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A6312
Product Overview
The Emerson A6312 Speed and Key Monitor is a dual-channel monitoring module designed to measure rotational speed and key-phase signals in industrial rotating machinery. It supports machinery protection applications where accurate speed, phase reference, and zero-speed information are important for equipment operation and maintenance.
The A6312 belongs to the Emerson EPRO machinery monitoring product family. Depending on the model variant, it is used with compatible IMR 6000 or AMS 6500 machinery protection systems.
The module can monitor forward and reverse rotation, detect zero-speed conditions, and process key-phase signals from compatible sensors. These functions support turbine, compressor, and other critical rotating machinery monitoring applications.
When purchasing a replacement module, verify the complete model designation and rack compatibility before placing an order.
Product Information
- Manufacturer: Emerson
- Product Model: A6312
- Product Type: Dual-Channel Speed and Key Monitor
- Monitoring Functions: Speed, key phase, zero speed, and rotation direction
- Compatible System: IMR 6000 series, depending on configuration
- AMS 6500 Variant: A6312-8
- Input Type: Eddy-current sensor signals, differential input
- Mounting: Plug-in Eurocard module
- Application: Industrial machinery protection
Key Features
Dual-Channel Speed Monitoring
The A6312 provides two independent monitoring channels for compatible rotational speed signals. The measurement configuration can be adjusted through the applicable configuration software.
Key-Phase Monitoring
The module processes key-phase reference signals used in rotational machinery monitoring and vibration analysis. Accurate phase reference information helps maintenance teams assess machinery behavior under different operating conditions.
Zero-Speed Detection
The A6312 supports zero-speed monitoring by evaluating incoming sensor pulses. This function can be useful for detecting stopped machinery and monitoring speed-related operating conditions.
Forward and Reverse Rotation Detection
With a compatible trigger wheel and sensor arrangement, the monitor can determine rotational direction. Actual functionality depends on the selected measurement mode and installed configuration.
Industrial Machinery Protection
The module is designed to work as part of a compatible machinery protection system. Its measurements can support alarm logic, equipment monitoring, and maintenance activities.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson |
| Model | |
| Product Type | Dual-Channel Speed and Key Monitor |
| Number of Channels | 2 independent channels |
| Input Type | Eddy-current, differential |
| Compatible Sensor Series | Emerson 6422, 6423, 6424 and 6425 |
| Input Resistance | Greater than 100 kΩ |
| Input Voltage Range | 0 to ±27.3 VDC |
| Input Frequency Range | Up to 20 kHz |
| Minimum Measurement Range | 2 V |
| Maximum Configurable Range | Up to 30 V |
| Sensor Supply Nominal Voltage | -26.75 VDC |
| Sensor Supply Current | 20 mA nominal, 35 mA maximum |
| Buffered Front-Panel Outputs | 2 |
| Buffered Output Signal | ±10 V, with input-level attenuation |
| Configuration Interface | Mini-DIN, RS-232 |
| Module Dimensions | Approximately 160 × 128.4 × 30 mm |
| Module Weight | Approximately 320 g net |
Specifications should be checked against the relevant Emerson manual and exact module variant. Rack width and system compatibility differ between A6312 and A6312-8.
Typical Applications
The Emerson A6312 Speed and Key Monitor may be used in supported monitoring systems for:
- Steam turbines
- Gas turbines
- Hydro turbines
- Industrial compressors
- Rotating machinery speed monitoring
- Key-phase reference monitoring
- Zero-speed detection
- Machinery protection and condition monitoring
The correct sensor, trigger-wheel arrangement, and measurement configuration depend on the machinery installation.
System Compatibility
The original A6312 and A6312-8 should not be assumed to be interchangeable.
According to Emerson’s protection-card documentation:
- A6312 is intended for compatible IMR 6000/10 and IMR 6000/30 systems.
- A6312-8 is the variant specified for AMS 6500 systems.
Before ordering, check the installed rack model, module width, connector arrangement, sensor configuration, and full product designation.
Ordering Information
If you are looking for an Emerson A6312 Speed and Key Monitor, please confirm the following details before purchasing:
- Exact model and part number
- Required quantity
- Product condition: new, unused surplus, or used
- Compatible rack or machinery protection system
- Destination country
- Required delivery date
Contact us to inquire about current stock, pricing, testing status, warranty terms, and shipping arrangements.
Frequently Asked Questions
What does the Emerson A6312 do?
The A6312 monitors rotational speed and key-phase signals. It also supports zero-speed detection and rotation-direction monitoring in compatible configurations.
How many channels does the A6312 have?
The A6312 is a dual-channel monitor with two independent input channels.
Which sensors are compatible with the A6312?
The documentation lists Emerson 6422, 6423, 6424, and 6425 series sensors. Confirm the exact sensor and driver combination against the installation manual.
Is the A6312 compatible with AMS 6500?
The AMS 6500 version is designated A6312-8. The original A6312 is specified for compatible IMR 6000/10 and IMR 6000/30 systems. Confirm the complete model before ordering.
What is the maximum input frequency?
The documented input frequency range extends to 20 kHz. Actual speed capability depends on the trigger-wheel configuration and number of marks.
How can I request a quotation?
Provide the full model number, required quantity, product condition, and delivery destination. Including a photograph of the module label can help verify the correct variant.
Request a Quote for Emerson A6312
Looking for an Emerson A6312 Speed and Key Monitor for your machinery protection system?
Contact us to confirm availability, pricing, product condition, and delivery options. Our team can review the model designation and system requirements before the order is confirmed.
EMERSON BRAND
| A3120/022-000 | A3120/022-000 | WH5-2FF 1X00416H01 |
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| A6110 | A6110 | VE3007 KJ2005X1-BA1 |
| A6120 | A6120 | VE3008 |
| A6125 | A6125 | A6410 9199-00005 |
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