BEKA BA364E, Руководство пользователя

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1. DESCRIPTION
The BA364G and BA364E are field mounting,
intrinsically safe two input Counters which will accept
pulses on one or both inputs.
Both may be
configured to show one of the following totals in
engineering units on their eight digit displays:
Input A + Input b
Input A - Input b
Input A direction controlled by Input b
Quadrature input
(Input A and Input b electrically 90
o apart)
A smaller six digit display may be activated to show
the composite pulse rate in engineering units per
second, minute or per hour.
In addition to simple counting applications, the
quadrature input decoder allows the direction of
movement and position of a shaft or cable to be
displayed.
The optically-isolated pulse output may be
configured to synchronously retransmit either of the
two inputs or a scaled output when least significant
digit of the total display is incremented.
This instruction manual supplements the abbreviated
instruction sheet supplied with each instrument.
The BA364G and the BA364E are functionally
identical and have similar certifications, but differ in
mechanical
construction and options. The
differences are summarised in the following table.
BA364G BA364E
Separate terminal
compartment.
No Yes
Pulse output Yes Yes
Backlight Option Yes
4/20mA output. Option Yes
Dual alarms Option Yes
Certification
IECEx Gas & dust Gas
ATEX Gas & dust Gas
ETL & cETL Gas & dust Gas & dust
The main sections of this instruction manual describe
the BA364G, but also apply to the BA364E. Details
of the BA364E mounting and terminals are contained
in Appendix 4.
The BA364G and BA364E have been ATEX certified
intrinsically safe by Notified Body Intertek Testing
and Certification Ltd and comply with the European
ATEX Directive 2014/34/EU.
The BA364G has
ATEX gas and dust certification, but the BA364E
only has ATEX gas certification.
The main sections of this manual describe ATEX gas
certification. ATEX dust certification of the BA364G
is described in Appendix 1.
For international applications the BA364G and
BA364E also have IECEx certification which is
described in Appendix 2.
The BA364E does not
have IECEx dust certification.
For applications in the USA and Canada the BA364G
and BA364E Counters have ETL & cETL certification
which is described in Appendix 3.
2. OPERATION
Fig 1 shows a simplified block diagram of the
BA364G Counter. The instrument has two inputs, A
and b, which can be individually configured to accept
pulses from most types of sensor. The BA364G can
display the total number of pulses received from
each input, or their sum or difference, together with
associated rates on a separate display.
Fig 1 BA364G block diagram
The BA364G can be supplied with any of the
following factory fitted accessories:
Internally powered display backlight
Dual isolated alarms
Isolated 4/20mA output
4