Remove all power from machine:
(Refer to your manual)
For 4-20ma operation:
Locate CTB1 (Customer Terminal Block 1, on rear of machine). Install 249 ohm resistor (supplied with machine) across pins 1 & 2. Connect 4-20ma source across 1 & 2 (observing polarity + to pin 1 and - to pin 2).
Skip to Restore Power Below:
For 0 - 10V DC input, Do Not Install Resistor (remove if installed previously). Connect 0 - 10v DC input to pins 1 & 2, again observing polarity (+ to pin1 and - to pin2).
Restore power:
Using touchpad on front panel:
Press 
once:
Observe: System Options
Press once more
Observe: Start From Front
Press arrow up key once 
Observe: Control from Front Panel
Press arrow over key once 
Observe: Control From Rear Panel
Press Home Button 
Machine is now in rear panel control and will respond to rear panel inputs only. In this mode, touchpad will not respond to power level adjustments.
