EMERSON & EPRO Sensor

Overview

Brand Name:	Emerson Epro
Model Number:	MMS6410
Country of Origin:	USA
Packaging Details:	Original new Factory Sealed
Delivery Time:	in stock
Payment Terms:	T/T

Contact for quotation

Sales Manager:	Stella
Send an email:	[email protected]
Contact in Whatsapp:	+86 18159889985

Specifications

Parameter	Specification
Model	MMS6410
Manufacturer	epro GmbH
Product Family	MMS 6000 Machine Monitoring System
Number of Channels	2 independent differential inputs
Sensor Type	Inductive displacement sensors (e.g., PR 9350 series), half/full bridge, differential transformers (LVDT/RVDT)
Carrier Frequency	4.75 kHz
Sensor Supply Voltage	4 Vrms (balanced to ground)
Permissible Sensor Load	120…600 Ω
Max. Input Voltage	3.6 V (overvoltage protected)
Nominal Input Voltage Range	2.5 Vrms
Input Impedance	200 kΩ
Measuring Frequency Range	0…100 Hz (–3 dB)
Displacement Measuring Range	Depends on transducer range; outputs can be inverted
Analogue Current Outputs	2 × 0/4…20 mA (configurable, short-circuit proof, 500 Ω max load)
Analogue Voltage Outputs (DC)	2 × 0…+10 V (short-circuit proof, ≥10 kΩ load, 8-bit resolution)
Analogue Voltage Outputs (Dynamic)	2 × 0…12 Vp (short-circuit proof, ≥100 kΩ load, 0 Hz…20 kHz)
Accuracy	±1% of full-scale (all outputs)
Resolution (Current Outputs)	16-bit
Alarm Outputs	4 optocoupler outputs (2 per channel), Umax=48 V DC, Imax=100 mA
Alarm Limit Adjustment Range	5…100% of full-scale
Delay Time	0…5 s (selectable)
Control Inputs	Optocoupler mode, alarm inhibit, run-up multiplier (1.000…4.999), 24 V logic
Keyphasor Input	1 pulse/rev (24 V logic, min. 10 µs pulse duration, edge-triggered)
Communication Interfaces	RS 232 (front panel, local configuration); RS 485 (up to 31 modules / 62 channels per bus)
Power Supply	18…31.2 V DC (redundant inputs, diode-decoupled)
Power Consumption	Max. 8 W (max. 300 mA at 24 V)
Operating Temperature	0 to +65°C
Storage/Transport Temperature	–30 to +85°C
Relative Humidity	5 to 95% (non-condensing)
Vibration Resistance	0.15 mm amplitude (10–55 Hz); 16.6 m/s² (55–150 Hz)
Shock Resistance	98 m/s² peak, 16 ms duration
Protection Class	IP00 (module) / IP21 (front panel)
Order Number	9100-00005
Accessories	MMS 6910 (operating manual, configuration software, connection cables)
Dimensions	3x19x12.7cm
Weight	0.3kg

Description

The MMS6410 is a dual-channel measuring amplifier from epro‘s MMS 6000 series, purpose-built for absolute expansion and displacement measurements using inductive sensors such as the PR 9350 series. The MMS6410 accepts half-bridge, full-bridge, and LVDT/RVDT transducers, providing both static and dynamic signal outputs up to 100 Hz. The MMS6410 supports sum and difference calculations from both channels, enabling differential expansion monitoring. With redundant 18…31.2 V DC inputs, RS 232/RS 485 communication interfaces, and hot-swappable design, the MMS6410 delivers reliable performance for turbine protection and machinery diagnostics in demanding industrial environments.

Applications

Turbine Expansion Monitoring – Measures absolute casing and shaft expansion on steam, gas, and hydro turbines for thermal growth protection
Differential Expansion – Calculates difference between rotor and casing expansion to prevent rubs and axial contact
Valve Position Measurement – Monitors control valve and servo valve stroke positions in turbine governing systems
Force and Torque Measurement – Measures physical quantities via inductive transducers configured for force or torque sensing
Angular Displacement Monitoring – Tracks angular position or rotation using suitable LVDT/RVDT sensors
Pump and Compressor Protection – Monitors axial thrust position on centrifugal compressors and pumps to prevent bearing damage
Generator Air Gap Monitoring – Measures stator-rotor expansion or displacement in large generators
Sum and Difference Calculations – Combines two independent channels to derive derived values for complex machinery diagnostic functions

Features

Dual Independent Channels – Each channel operates separately, or channels can be combined to calculate sum or difference values
Multi-Sensor Compatibility – Accepts half-bridge, full-bridge, and differential transformer (LVDT/RVDT) inductive sensors
Static and Dynamic Signal Outputs – Provides both DC (0…10 V) and dynamic (0…12 Vp) outputs, enabling both steady-state and transient analysis
Configurable Alarm Limits – Four independently adjustable alarm outputs (2 per channel) with configurable hysteresis and delay (0…5 s)
Run-Up Multiplier – External binary input allows alarm limits to be multiplied (1.000…4.999) during machine startup to avoid nuisance trips
Hot-Swappable Design – Module can be replaced during operation without system shutdown, minimizing downtime
Redundant Power Inputs – Two diode-decoupled 18…31.2 V DC inputs ensure uninterrupted operation
RS 232 and RS 485 Interfaces – Local configuration via front-panel RS 232; RS 485 bus supports up to 31 modules (62 channels) for integration with MMS 6800 or host computers
Comprehensive Self-Diagnostics – Continuously monitors sensor wiring, supply voltages, configuration integrity, and watchdog timer
Galvanically Isolated Outputs – Current and alarm outputs are galvanically isolated from system supply for noise immunity
Sensor Supply Balanced to Ground – Reduces noise susceptibility in industrial environments

Competitive Advantage

True Differential Expansion Measurement – Unlike single-channel amplifiers, the MMS6410 directly calculates sum and difference values between two channels, providing genuine differential expansion monitoring essential for turbine rub prevention.
Multi-Sensor Versatility – Supports half-bridge, full-bridge, and LVDT/RVDT sensors in a single module, reducing spare parts inventory and simplifying upgrades from legacy systems.
High-Frequency Dynamic Signal Output – Provides a raw sensor output up to 20 kHz (with carrier frequency) alongside the filtered 100 Hz DC output, enabling simultaneous condition monitoring and diagnostic analysis.
Carrier Frequency Technology – Uses a 4.75 kHz carrier frequency with balanced-to-ground sensor supply, offering superior noise immunity in electrically noisy industrial environments compared to DC-excited systems.
Run-Up Alarm Multiplier – The external binary input allows dynamic scaling of alarm thresholds during startup, eliminating nuisance trips while maintaining full protection at operating speed.
Seamless MMS 6000 Integration – Fully compatible with epro‘s MMS 6800 analysis and diagnostic system and RS 485 bus architectures, enabling scalable machine monitoring systems from single machines to entire plants.
Hot-Swappable with Redundant Power – Hot-swappable design with diode-decoupled power inputs ensures continuous operation during module replacement and power supply maintenance.

FAQ

Q1: What types of sensors are compatible with the MMS6410?

A1: The MMS6410 accepts inductive displacement sensors in half-bridge and full-bridge configurations, including differential transformers (LVDT/RVDT). epro‘s PR 9350 series sensors are fully compatible, as are other sensors with matching electrical characteristics.

Q2: Can the MMS6410 measure both static and dynamic signals simultaneously?

A2: Yes. The MMS6410 provides separate outputs for static (0…10 V) and dynamic (0…12 Vp) signals. The static output is filtered to 100 Hz for steady-state monitoring, while the dynamic output provides the raw carrier-frequency signal (up to 20 kHz) for vibration and transient analysis.

Q3: Can the two channels be combined for differential expansion measurements?

A3: Yes. The MMS6410 can calculate sum or difference values from both channels. This is essential for differential expansion monitoring, where the difference between rotor and casing expansion is critical for turbine protection.

Q4: What is the purpose of the run-up multiplier input?

A4: The run-up multiplier input allows the alarm limits to be multiplied by a configurable factor (1.000…4.999) during machine startup. This prevents nuisance trips caused by transient thermal expansion during run-up and run-down while maintaining full protection at normal operating speed.

Q5: Does the MMS6410 provide sensor fault detection?

A5: Yes. The MMS6410 continuously monitors sensor wiring for open circuits and short circuits, along with supply voltage integrity and configuration validity. A green “Channel Clear” LED indicates normal operation; it switches off during a fault, and detailed fault reasons can be read via the RS 232 or RS 485 interfaces for rapid troubleshooting.

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