Foxboro Compact Fbm240 Output And Input Module - China

The Compact FBM240 is an 8 channel input and 8 channel output Foxboro™ DCS Fieldbus Module (FBM) available as a single or redundant module.

A redundant pair of the modules combine to provide redundancy at the FBM level, with field I/O wired to one common termination assembly (see Figure 1).

Each module independently holds the output(s) at its specified output value(s), and each independently reads back its observed value of the output.

This module is part of the Compact 200 Series I/O subsystem described in Compact 200 Series I/O Subsystem Overview (PSS 41H-2COV).

Features • Eight discrete outputs/Eight discrete voltage monitor inputs • Eight discrete inputs read back the voltage across the relay contacts.

Sets the channel BAD if the state of the contact disagrees with the state of the corresponding output channel • Monitors each FBM output and sets the output channel BAD if the output is in the wrong state • Single or redundant module • Termination Assemblies (TAs) for locally or remotely connecting field wiring to the Compact FBM240 • Supports discrete relay outputs capable of switching: ◦ 10 A at 80 to 120 V ac, or ◦ 5 A at 80 to 125 V dc, or ◦ 5 A at 15 to 30 V dc, or ◦ 5 A at 80 to 120 V ac • Supports channel-isolated discrete I/O: ◦ 15-60 V dc @ 2 A, fused outputs ◦ 15-60 V dc inputs NOTE: Support for this termination assembly and the new Fail-Safe configuration options described in Fail-Safe, page 6 require version 1.40N or later firmware.

• Redundant operation failure detection ◦ Output contact monitor readback and high coverage of internal FBM detected failures allows redundant partner to automatically continue to drive discrete outputs and to monitor inputs • Internal per channel output demand state failure detection ◦ Output Channel is marked BAD in both Single and Redundant Operation if the demand state read-back indicates a state of miss-compar

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