DC Voltage Signals

Types of DC Voltage Signals

Five Types of DC Voltage Signals are used:

• Analog Signals
• Digital Signals
• Designated Value Signals
• Coded Ground Signals
• Transistor Signals

DC Voltage Signals are based on either 5 Volts or 12 Volts.

DC Voltage Signals

DC Analog Signals

Analog signals transmit information through an electrical circuit by regulating or changing the current or voltage.

Three (3) sources of analog signals are:

• NTC Sensors - Negative Temperature Coefficient
• PTC Sensors - Positive Temperature Coefficient
• Potentiometers

Read more about NTC/PTC Troubleshooting for potential problems in wiring and schema understanding.

DC Digital Signals

Digital Signals transfer information through electrical circuit, by switching the current ON (1) or OFF (0).

Unlike Analog Signals which uses voltage, a digital signal has only two possible states, control voltage (1) or zero voltage (0).

DC Digital Signals

Two (2) types of Digital Signals:

• Switched (High) Signals - B+
• Switched (Low) Signals - B-
• Modulated Square Wave Signals

Designated Value Signals

The page has been moved to dedicated page “Designated Value Signals”, of topic DC Digital Sensors.

Coded Ground Signals

The page has been moved to dedicated page “Coded Ground Signals”, of topic DC Digital Sensors.

Transistor Signals

The page has been moved to dedicated page “Transistor Signals”, of topic DC Digital Sensors.