GE 8621-FT-IS Intrinsically Safe Field terminal, standard

INPUTS

Number of channels

• 8, single-ended

Nominal signal range (span)

• 1 to 5 V

Full signal range

• 0.19 to 5.64 V

Out of range alarm

• Lower threshold – < 0.19 V

• Upper threshold – > 5.64 V

Accuracy (over temp range)

• ± 0.1% of span

Resolution

• 16 bits

Repeatability

• 0.05% of span

Isolation

• Any channel to Railbus – 100 V ac

• Between channels – None

CONFIGURABLE PARAMETERS

Alarms

• High, high-high, low and low-low

Alarm deadband (hysteresis)

• User defined value

Input filter time constant

• User defined value

Input dead zone

• User defined value

Drive on failsafe

• Disabled / upscale / downscale

Channel status

• Active / Inactive

The Control System

Each downloaded application is a complete distributed application running on the target controller. 

Multiple applications, running on separate controllers, can be linked together using the peer-topeer tool, 

which identifies tagnames for use across the network. 

This data exchange mechanism provides a very efficient way of sharing information between multiple controllers. 

• 16 single-ended input channels

• Intrinsically safe field circuits

• Simple apparatus, dry contacts

or IS proximity detectors

• Open and short-circuit

field wiring detection

Project backup and restore 

You can create a backup file of your project at any time. 

This useful feature enables you to save your application in a known state, and if necessary, restore the project to that state. 

You can import and export resources from one project to another, enabling you to re-use prior work. 

If the results of importing or exporting resources are unsatisfactory, you can choose to restore the project.

Downloader The Workbench 

Downloader is used to download the firmware and control strategy to the controller. 

With Redundant Controllers, strategy changes can be downloaded to a backup controller without disrupting control in the primary controller. 

When the download is complete, the backup controller will take over control and update the primary controller with the changes. 

Control can revert back to the primary controller after these changes are incorporated. 

Downloading to a simplex controller can be done on-line and without initializing data, the new strategy starting on the next execution cycle.