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Emerson A6630 Temperature Monitor Machine Monitoring System

From:Emerson | author:Mr.Chen | Time :2024-07-16 | 113 view: | Share:

The A6630 temperature monitor is designed to provide extreme reliability for the most critical rotating machinery in your plant.

This 1-slot, multi-channel monitor can be used with other AMS 6500 monitors to form a complete API 670 machinery protection monitor.

Applications include steam, gas, compressors and water turbines.

The primary function of the temperature monitor is to input RTD and thermocouple temperature sensors, to

The main function of the temperature monitor is to input RTD and thermocouple temperature sensors and reliably protect machinery by comparing temperature levels with alarm set points and actuating alarms and relays.

Temperature monitoring as well as vibration and position measurements provide better fault confirmation, thus increasing availability and safety.

Machinery protection applications include radial and thrust bearing metal temperatures.

Important process temperature values include generator, rotor and stator winding temperatures, oil supply temperatures, steam temperatures, and ambient temperatures.

The AMS 6500 is an integral part of the PlantWeb® digital plant architecture and AMS software.

PlantWeb provides operators with a comprehensive view of machine health in conjunction with the Ovation® and DeltaV™ process control systems.

AMS software provides maintenance personnel with advanced predictive and performance diagnostic tools, enabling them to determine machine failures early with confidence and accuracy.

Components of the AMS 6500 Machine Monitoring System

Suitable for thermocouple and RTD (resistance temperature detector) temperature sensors

No additional sensor transmitters required

Access to a single card via front-end RS232 port for configuration and

visualisation of monitoring information

Reading of all measurement data via serial interface

Extended self-test functions for electronic circuits and sensors

Hot-swappable, replaceable monitors during operation

Measurements according to API 670

Sensor inputs

The following sensor types are supported

Thermocouples:

Type E -270.... .1000°C

Type J -210.... .1200°C

Type K -270... .1372°C .1372°C

Model T -270... .400°C .400°C

Signal voltage range: ±500mV

RTD:

PT100 (α=0.00385) -200.... .850°C

PT100 (α=0.00392)-200...660°C .660°C

Ni100 (α=0.00549)-60... .180°C .180°C

Ni120 (α=0.00672) -80...260°C .260°C

Cu10 (α=0.00427)-200...260°C .260°C

Measurable resistor range: 0..... .1000kΩ

These inputs are electrically isolated from the rest of the monitoring circuit.

Sensor power supply

Each channel is equipped with an integrated sensor power supply.

Thermocouples:

Bias voltage for isolating thermocouples

RTD: Constant current supply: 250μA .... . 1mA

Voltage: 4V

Power supply

Redundant power supply via two power inputs (decoupling diodes). At least one power input is required for module power supply.

Supply voltage: 24 (18.... .31.2) VDC according to IEC 654-2; class DC4

Power consumption: max. 8 W

Control inputs

All channels have two logic binary inputs for the following two functions:

Reset of the maximum measured temperature

Reset latching relay

Limit blocking

The control inputs are designed for 24V logic (active low input)

Low level: 0.... .3V; high level: 13.... .48V

Input resistance: ≥30 kΩ

Current output

Nominal range:

0/4... .20 mA or 20... .4/0 mA

Open and short circuit protection

Permissible load ≤ 500 Ω

Resolution 16 bit

Optocoupler outputs

Six collector/emitter outputs

Uce = 48 VDC

Ice = 100 mA

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