Section 1 - System Description
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1.2.2 About the 1701/05 Terminal Base (TB) and the 1701/06 Isolator
Terminal Base (ITB)
The 1701/05 Terminal Base is suitable for all applications
where transducers are installed in non-hazardous, Division
2, or Zone 2 areas. The 1701/05 Terminal Base can also be
used with external safety barriers.
The 1701/06 Isolator Terminal Base (ITB) is required for
applications where intrinsically safe transducers are
installed in Division 1 or Zone 0/1 hazardous areas. The
1701/06 ensures intrinsic safety by using a galvanically
isolated safety barrier (isolator) that is installed directly into
the ITB.
The terminal base provides:
• the mounting platform for the system
• slots for up to four monitors allowing up to 8 channels of
monitoring
• slots for up to four internal or external transducer I/O
modules (one required for each monitor)
• slots for up to four isolators (1701/06 ITB only, (one
required for each transducer I/O module)
• an FMIM slot
• a Keyphasor slot (one Keyphasor module per terminal
base, channel A only)
• the power supply slot
• I/O terminations
• the Flexbus connection
• 9 coaxial connectors for buffered dynamic signals from
the 8 monitor channels and the Keyphasor output
• a dynamic connector to connect the 8 buffered dynamic
signals to a “patch panel” for easy diagnostic access.
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