How are the relays wired inside the 2503 Multiplexer (Mux)

[skinnedknuckles]

How are the relays inside the 2503 Multiplexer wired and how do they direct electric signals from one connection to another?

[skinnedknuckles]

I made color drawings showing how a signal is passed from external connections to relays and back to external connections for most topologies.  The diagram on the left shows the path of the signal for one of multiple switch settings.  The particular switch setting shown is displayed to the right of the drawing the same way it is shown with the switch soft front panel display found in NI MAX.  Please contact me if you find any errors so I can make corrections.

This topology offers 48 connections to AB0+ but requires an external common connection if a second wire is needed.

2503_1-Wire 48x1 Mux

This topology offers 24 unique 2-wire connections to AB0

2503_2-Wire 24x1 Mux

This topology offers 12 unique 2-wire options for AB0 and 12 unique 2-wire options for AB1.  They can be changed independently.

2503_2-Wire Dual 12x1 Mux

This topology offers 6 unique 2-wire connections for COMMON1, AB0, AB1 and COMMON3.  They can be changed independently.

2503_2-Wire Quad 6x1 Mux

This topology offers 12 unique 2-wire options for AB0 and 12 unique 2-wire options for AB1.  It is the same as the 2-Wire Dual 12X1 topology except that the selected channels move in pairs 0 & 12, 1 & 13, 2 & 14, 3 & 15, 4 & 16, 5 & 17, 6 & 18, 7 & 19, 8 & 20, 9 & 21, 10 & 22, and 11 & 23. 

2503_4-Wire 12x1 Mux

[skinnedknuckles · Accepted solution]

This is the same answer as above with improved images.

I made color drawings showing how a signal is passed from external connections to relays and back to external connections for most topologies.  The diagram on the left shows the path of the signal for one of multiple switch settings.  The particular switch setting shown is displayed to the right of the drawing the same way it is shown with the switch soft front panel display found in NI MAX.  Please contact me if you find any errors so I can make corrections.

This topology offers 48 connections to AB0+ but requires an external common connection if a second wire is needed.

2503_1-Wire 48x1 Mux

This topology offers 24 unique 2-wire connections to AB0

2503_2-Wire 24x1 Mux

This topology offers 12 unique 2-wire options for AB0 and 12 unique 2-wire options for AB1.  They can be changed independently.

2503_2-Wire Dual 12x1 Mux

This topology offers 6 unique 2-wire connections for COMMON1, AB0, AB1 and COMMON3.  They can be changed independently.

2503_2-Wire Quad 6x1 Mux

This topology offers 12 unique 2-wire options for AB0 and 12 unique 2-wire options for AB1.  It is the same as the 2-Wire Dual 12X1 topology except that the selected channels move in pairs 0 & 12, 1 & 13, 2 & 14, 3 & 15, 4 & 16, 5 & 17, 6 & 18, 7 & 19, 8 & 20, 9 & 21, 10 & 22, and 11 & 23. 

2503_4-Wire 12x1 Mux