Category: ABB

Features and benefits

• 8 channels for 0 .20 mA, 4 .20 mA, 0 .5 V or 1 .5 V d.c., single ended unipolar inputs

• Single or redundant operation

• 1 group of 8 channels isolated from ground

• 12 Bit resolution

• Current limited transmitter supply per channel

• Advanced on-board diagnostics

• HART pass-through communication

The AI845 Analog Input Module for single or redundant applications.

The module has 8 channels. Each channel can be either a voltage or

current input when MTU TU844 or TU845 is used, when other MTUs

are used al channels become voltage or current inputs.

The voltage and current input is able to withstand an overvoltage or

undervoltage of at least 11 V d.c. The input resistance for voltage

input is greater than 10 M ohm and the input resistance for current

input is 250 ohm.

The module distributes the external HART compatible transmitter

supply to each channel. This adds a simple connection to distribute

the supply to 2-wire or 3-wire transmitters. The transmitter power is

supervised and current limited.

Technical specifications

Customer supplied MV MCB (breaker or vacuum contactor) 

(standard)

The ACS2000 needs to have direct and exclusive control over 

the MV Switchgear. The close, open and / or trip command 

must be wired directly from the frequency converter to the MV 

Switchgear. It is not permitted to wire the trip command 

through any PLC or DCS system if it is not certified to meet SIL 

3 level requirements.

The MV MCB (breaker or vacuum contactor) needs to be 

equipped with the following features: −−

 • 1 normally open and 1 normally closed contact to provide 

status feedback to the drive

See publication MV Switchgear – document number 

2UEB000095 for technical specifications

Integral MV fused disconnect / vacuum contactor package 

(optional)

 ABB can also offer a fused disconnect / contactor option for a 

flexible, self contained solution where no control coordination 

is required upstream. It provides a visible blade switch 

disconnect and integral input contactor with options such as 

motor protection relay, auxiliary power transformer and other 

customer controls.

Target groups and required qualifications

The drive presented in this manual is part of an

industrial environment where voltages are present

that contain a potential hazard of electric shock

and / or burn. For this reason, only personnel who

have a thorough knowledge of the drive and the

industrial environment and have obtained the

required qualification must handle, install, operate,

or maintain the drive.

The manual addresses personnel who are responsi

ble for unpacking, transportation, installation,

operation and maintenance of the drive. The per

sonnel must carry out the below listed tasks in a

manner that does not cause physical harm or dan

ger, and that ensures the safe and reliable func

tioning of the drive.

—

Commissioning of the drive must

only be performed by qualified

and certified ABB personnel.

Compatibility

FEN-31iscompatiblewiththefollowingencoders:

• Differentialpush-pullHTLencoders

• Single-endedpush-pullHTLencoders

• OpencollectorHTLencoders

• OpenemitterHTLencoders

￭Compatibledrivetypes

ToinvestigateifFEN-31iscompatiblewithaspecificdrivetype,refertotheordering

informationofthedriveorthedrivehardwaremanual.

Note:Beforemountingtheoptionmodule,setthesupplyvoltagejumpersasdescribed above.

The option module is to beinserted into the option slot of the drive. See the drive

hardware manual for more information.

The moduleis held in place with plastic retaining clips, a locking tab and one screw.

The screw also provides the earthing of the cable shields connected to the module

and interconnects the GND signals of the module and the drive.

Oninstallation of the module, the signal and power connection to the drive is

automatically made through a 20-pin connector.

Numbersinbrackets refer to the layout drawing in section layout.

Mounting procedure:

1. Pull out the locking tab(7)

2. Insert the modulecarefully into the option slot until the retaining clips lock the

module into position

3. Pushinthelocking tab(7)

4. Fastenthescrew(included) to the stand-off.

If you need to removetheadapter moduleafter it has been installed into the drive,

use asuitable tool (e.g. small pliers) to carefully pull out the locking tab.

FEN-31 HTLEncoderInterface

FEN-31 is an interface between the control board and an HTL encoder. It supports

various types of HTL encoders. A PTC, Pt1000 or KTY temperature sensor can be

attached to one of the connections of the FEN-31 interface.

FEN-31 offers an RS-422-standard-compliant TTL encoder emulation output and two

digital inputs. It also includes cable fault diagnostics for some HTL encoder types.

See the drive Firmware manual for details.

Note:Correctinstallation of thescrewisessentialforfulfilling the EMCrequirements

and for proper operation of the module.

Generalencoderwiringguidelines

Theencodersshouldbeconnectedtotheencoderinterfacemodulewithashielded

instrumentationcable,preferablywithtwistedpairs.Seetheencodermanualfor

additionalrequirements.Topreventtheencoderinputsfrombeingdisturbed,the

cableshieldmustbeconnectedtothechassis.Theconnectionismadeautomatically

throughthemetalhoodoftheplug,ifthecablesareconnectedthroughthecable

clampoftheplug.

A26 contactors are mainly used for controlling 3-phase motors and generally

for controlling power circuits up to 690 V AC or 220 V DC. 

The contactors can also be used for many other applications such as isolation, capacitor switching, lighting. 

The A… series 1-stack 3-pole contactors are of the block type design. 

– Main poles and auxiliary contact blocks: 3 main poles, 1 built-in auxiliary contact, 

front and side-mounted add on auxiliary contact blocks 

– Control circuit: AC operated with laminated magnet circuit

– Accessories: a wide range of accessories is available

The energy needed for operation is not supplied directly by the

auxiliary power supply, but is always “stored” in the capacitor which

acts as an energy accumulator, and therefore operation always takes

place with constant speeds and times, independently of the divergence

of the power supply voltage from the rated value.

The auxiliary power supply has the only aim of keeping the capacitor  charged.

Consumption is therefore minimal. The power required is less than

5 W. In order to re-instate the rated power value in the capacitor

after an operation, there is an inrush of 15 W for a duration of a few

tens of milliseconds. For the reasons indicated above, both for the

DCO and for the SCO version it is necessary to supply the auxiliary

circuits which recharge the capacitor with a continuous auxiliary

power supply of 5W (this value can reach 15W for a few milliseconds

immediately following each operation). Careful selection of the

components and a precise design make the electronic multi-voltage

feeder extremely reliable, unaffected by electromagnetic interference

generated by the surrounding environment and free of any emissions

which may affect other apparatus placed in the vicinity.

These characteristics have made it possible for the V-Contact VSC

contactors to pass the electromagnetic compatibility tests (EMC)

and obtain the CE mark.

ABB has implemented this technology in the field of contactors on

the basis of experience gained in the field of circuit-breakers with

magnetic drive.

The magnetic drive adapts perfectly to this type of apparatus thanks

to its precise and linear travel.

The drive, which is of bistable type, is fitted with an opening and a closing coil.

The two coils – individually energised – allow the drive mobile armature

to be moved from one of the two stable positions to the other.

The drive shaft is solid with the mobile armature and held in position

in a field generated by two permanent magnets (fig. A).

Energising the coil opposite to the magnetic latching position (fig.

A) of the core, the magnetic field is generated (fig. B), which attracts

and moves the mobile armature into the opposite position (fig. C).

Every opening and closing operation creates a magnetic field

concordant with the one generated by the permanent magnets, with

the advantage of keeping the intensity of the field itself constant

during service, regardless of the number of operations carried out.

Electrical life

The electrical life of V-Contact VSC contactors is defined in category AC3.

Interruption principle

The main contacts operate

inside the vacuum

interrupters (the level of

vacuum is extremely high:

13 x 10 -5 Pa).

On opening, there is rapid

separation of the fixed and

moving contacts in each

contactor interrupter.

Overheating of the contacts, generated at the moment they separate,

causes formation of metallic vapours which allow the electric arc

to be sustained up to the first passage through zero current.

On passage of zero current, cooling of the metallic vapours allows

recovery of high dielectric resistance able to withstand high values

of the return voltage.

For motor switching, the value of the chopped current is less than

0.5 A with extremely limited overvoltages.

Compliance with Standards

V-Contact VSC contactors comply with the Standards of the major

industrialised countries and in particular with the IEC 60470 (2000)

and GB/T 14808 Standards.

Operating characteristics

– Ambient temperature: – 5℃… + 40℃

– Relative humidity: < 95 %  (without condensation)

– Altitude: < 1000 m s.l.m.

For other conditions, please contact us.

Main technical characteristics

– Chopping current value ≤0.5 A

– Maintenance-free

​- Suitable for installation in prefabricated substations and switchgear

both of the card (slim line) and traditional type

– High number of operations

– Direct checking of contact wear

– Long electrical and mechanical life

– Remote control

– Multi-voltage feeder

– Bistable drive of the type with permanent magnets