Switch 1
Switch 2
Switch 3
PAGE 26 | 06 Apr 2000 | CH. 4: TIU110/111/112/113 |
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4.5.1TIU11X Configuration of the RS-485 Port
The configuration bank (shown in Figure 4.8) sets the parameters of the RS-485 port as described in Table 4.1.
Table 4.1 – Configuration Bank
ON: Pull-up (must be used together with switch 3)
OFF: no Pull-up
ON: 120Ω termination
OFF: no termination
ON: Pull-down (must be used together with switch 1)
OFF: no Pull-down
Switch 4Reserved for future use
NOTE: Switch 1 and 3 must be used together. Either both pull-up and pull-down are used or neither is used.
Pull-upand Pull-downswitches 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 should only be used if the TIU050/100/110 is the last device at either end of the bus.
4.6TIU11X Dimensions
5.95” [151mm]
3.27”+-00.0.002[83+-00.0.5mm]
UP TO 0.04”[1mm] CORNER
RADIUS IS ACCEPTABLE
TIU11X CUTOUT DETAILS
TOLERANCES ARE +/- 0.01” [0.3mm] UNLESS STATED OTHERWISE
Figure 4.8 – TIU11X Cutout
