4205825 DRAGER 4205825 CARD 8 CHANNEL DISPLAY DRAGER 4205825
DRAGER 4205825
QUADGARD consists of a wall-mounted cabinet containing a power
supply board and a control & display board; additionally one to
four input channel boards can be fitted. The power supply board
provides a mains power supply for the system, and master relays.
The control & display board provides a character display and alarm
status LEDs. Each input channel board provides power to, and
measures the signal from, one gas measuring head.
A 4–20mA input channel board is used with two- or three-wire 4–20mA
heads and can supply up to 250mA at 24Vdc to the head. A SE Ex
input channel board is used with three-wire pellistor heads and can
supply up to 400mA at up to 9V.
The power supply board has connections for mains supply, four
master relays, subsidiary 24Vdc and remote Reset. The master relays
are normally configured as three common gas alarms and a common
fault alarm.
The control & display board mounted on the front panel has a two
line by twenty character display which shows the concentration of
gas at each measuring head, and status LEDs for each alarm. Push
buttons on the front panel allow alarms to be acknowledged and
Reset, and allow gas name, measurement units and measurement range
to be displayed. Full configuration, calibration and testing is
carried out using the , , , and Reset push buttons on the front
panel.
Each input channel board has connections for a measuring head,
three channel alarm relays and analogue output. The alarm relays
are normally configured as two gas alarms and a fault alarm. The
analogue output gives a 4–20mA or 0–20mA signal proportional to the
displayed gas concentration.
There are no potentiometers for calibration, although head current
adjustment on SE Ex channels is by potentiometer. As well as zero,
span and alarm set point adjustments, the following operations can
also be carried out:
·configure channel alarm relays to be latching or non-latching,
manual reset or auto reset, normally energized or energized on
alarm, rising or falling;
·configure system relays to be latching or non-latching, manual
reset or auto reset, normally energized or energized on alarm,
common or voting;
·set under-range and over-range fault levels;
·test channel and common relays and analogue output;
·set gas name, range and measurement unit for each channel.
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| Schneider | 170INT11003 | B&R | 3BP150.41 |
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| ABB | AO810 | B&R | 7BP704.0 |
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Advantages of our products:
1.Improve efficiency
2.Optimize plant operations
3.emission reduction
4.Avoid unplanned downtime
5.Provides the lowest Total Cost of Ownership (TCO)
6.provides integrated control, power, safety,
and information solutions for complete plant-wide control in a
scalable,
7.open architecture to take advantage of traditional or renewable
sources of energy!
8.new and original
Payment:T/T 100% in Advance
Lead Time : 3-5 Days
Minimum Order Quantity : 1 Piece
Warranty : 1 Year
