Overview

The Meggitt (Vibro-Meter) 204-900-000-011-A1-B21-C1-H10-I0 is a complete proximity measuring system. This system includes an eddy-current sensor and an IQS900 signal conditioner. It measures shaft relative vibration and position. The system supports both current and voltage output signals.

This Vibro-Meter model has a standard environment rating. The design follows API 670 recommendations. It works perfectly with VM600Mk2, VM600, and VibroSmart® monitoring systems.

Technical Specifications

The 204-900-000-011-A1-B21-C1-H10-I0 system consists of a sensor and an IQS900 conditioner. The sensor uses the eddy-current principle for non-contact measurement. The system provides diagnostic capabilities to detect measurement chain problems.

System Configuration Breakdown

The part number 204-900-000-011-A1-B21-C1-H10-I0 defines the complete system:

• Environment (A1): Standard (non-Ex)

• Sensitivity (B21): 8 mV/µm, 2 mm range

• Diagnostics (C1): Without diagnostics

• Total System Length (H10): 10 m

• Installation (I0): Without DIN-rail adaptor

IQS900 Signal Conditioner Output Specifications

Current Output (2-wire transmission)

• Current at min. gap: −15.5 mA

• Current at max. gap: −20.5 mA

• Measurement range: 5 mA (2 or 4 mm)

• Output impedance: >60 kΩ

Voltage Output (3-wire transmission)

• Voltage at min. gap: −1.6 V

• Voltage at max. gap: −17.6 V

• Measurement range: 16 V (2 or 4 mm)

• Output impedance (DC): <100 Ω

• Output impedance (20 kHz): <300 Ω

Raw Output Specifications

• Output voltage range: −0.8 to −8.8 V (nominal)

• Output impedance (DC): <10 kΩ

• Output impedance (20 kHz): <15 kΩ

Power Supply Requirements

• Input voltage (current output): −18 to −30 VDC

• Input voltage (voltage output): −19 to −30 VDC

• Current consumption: 25 mA max at 24 VDC

• Overvoltage protection: −33 VDC typical

Key Features

This Vibro-Meter system offers flexible output options. Users can choose 2-wire current output or 3-wire voltage output. The 8 mV/µm sensitivity provides accurate gap measurement. The 2 mm measurement range suits most vibration monitoring applications.

The IQS900 signal conditioner includes diagnostic features. Current values outside −15.5 to −20.5 mA indicate problems. Voltage values outside −1.6 to −17.6 V also signal issues. This helps users identify sensor or cable faults quickly.

The low output impedance enables use with galvanic isolators. A 100 Ω output driving a 10 kΩ input loses only 1% signal. Short-circuit protection (35 mA) and overvoltage protection (−33 VDC) ensure reliability.

Environmental and Mechanical Specifications

IQS900 Environmental Ratings

• Operating and storage temperature: −40°C to 85°C

• Humidity: 0 to 95%, non-condensing

• Protection rating: IP20 (indoor use only)

• Flammability rating: UL94 V-0

• Vibration: 5 g peak (10 to 500 Hz)

• Shock: 15 g peak (11 ms half sine-wave)

Connector Specifications

• Sensor connector: Self-locking miniature coaxial

• Test connector: 4 contacts (RAW/COM, TEST/COM)

• Output connector: 4 contacts (O/P/COM, −24V/COM)

• Wire size: 0.2 to 1.5 mm² (24 to 16 AWG)

• Tightening torque: 0.2 to 0.25 Nm

Installation Guidelines

Mount the IQS900 signal conditioner using two M4 screws. The optional MA130 DIN-rail adaptor (order code G2) is also available. Hand-tighten all self-locking coaxial connectors until locked.

Use a limited-power, low-voltage power supply for safety. The recommended monitoring system input impedance is ≤350 Ω for current output. For voltage output, use ≥50 kΩ input impedance.

Install the IQS900 in an industrial enclosure for environmental protection. The IP20 rating is suitable for indoor use only. Keep the sensor cable away from high-voltage wiring.

Package Contents

• 204-900-000-011-A1-B21-C1-H10-I0 Proximity Sensor (1 unit)

• IQS900 Signal Conditioner (1 unit)

• 10 meter total system cable length

• Self-locking miniature coaxial connectors

• Screw-terminal connectors for test and output signals

• Installation instruction manual

Frequently Asked Questions (FAQ)

1. What is the sensitivity of the Meggitt 204-900-000-011 system?
The 204-900-000-011-A1-B21-C1-H10-I0 has 8 mV/µm sensitivity. The B21 code specifies this sensitivity with a 2 mm measurement range.

2. Can this Vibro-Meter system detect sensor cable faults?
Yes. With diagnostic versions, current outside −15.5 to −20.5 mA indicates problems. Voltage outside −1.6 to −17.6 V also signals measurement chain issues.

3. What power supply should I use with the IQS900 conditioner?
Use a limited-power, low-voltage supply with safe limitation of −30 VDC. For safety-related applications, this applies even with a single fault.

4. What is the difference between current and voltage output?
Current output uses 2-wire transmission with −15.5 to −20.5 mA signals. Voltage output uses 3-wire transmission with −1.6 to −17.6 V signals. The 204-900-000-011 supports both.

5. Does the IQS900 require a DIN-rail adaptor for mounting?
No. The I0 code means this unit ships without the DIN-rail adaptor. Mount it directly with two M4 screws. Order the MA130 adaptor separately if needed.