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2.0.1 Trolley line and slip connector
The device feeding electricity to mobile equipment.It consists of two parts，trolley line-guide rails and slip connector-current collector respectively.
2.0.2 Signal cable
Cable for device which has a rated voltage of 500V AC or 1 000V DC and below and is used to transmit digital signal，analog signal，audio signal，or automatic signal.
2.0.3 Raceway
The kind of trough specially designed for laying and fixing wires and cables.
2.0.4 Resistor
The electrical device which is made with resistive material and a given form，and is capable of limiting the current in a circuit，or converting electric energy into heat，composed of a resistive element，a case，and lead-outs.
2.0.5 Brake
The device to decelerate or stop a moving part（or moving machine）or keep it motionless.
2.0.6 Limit switch
The control device whose contact is activated by the collision of the moving part of the machine to switch on/off the control circuit.
2.0.7 Rail clamp
The safety device for locking the rail-mounted crane on the track to resist wind and prevent sliding and overturning.
2.0.8 Controller
The device in an electrical drive，used to switch on/off its contact to issue a command，interlock with other control circuits，or transfer the circuit according to a certain logic，also known as master switch.
2.0.9 Variable-frequency device
Electrical power converter which converts the power frequency supply to another different frequency supply used in electrical driving system，and is controlled through the switch on/off of power semiconductor devices.
2.0.10 Programmable logic controller（PLC）
The electronic device of digital operation specially designed for industrial applications.It uses a programmable memory to store commands of implementing logic operation，sequential operation，timing，counting，and arithmetic operation，and can control various types of machines or production processes by digital or analog input and output.
2.0.11 Touch panel
The inductive liquid crystal display that can receive input signals such as touch and possesses the function of human-machine interaction.When a user touches icons on the display，the tactile feedback system on the display will drive the connected devices according to the preset program.It can replace the mechanistic push button panel.