4205825 DRAGER 4205825 CARD 8 CHANNEL DISPLAY DRAGER 4205825

Product Description

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.

           
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