The difference between a 2 wire and a 4 wire is the power supply.A 4 wire has 2 wires for power supply and 2 for the control signal. A 2 wire is a 4/20ma transmitter that uses the leakage current thru the load to power the transmitter.IE a 2 wire prox, versus a 3 wire prox.he signal will of course always vary between 4 and 20mA, but not the power wires. The big difference is that a 2-wire transmitter have a higher minimum voltage drop (typically 10V) than the 4-wire transmitter. That means there are more voltage drop availiable for the wire.
Stroking or smoothing his tie or lapel. This is another preening gesture, and it means he is trying to look his best for you. Similar to running his fingers through his hair, this type of body language signifies that he wants you to find him attractive. Standing with his hands on his hips.
Arm body language. Techniques > Use of body language > Parts-of-the-body language > Arm body language. Expanding | Shaping | Raising | Weapon | Crossing | Reaching forward | Pulling back | See also. The arm is an interesting appendages with a ball at the top, a hinge in the middle, and with a rather complex toolset at the end.