system against nuisance trips, preparing for regulatory audits, or securing spares for your EPRO SDM010-enhanced monitoring architecture. With precision diagnostics and industrial heritage, this module ensures your sensors tell the truth—every second of every day.