ENMET MEDAIR 2200 - Manual (Page 9)

M ED A IR 2200 ENMET Corporation
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3.2 Sample Air Supply
Tap the pipe or tank containing the breathing air and use appropriate fittings to connect the sample input hose. The
instrument is designed to operate from an air supply pressure 55
PSIG .
The sample air exits the instrument from the hole plug located on the bottom of the enclosure. Take care not to
obstruct this exit port.
3.3 Power Supply
The input power can vary from 100 to 240 V AC , 50/60 Hz. Mains power should be connected to the Power Input
Terminal J23 and the ground screw J21 . See Figure 2 for location.
W ARNING : Continuous gas detection and alarm systems become inoperative upon loss of primary power.
Upon supplying air and power to the instrument:
The green power on LED is lit.
The display backlight is lit, and instrument will step through a start-up sequence: unit serial number, software
revision and gases monitored may be shown on the display.
The instrument may go into alarm briefly, but the sensors stabilize quickly. If the instrument persists in alarm,
acknowledge the alarm by pressing the
A UDIO D EFEAT / A LARM A CKNOWLEDGE switch. If alarm persists longer than
30 minutes, call ENMET customer service personnel.
3.4 Outputs
Two types of alarm outputs are available, relay contacts and 4-20mA outputs.
Figure 2A: Relay, Input and Output Terminals
Relay 1
Channel 1
Alarm 1
Relay 2
Channel 2
Alarm 1
Relay 3
Channel 3
Alarm 1
Relay 4
Channel 4
Alarm 1
Relay 5
Channel 1-4
Alarm 2
Relay 6
System Fault
Connector
Dew Point Sensor
Connector
4-20mA Input
Connector
4-20mA Input
Connector 2
Channel 3 & 4
4-20mA Output
Connector 1
Channel 1 & 2
4-20mA Output
Connector RS485
Connector RS232
Connector RS485
Ground Screw J21
Power Input
Terminal J23
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