Transcript سیستم آلارم دیجیتالی مجهز به ثبات خطا

Digital Alarm Annunciator
with event recorder
Description
 Alarm annunciator for use with all types
of digital inputs that provide a voltage
signal .
 Features 20 digital inputs that can be
classified in 4 groups with separate
output contacts .
 Also inputs 1&2 have the facility to
operate as trip circuit supervision relay.
Characteristics
 20 inputs for use with digital signals.
 Each input accepts voltage signals.
 Programmable 16 character LCD text for each
alarm.
 Current alarms are displayed and scrolled up on
2x16 LCD display.
 Alarm delay programmable within the range of 50
msec. to 600 seconds in steps of 50 msec. for each
input separately.
 20 LEDs with indication of new and acknowledged
alarms.
Characteristics (continued)
 Alarm inputs can be classified in 1 to 4 groups with
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separate voltage commons and separate output relays.
In each group if there is many alarms in same time, the
blinking frequency of the first alarm is different with
others.
Inputs 1&2 can be defined as inputs for trip circuit
supervision as a part of system operation with separate
voltage references.
LCD provides real time input sensing.
SD memory of 2G bytes for event logs with date & time
(unlimited).
Characteristics
(continued)
 PC based programming and reading of event logs,
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through USB link.
In addition to memory log , events can be recorded
in MODBUS-RTU protocol via RS485.
RS485 interface for field-bus communication.
Remote programming facility.
Standard MODBUS-RTU protocol.
Function
The MAL-20C features a
total of 20 programmable
alarms. Multiple alarms
can be assigned to the
same input group to
provide annunciation at
different input selectable
delays. An alarm is
annunciated when the
input passes above or
below a fixed level.
Function ( continued)
Annunciation of an alarm can
be displayed on any one of
the 20 LEDs located on the
front plate. Each LED will
indicate new alarms with
flashing
light
and
acknowledged alarms with
steady light. The user can
acknowledge all new alarms
by pressing the “Ack” key. If
the alarm input is removed,
it can be reseted by “RST”
key.
Function ( continued)
The front plate includes an illuminated LCD display
with 2 lines of 16 characters.
The LCD provides the user with a 16 character alarm
description.
Function (continued)
The system can operate
as an event recorder for
it’s inputs.
During event recording or
data transfer, the alarms
can be reported by their
description
or
their
number.
Function (continued)
Inputs 1 and 2, and output relay1 can be assigned to
be the inputs and output for trip circuit supervision
application.
Connection
The rear and front of the MAL20C
annunciator is illustrated here.
 The power supply plug-in
connector of the MAL20C includes
2 terminals, one for +60 to 180V
DC and one GND reference.
 The MAL20C includes two
standard interfaces for serial data
communication.
 The RS485 is intended for long
distance bus communication
between multiple units.
 The USB port for alarm setting
or data collection by a laptop or
computer .
Connection
rear view