All models of the CA are exactly the same inside for the speed sensor input, except that the DPS and the SA versions happen to be prewired to a reed-switch type of spoke sensor. (which can be removed and replaced with a different one if you like). THe DP version is prewired to the yellow wire on the DP connector, to use a hall signal from the motor via the controller's DP connector.
There is a pullup resistor on the speed input pin (Sp) inside the CA to the 5v. So either a hall or switch type spoke sensor will work on either DP or DPS or SA version of the CA.
Almost all spoke sensors from bike computers are the switch type (reed switch), so you wire the two wires from the speed input on the CA to the ground wire on the CA.
If it's a three wire sensor, it is probably a hall. In that case, the signal wire goes to the speedo input, the power wire goes to the CA's 5v, and the ground wire goes ot the CA ground.
There isnt' actually any "signal" sent.
If it's a two wire sensor, then all it is, is a switch opening and closing, between the Sp pin and ground.
If it's a three wire sensor, then it's the same thing, except it's just the (digital) hall sensor grounding or not grounding the signal.
So you don't send a 5v signal to the Sp input, you just ground it momentarily to create the pulse.