Assembly, Figure 2 t8846 speed input channel overview, Trusted – Rockwell Automation T8846 Trusted Speed Monitor IFTA (SIFTA) User Manual

Page 9: Speed monitor ifta t8846

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Trusted

Speed Monitor IFTA T8846

Issue 2 Apr 10

PD-T8846

2. Assembly

The T8846 Speed Input Field Termination Assembly (SIFTA) is an integral part of the overall T8442
Speed monitor system. It is DIN rail mounted, containing passive signal conditioning, power
distribution and protection components.

Each T8442 Speed Monitor Module hot swap pair requires a single T8846 SIFTA when installed in a
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system.

The SIFTA has nine identical speed transducer signal conditioning circuits arranged as three groups
of three.

Each of the three groups is a galvanically isolated entity, with its own field power and I/O signal
interfaces.

Multiple sensors must be employed for SIL3 applications.

Figure 2 T8846 Speed Input Channel Overview