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6.2
Transparent Switching Module Truth Tables
Table 1 - Input Line Group Selection vs. Output Channel 1-2 for Input Signals 1-16 in Mode 3
0 = not selected input line; no active output signal is available.
1 = selected input line; an active output signal is available.
T = Invalid Selection or indeterminate.
Channel 1 allows line 1-16 to be selected and is limited to lines 1-8 when Channel 2 is active in lines 9-16.
Channel 2 allows line 1-16 to be selected and is limited to lines 9-16 when Channel 1 is active in lines 1-8.
Channel 2 Select
Line 9-16
* If Channel 1 is selected first it disables Channel 2 from using the same Line group.
** If Channel 2 is selected first it disables Channel 1 from using the same Line group.
Model 458-SM-2-16 Transparent Switching Module
Line Input Selects
Line 1-8
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
Channel 1 Select
Line 9-16
Line 1-8
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
Active Outputs
Channel 1
Channel 2
0
0
1
0
1
0
T
0
0
1
T*
T**
T*
T**
T
T**
0
1
1
1
T*
T**
T
T**
0
T
T*
T
T*
T
T
T
Page 11 of 14
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