ABB PFSK165 Communication Interface

The ABB PFSK165 Communication Interface is a communication interface standard developed by ABB for use in industrial automation applications. It is a serial communication interface that uses a Manchester coded Phase-Frequency Shift Keying (PFSK) modulation scheme with a baud rate of 165 kbps. The PFSK165 interface is typically used to connect ABB devices, such as programmable logic controllers (PLCs) and drives, to other devices, such as operator interfaces and personal computers.

The PFSK165 interface is a two-wire interface that uses a differential signaling scheme. This means that the data is transmitted on two wires, with the data signal being the difference between the voltages on the two wires. This type of signaling is less susceptible to noise than single-ended signaling, which makes it well-suited for use in industrial environments.

The PFSK165 interface uses a Manchester code to transmit data. In Manchester code, each bit of data is represented by a transition in the signal level. A high-to-low transition represents a logic 0, and a low-to-high transition represents a logic 1. This coding scheme ensures that there is always a transition in the middle of each bit period, which makes it easier for the receiver to synchronize with the transmitter.

The PFSK165 interface has a number of features that make it well-suited for use in industrial automation applications. These features include:

• High noise immunity: The differential signaling scheme and Manchester coding make the PFSK165 interface less susceptible to noise than other communication interfaces.
• Simple wiring: The PFSK165 interface only requires two wires, which makes it easy to install and maintain.
• Deterministic performance: The Manchester coding scheme ensures that the data is transmitted reliably, even in harsh industrial environments.
• Wide range of applications: The PFSK165 interface can be used for a variety of applications, including data acquisition, control, and monitoring.