The concord 4 will need to be removed and replaced with the IQ Pro.
The IQ Remote also uses 12V DC but does require 1 Amp which the Concord 4 or the IQ Pro will not be able to provide. This is why it is always recommended to use the included power supply.
The link below may help but you will need to cut off the barrel connector end from the provided wire and splice it where the keypad will be installed and use B-Connectors.
When using 18 gauge wire, you can go up to 98 feet. When using 22 gauge wire you can go 22 feet. If you double up the existing wires like in the link above, you may be able to go about 79 feet from the keypad to the transformer