Rockwell Automation T8846 Trusted Speed Monitor IFTA (SIFTA) - Manual (Page 23)

Trusted
TM
Speed Monitor IFTA T8846
Issue 2 Apr 10 PD-T8846 23
4.4. Chassis Ground Connections
The chassis ground plane on the T8846 is common across all groups of speed inputs and Speed
Monitor interface connections.
The screening shield of each speed input signal cable should be connected to chassis ground at the
T8846 assembly.
Each speed input channel has a terminal to allow connection of the screening shield to chassis
ground, Refer to section 3.3 for connection details.
The T8846 chassis ground plane must be connected to a local chassis ground close to where the
assembly is mounted.
There are two studs provided on the assembly to allow this connection to be made. These are marked
as TERM1 & TERM2 on the PCB silkscreen legend.
Note : Only one connection should be made between the T8846 and local chassis ground.
Figure 9 Chassis Ground Connections