Selection boundary
Four isolated pairs separate field potentials.
GE Fanuc 4 isolated pairs
GE Fanuc IC660BBS101 Genius Isolated I/O Block without Failed-Switch Diagnostic
Eight isolated 115 VAC/125 VDC I/O circuits for applications with parallel field switching.
01Model Profile
IC660BBS101 uses the same four-pair isolated I/O organization as the Genius isolated block family but omits the Failed Switch diagnostic. This distinction supports circuits where a manual switch or another field device is intentionally wired in parallel with an output.
Each of the eight points can be configured as input or output. Tristate inputs can detect open wiring, while outputs retain electronic short-circuit, overload, no-load and overtemperature protection.
IC660BBS103 is documented as the replacement for IC660BBS101. Both retain the no-failed-switch behavior, but terminal and electronics assembly revisions must still be matched during replacement.
Circuits8 configurable isolated I/O
Grouping4 isolated pairs
Field supply115 VAC or 125 VDC
Failed-switch diagnosticNot provided
02Technical Data
Circuits8 configurable isolated I/O
Grouping4 isolated pairs
Field supply115 VAC or 125 VDC
Failed-switch diagnosticNot provided
Output current2 A per point
Block current15 A maximum
Continuous group isolation250 VAC/VDC
Block isolation1500 V
Dimensions224.4 × 88.9 × 100.0 mm
Documented successorIC660BBS103
03Parallel-Wiring Variant
- Command-to-switch mismatch is intentionally ignored.
- Manual or external parallel switching does not create Failed Switch reports.
- Other output protection and input diagnostics remain available.
04Isolation and Control Power
Configuration point
Block control power may be AC or DC independently of the circuit supply.
Installation check
Loss of I/O power can be detected for a pair of circuits.
05Replacement
Documented relationship
IC660BBS103 replaces IC660BBS101.
06FAQ
How does IC660BBS101 implement its Parallel-Wiring Variant function?
Command-to-switch mismatch is intentionally ignored.
Why must Isolation and Control Power be reviewed for IC660BBS101?
Four isolated pairs separate field potentials.
Which No-failed-switch isolated I/O arrangement applies to IC660BBS101?
Four isolated pairs retain protection while omitting Failed Switch comparison.
Which Circuits and Grouping values define the No-failed-switch isolated I/O configuration IC660BBS101?
Circuits: 8 configurable isolated I/O; Grouping: 4 isolated pairs.
Before commissioning IC660BBS101, which Parallel-Wiring Variant check matters most?
Manual or external parallel switching does not create Failed Switch reports.
Which replacement relationship is documented for IC660BBS101 when reviewing Parallel-Wiring Variant?
IC660BBS103 replaces IC660BBS101.
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