VIU STEPUP
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4-6
SIG-00-07-11 SEPTEMBER 2012 (REVISED OCTOBER 2019)
Version No.: B.2
Signal 2, Head A will use Box 1, Input #5, which automatically programs Input #5 as red; Head
B will use Box 1, Input #6, , which then automatically programs Input #6 as green, #7 as yellow
and #8 as red; and Head C will use Box 1 Input #9, which automatically programs Input #9 as
red (see Figure 4-6.
Figure 4-6 Signal 2, Heads A, B, and C
Switch 1 will use Box 1, Input #10, which automatically programs Input #10 as Reverse and
Input #11 as Normal (see Figure 4-7).
Figure 4-7 Switch 01
If more than 20 inputs are required, auxiliary VIUs can be added via an Ethernet LAN. Each
additional VIU will add 20 more inputs to the number of available inputs. The user can choose to
map any of the inputs on the used units.
The VIU Wayside Interface Application can support up to 6 signals, 6 switches, and 6 hazard
detectors (block faults {Bf}), and a maximum of 4 boxes. The typical application allows for 1
main unit and 3 auxiliary units, giving a total of 80 inputs.
4.4
SAMPLE ASPECT CODES DECODED BY VIU
The following aspect codes are typical of what is sent to the WSM by the VIU.
Sig02, Head B
Sig02, Head C
Sig02, Head A