Avtron SMARTSafe XR67 Instructions Manual

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T E L E P H O N E : ( 1 ) 2 1 6 - 6 4 2 - 1 2 3 0 • F A X : ( 1 ) 2 1 6 - 6 4 2 - 6 0 3 7
E - M A I L : t a c h s @ a v t r o n - i a . c o m • W E B : w w w . a v t r o n e n c o d e r s . c o m
DESCRIPTION
The Avtron XR67, SMARTSafe™ is a modular, two piece incremental
encoder for hazardous atmosphere applications (also known as a
tachometer or rotary pulse generator). It provides a two phase, A Quad
B frequency (pulse) output, with complements. The XR67 mounts on a
6.75" Face.
CAUTION
The XR67 is designed for use in hazardous applications
which require protection from gas or dust ignition for
safe operation. Proper selection, wiring and installation
procedures are essential to ensuring safe conditions.
Because the XR67 is modular, there are no bearings or couplings
required. This, combined with the latest magneto resistive (MR)
sensor technology, allows the XR67 to provide superior mechanical
performance and increased reliability.
An Avtron XR67 can be configured with one or two independent
outputs. Each output has six signals: (A, B) 90° out of phase, with
– –
complements (A , B ). A marker pulse with complement (Z, Z
provided.
Output resolution on the XR67 is determined by the sensor only.
Unlike older models, any PPRs can be mixed and matched. Selection
of the rotor is based only on the shaft mounting requirements (and not
PPR).
ADAPTIVE ELECTRONICS
A perfect duty cycle consists of a waveform whose "high" and "low"
conditions are of the same duration (50%/50%). It is possible over time
for the duty cycle and edge separation to change due to component
drift, temperature changes, or mechanical wear. The Adaptive
Electronics extend the life of the XR67 by constantly monitoring and
correcting duty cycle and edge separation over time.
The XR67 has been evaluated to be compliant with IEC60079-0:2007,
IEC60079-11:2011, EN60079-0:2009, EN60079-11:2012,
BSEN 61000-6-4:2007 and BSEN61000-6-2:2005 (Certificates of
conformity: TRAC12ATEX0002X, TRAC12ATEX 0003X, IECEx TRC
12.0009X, and IECEx TRC12.0001X.)
THE XR67 IS CERTIFIED FOR USE IN:
Group II, Category 2 (ATEX Zone 1), Gas Group IIC potentially
explosive atmospheres when marked CE 0539
IIC T4 Gb -40°C < Tamb < 80°C and used with an Avtron isolator
marked CE 0539 [II 2 GD] [Ex ib IIC Gb] -40°C<Tamb<80°C.
Ex
Group II, Category 2 (ATEX Zone 21), Dust Group IIIC potentially
explosive atmospheres when marked CE 0539
IIIC T200°C Db -40°C<Tamb<80°C and used with an Avtron isolator
marked CE 0539 [II 2 GD] [Ex ib IIIC Db] -40°C<Tamb<80°C .
Ex
Group II, Category 3 (ATEX Zone 2), Gas Group II_* potentially
explosive atmospheres when marked CE
-40°C<Tamb<80°C
*see chart in specification section and used with a power supply that
limits voltage and current per the chart in the specification section.
–
) is also
II 2 GD, Ex ib
Ex
II 2 GD, Ex ib
Ex
II 3 GD, Ex ic IIC* Gc T4
Ex
XR67
Encoder Instructions
XR67 SMARTSafe
MODULAR FOR HAZARDOUS
Group II, Category 3 (ATEX Zone 22), Dust group IIIC potentially
explosive atmospheres when marked CE
200°C Dc -40°C<Tamb<80°C.
See installation section for electrostatic charging hazard instructions
and other limitations.
INSTALLATION
WARNING
Installation should be performed only by qualified
personnel. Safety precautions must be taken to ensure
machinery cannot rotate and all sources of power are
removed during installation.
Equipment Group II, Category 2 (Zone 1), Gas group IIC, Dust
group IIIC (ATEX Zone 21): Available as a system only including
XR67 with line driver option 5 and an Avtron Isolator module XRB1 (P/N
B35134).
System parameters are:
Um= 250V
Uo (open circuit voltage) = 7.14VDC max.
Io (short circuit current) = 420mA max.
Co (system capacitance) = 13.5uF max.
Lo (system inductance) = 0.15mH max.
Encoder parameters are:
Ui (input voltage) = 7.14VDC max.
Ii (fault current) = 420mA max.
Ci (internal capacitance) = 11.9uF max.
Li (internal inductance) = 0mH max.
The isolator XRB1 can be supplied as a separate module for location
in a safe area or in an explosion proof box on a short flexible cable
tethered to the encoder.
Equipment Group II, Category 3 (Zone 2), Gas group IIC, Dust
group IIIC (ATEX Zone 22): Requires an XR67 with line driver option
7 and a SELV (Energy Limited) or equivalent power supply which limits
voltage and current to the values in the table in the specifications.
If current limit is not inherent in the power supply a separate fuse
between the power supply and encoder can be used to limit current.
NOTE:
Isolators, encoders and cable must be selected and
installed in accordance with the latest edition of
IEC/EN60079-14 and IEC/EN60079-25. Cable
characteristics must comply with IEC/EN60079-14 and
IEC/EN60079-25 and for zone 1 applications total system
capacitance between the isolator and encoder (including
cable) must be less than Co-Ci. Total system inductance
between the isolator and encoder must be less than
Lo-Li.
The equipment is intended for a fixed installation and
should be mounted so as to avoid electrostatic charging.
The XR67 is not considered as a safety device and is not
suitable for connection into a safety system.
1
MODEL
™
6 3/4" C-FACE MOUNT
APPLICATIONS
II 3 GD, Ex ic IIIC T
Ex