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 120Ω must be placed across each end of the RS-485 bus. With switch 2 ON,
a 120Ω 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