Foxboro FBM218 P0922VW HART® Communication Redundant Output Interface Module

The FBM218 module offers redundant configurations for eight output channels, each capable of providing a 4 to 20mA analog output signal or a digital HART® signal superimposed on a 4 to 20 mA analog output signal.

Specification：

• Supported Hart Instrument Types : HART instruments compliant to Version 5, 6, or 7 of the HART specifications may be used
• Interface : 8 isolated output channels
• Isolation : The channels are galvanically isolated (both optical and transformer isolation) from each other, and from ground and module logic. The module withstands, without damage, a potential of 600 V ac applied for one minute between the isolated channels and earth (ground).
• Fieldbus Communication : Communicates with its associated FCM or FCP via the redundant 2 Mbps HDLC fieldbus
• Operating temperature : Module -20 to +70°C (-4 to +158°F) Termination Assembly PVC -20 to +50°C (-4 to +122°F)

Key Features：

Key features of the FBM218 module include:

• Eight channel-isolated output channels, each providing one of the following outputs:
  • Standard 4 to 20 mA analog output signal
  • Digital HART Frequency Shift Keying (FSK) signal superimposed on a 4 to 20 mA analog output signal.
• Module pairs offer redundancy at the FBM level.
• FSK modem dedicated to each output channel for bi-directional digital communications with a HART field device.
• Support for HART universal commands necessary to interface the field device with the I/A Series® system database.
• Galvanic isolation of all output channels from each other, ground, and module logic.
• Compact, rugged design suitable for enclosure in Class G3 (harsh) environments.
• Termination Assemblies (TAs) for locally or remotely connecting field wiring to the FBM218.

OVERVIEW:

The HART Communication Redundant Output Interface Module (FBM218) comprises eight channel-isolated output channels, supporting a mix of standard 4 to 20 mA devices and HART devices.

When used in pairs, these modules provide redundancy at the Fieldbus Module (FBM) level, with field outputs connected to a common termination assembly. In this configuration, one FBM218 serves as the Master, and the other as the Tracker.

The FBM218 also functions as a HART communications field device host, facilitating the I/A Series system’s ability to request and receive two digital messages per second from each field device. This enables message pass-through capabilities to support various HART commands, excluding burst communication mode.

The module offers an isolated power supply for each channel.

COMPACT DESIGN:

The FBM218 boasts a compact design with a rugged extruded aluminum exterior for circuit protection. Specifically designed enclosures are available for mounting the FBMs, providing varying levels of environmental protection, up to harsh environments per ISA Standard S71.04.

For more information, please refer to the PDF：FBM218

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