BEKA BA374NG, Руководство пользователя

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1. DESCRIPTION
The BA374NG is an Ex nA and Ex tc certified, field
mounting instrument with two inputs that can be
configured on-site as a Timer or as a Clock.
As a Timer the BA374NG can measure and display
the elapsed time between external events, or control
external events via the status output or the optional
control outputs.
When configured as a Clock, the BA374NG can
display time in a variety of formats and the optional
control outputs may be configured to turn
on and off
at pre-set times.
This instruction manual is divided into three
sections.
Common features
2. Certification
3. System design for hazardous areas
4. Installations
5. Accessories
Timer
6. Operation as a timer
7. Timer application example
8. Maintenance
Clock
9. Operation as a clock
10. Clock configuration example
11. Maintenance
The BA374NG has been ATEX certified Ex nA and
Ex tc by Notified Body Intertek Testing and
Certification Ltd and complies with the European
ATEX Directive 2014/34/EU.
The main sections of this manual describe ATEX
Ex nA gas certification. See Appendix 1 for details
of the BA374NG ATEX Ex tc dust certification.
For international applications the BA374NG also has
IECEx certification which is described in
Appendix 2.
For applications in the USA and Canada the
BA374NG has ETL and cETL certification which is
described in Appendix 3.
This instruction manual supplements the
abbreviated instruction sheet supplied with each
instrument.