I'm seeing several pre-fabricated "CAN-Bus" cables with (2) DB9, 120 ohm terminal resistor connections, while the cable's impedance is 100 ohms.
A. What is the purpose for this mismatch?
B. What potential problems could you see if used in a system that calls for a 120 ohm cable?
C. Typically, 120 ohm cable requires (2) 120 ohm terminal resistors. If the (2) terminals equate to 60 ohms, why would it matter that the impedance of the cable be 120 ohms?
Grid Connect Inc. GC-CAN-CAB-2MT-GC
***LAPP's Data Sheet lists 100 - 120 ohm, but every site lists it as 100 ohm.