ABBAdvant Controller 31 40 & 50 Series

. Presentation

The AC 31 brings accessibility to beginners and experienced automation users alike, for any

application with 14 to 1000 inputs / outputs and more, using the same set of basic

components.

From a compact machine fitted with a few automated functions to large installations spread

over hundreds of meter, and even kilometers, the AC 31 can fit your requirements.

It is therefore possible to realize distributed applications throughout a site, a workshop, or a

machine where each component (input / output unit, central unit) is close to the sensors /

actuators. The whole setup is connected by a single twisted pair over which all information

from the sensors is sent after processing by the central unit to the actuators, as well as

distributed intelligent units. The following communication interfaces are available, to extend the

AC 31’s possibilities and integration with the company's other automation systems:

MODBUS
, ASCII, ARCNET
, RCOM, AF100. The developments in this field are continual.

Many users on all the continents have realized numerous applications such as:

Machine control

Manufacture of floor boards

Assembly of electrical contactors

Manufacture of ceramic products

Metallic pipe welding, etc.

Controlling-commanding installations

Wharf cranes

Water treatment

Ski lifts

Wind power machines, etc.

Systems management

Climatic management

Building power management

Tunnel ventilation

Alarms in hospital environments

Greenhouse lighting / humidity, etc.

 General setup rules

An ABB AC 31 system always includes an AC 31 central unit. There are three types of central

units:

- The 40 series central unit, with a local inputs / outputs extensions interface

- The 50 series central unit, with a local inputs / outputs extensions interface

and a CS 31 bus interface

- The 90 series central unit, with a CS 31 bus interface

Each central unit incorporates a specific number of binary inputs / outputs and occasionally

analog. It is possible, depending on the central unit, to increase the number of inputs / outputs,

to add input / output extensions connected directly to the central units or remote input / output

units via the CS 31 twisted pair.

2.1. Central units with extensions

The 40 and 50 series. It’s possible to increase the number of inputs / outputs of the basic

central unit by adding up to 6 local extension units of either type, binary or analog (Figure 1-1).

2.2. Central units with CS 31 bus

The 50 and 90 series. It’s possible to increase the number of inputs / outputs of the basic

central unit by adding remote units. The central unit controlling the system is called the

MASTER central unit. The maximum bus length is 500 m without an amplifier and 2000 m with

3 amplifiers (1 NCB or NCBR unit enables bus amplification for 500 m).

The master central unit can manage up to 31 connection points called SLAVES, such as:

- A remote unit with extension possibilities: a maximum of 6 extension units comprising of a

maximum of 8 analog input channels and 8 analog output channels

- A simple remote unit (without extension) with analog or binary inputs / outputs

- A remote TCAD display

- An ABB NCSA-01 variable speed drive interface

- A high speed counter unit

- A central unit (50 series with extension possibilities, 90 series and the previous 30 series)

- Or any other device which disposes of a CS 31 communication (see Figure 1-2).

Comment:

A slave fitted solely with binary channels occupies 1 connection point.

A slave fitted with binary and analog channels occupies 2 connection points of the available

31.

The maximum number of remote ANALOG units depends on the MASTER central unit:

- 50 series: - a maximum of 31 remote analog input units

- a maximum of 31 remote analog output units

- a maximum of 15 extensible remote units (ICMK14F1) with analog input / output

extensions + 1 remote analog input / output unit (15 x 2 + 1 = 31)

- or a mixed binary / analog configuration within the previous limits

- 90 series: - a maximum of 12 remote analog input units

- a maximum of 12 remote analog output units

- or a maximum of 12 slaves with analog extensions

Other Option: You have a possibility to use and configure the CS31 bus in Modbus® slave or

master see chapter 7 communication Modbus®

.

2.3. Cabling techniques

Connecting a central unit without a remote unit is simple and corresponds to normal electrical

standards. The electrical connections of a AC 31 system which consists of remote units,

notably where there are numerous electrical cubicles, should adhere to the obligatory rules.

These rules are presented in chapter 4.

3. Operation of the 40 and 50 series central units

3.1. Functional diagram

The 40 and 50 series central units memory is composed of two distinct areas:

- A SRAM memory where the user program and data is loaded.

- A Flash EPROM memory which contains:

- a backup of the user program with the program constants,

- the configuration data,

- and the system program protected against access from the user program.

An incorporated battery, which is available only in the 50 series, also enables the backup of

internal variables.

The user program is a set of universal functions conceived by the constructor to cover all