Lika Electronic October 2016 Newsletter - Featured this month - XC77 / XAC77 is the high performance incremental, fieldbus and Ethernet encoder family with ATEX certification from Lika Electronic. It combines robustness, accuracy and flexibility for use in hazardous and extreme environments and the roughest applications and is ideally suited for a variety of tricky sectors such as mining industry, iron and steel mills, cranes, portal cranes and hoists, heavy vehicles, mobile equipment, construction machinery, shipbuilding industry, marine installations and offshore facilities, oil and gas industry, wind turbines and solar power plants.

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Smart encoders & actuators
2016
Oc tober
XC77 • XAC77 ATEX certified encoders
The tough accuracy for hazardous and heavy-duty applications
XC77 / XAC77 is the high performance incremental, fieldbus and Ethernet encoder family with
ATEX certification from Lika Electronic. It combines robustness, accuracy and flexibility for use
in hazardous and extreme environments and the roughest applications and is ideally suited for
a variety of tricky sectors such as mining industry, iron and steel mills, cranes, portal cranes and hoists,
heavy vehicles, mobile equipment, construction machinery, shipbuilding industry, marine installations
and offshore facilities, oil and gas industry, wind turbines and solar power plants.
• Comprehensive range of incremental and absolute single- and multiturn encoders
• Category 2 ATEX encoders for use in zones 1, 2, 21, 22
• Category 3 ATEX encoders for use in zones 2, 22
• Ultra-rugged enclosure with oversized frame walls and IP65 protection rate
• Aluminium or stainless steel construction
Compliance with the ATEX (“ATmosphères EXplosibles”) Europe-
an Directive is a legal requirement in all European Union Member
States for any equipment intended for use in potentially explosive
atmospheres.
Equipment and protective systems for use in hazardous areas must
comply with the statements of the ATEX Directive 2014/34/EU,
commonly referred to as the new ATEX “product” directive, which
is applicable from 20 April 2016 and replaces the previous Directive
94/9/EC.
Lika Electronic has developed a comprehensive range of ATEX certi-
fied encoders: XC77 series, XAC77 series and XAC77 FB series.
They are designed to cover a wide variety of critical applications in
hazardous and harsh areas “in which explosive atmospheres caused
by gases, vapours, mists or air/dust mixtures are likely to occur occa-
sionally” (category 2 encoders) and “in which explosive atmosphe-
res caused by gases, vapours, mists, or air/dust mixtures are unlikely
to occur or, if they do occur, are likely to do so only infrequently and
for a short period only” (category 3 encoders).
They are engineered to operate reliably under rough conditions and
built to last. They offer an ultra-rugged aluminium or steel hou-
sing with oversized frame walls and encompass superior opto-e-
lectronics for accurate and dependable enduring service.
They are able to handle the most severe applications affected by
high radial and axial shaft loads, mechanical stresses, extreme shock
and vibration impacts as well as large temperature fluctuations.
Furthermore they can add special surface treatments to ensure safe
protection against salt water, corrosion, cleaning agents and che-
mical contaminants.

2. Category 2 encoders suitable for zones 1, 2, 21 and 22
XC77 and XAC77 series ATEX certified encoders are “high pro-
tection” category 2 compliant encoders: they provide an airtight,
explosion-proof and flameproof enclosure (made of either alumi-
nium or steel) and high ignition protection level against both gas
and dust explosive atmospheres and are intended for use in Zones
1, 2, 21 and 22 and in the temperature class T6 (T85°C).
They come in both incremental (XC77 series) and absolute (XAC77
series) versions and the most complete range of communication
interfaces. Incremental versions provide NPN, Push-Pull, Line Dri-
ver and Universal level output signals. Absolute versions support a
variety of electrical, fieldbus and Ethernet interfaces: SSI, BiSS, bit
parallel, current/voltage analogue, with integrated cam switch
programmer, Profibus-DP, CANopen DS406, DeviceNet, Profi-
net IO, POWERLINK, EtherCAT and Modbus TCP.
Incremental versions have a resolution up to 10,000 ppr; absolute
singleturn versions have a resolution of 18 bits; while absolute mul-
titurn versions have a resolution of 30 bits.
They bear the following ATEX marking:
Category 3 encoders suitable for zones 2, 22
XAC77 FB series ATEX certified encoders are the fieldbus and
Ethernet absolute encoders designed to provide “normal protection”
in potentially explosive atmospheres (category 3) and are allowed to
be used in Zones 2 and 22 and in the temperature class T5 (T100°C).
They are offered in absolute version and the most complete range of
communication interfaces: SSI, BiSS, bit parallel, current/voltage
analogue, Profibus-DP, CANopen DS406, DeviceNet, Profinet
IO, POWERLINK, EtherCAT and Modbus TCP.
The resolution is 18 bits in singleturn versions and 30 bits in multi-
turn versions.
They bear the following ATEX marking:
II3 GD, Ex nA IIB T5 Gc, Ex tc IIIC T100° Dc, IP65
II2 GD, Ex d IIC T6 Gb, Ex tb IIIC T85°C Db, IP65
II2 GD, Ex d IIB T6 Gb, Ex tb IIIC T85°C Db, IP65