ABB 81EU01 PROCONTROL P Input/Output Signal Conditioning

ABB PROCONTROL P is a digital process control system designed for power plants  . It was introduced in 1982 and is known for its reliability and functionality [2].

Key features of ABB PROCONTROL P

• Flexibility: It can be used for a variety of applications, from small local control systems to large generation units
• Openness: It can be integrated with existing systems, making it suitable for retrofitting and refurbishing existing plants
• Functionality: It offers a wide range of features for boiler protection, turbine control, engineering, and diagnostics

Application

The universal input module connects the following transmitters:

Binary Transmitters

• Single and changeover contacts with or without line monitor
• Inductive initiators according to NAMUR DIN 19234
• Electronic transmitters

Analog transmitters for current signals

• Twin-wire transducers 4 … 20 mA supplied from the input module
• 4-wire transducers 0 … 20 mA, 4 … 20 mA, and 0 … 5 mA with an external power source

Temperature transducers

• Thermocouples with transducers for current signals of 4 … 20 mA and cold junctions inside the transducer. Linearization is on the input module.
• Resistance thermometers with transducers for current signals of 4 … 20 mA

The module consists of 16 function units. Each function unit may be used for any type of input mode. Any combination is possible. Parameter allocation and setting are programmed easily via the configuration list. The programmed values are stored in an EEPROM to ensure that they are not lost in the event of a power failure. They can be changed anytime.

Up to four limit values can be allocated to each analog signal. Up to four independent correction and filter calculations can be performed independently on each input module. Programming is done by function block structuring. Observe the boundary conditions for this application.

Features

The module can be plugged into any station of the PROCONTROL bus system. It incorporates a standard interface for the PROCONTROL station bus.

The module transmits the input signals and/or converted input signals in telegrams via the station bus to the PROCONTROL bus system. Before transmission, the telegrams are checked and provided with parity bits. This ensures that the receiving module can check for fault-free transmission.

The module checks the telegrams received over the station bus, e.g., those intended for corrective calculations, by their parity bits for fault-free transmission.

Provision is made to eliminate interference among the function units of the module and the station bus.

A short-circuit-proof and monitored transmitter power source is available for each function unit, suitable for various applications.

In case the internal monitoring circuits or the input signal monitor respond, disturbance annunciation ST (general disturbance) will be indicated on the front panel of the module. Response of the internal monitoring circuits is indicated as disturbance annunciation SG (module disturbance) on the front panel of the module.