Practical TCP/IP and Ethernet Networking for Industry

'VVKTJO^' -RUYYGX_

Physical layer

Layer one of the ISO/OSI reference model, concerned with the electrical and mechanical

specifications of the network termination equipment.

PLC

Programmable Logic Controller.

PLL

Phase Locked Loop.

Point-to-point

A connection between only two items of equipment.

Polyethylene

A family of insulators derived from the polymerization of ethylene gas and characterized

by outstanding electrical properties, including high IR, low dielectric constant, and low

dielectric loss across the frequency spectrum.

Polyvinyl chloride (PVC)

A general purpose family of insulation whose basic constituent is polyvinyl chloride or its

copolymer with vinyl acetate. Plasticizers, stabilizers, pigments and fillers are added to ...