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CH.2: TIU050 06 Apr 2000 PAGE 17
GFK-1819
Pull-up
and
Pull-down
switches are used to increase the signal level on the RS-485 bus. This is useful if
there is a long bus and a significant amount of attenuation is anticipated.
Termination
resistance of 120
Ω
must be placed across each end of the RS-485 bus. With switch 2 ON,
a 120
Ω
resistance is placed across the bus. This is only used if the TIU050/100/110 is the last device at
either end of the bus.
2.5 TIU050 Dimensions
TOLERANCES ARE +/- 0.01” [0.3mm] UNLESS STATED OTHERWISE
TIU050 CUTOUT DETAILS
3.27” [83 mm]
+0.02
-0.00
+0.5
-0.0
5.95” [151mm]
UP TO 0.04”[1mm] CORNER
RADIUS IS ACCEPTABLE
Figure 2.5 – TIU050 Cutout