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1-4
Airnet® II 4-Channel Particle Sensors Operations Manual
Chapter 1
: Getting Started
Physical Description
Back
All connectors are found on the back of the unit’s chassis, including:
•
Electrical Power
– Power can be provided through the 24 VDC power connector
(see Figure 2-5, “24 VDC Power Connector,” on page 2-5) when this option board
has been purchased, or through the Ethernet connection if Power over Ethernet
(PoE) is being utilized.
•
Ethernet
– The UTP Ethernet connector allows the unit to communicate with
Facility Net by connecting an Ethernet cable from the particle sensor to the
Ethernet hub. The Airnet II 4-Channel particle sensor can also communicate via
Modbus TCP or via an Ethernet connection when this feature is activated. When
connected to a router or PoE brick (injector) that provides PoE the Ethernet
connection will power the system also.
•
RS-232
– The RS-232 RJ-11 jack is used for configuring the unit and performing
limited diagnostics.
•
Vacuum Source
– The barbed fitting allows a source of vacuum (> 12 in. Hg) to be
supplied to the unit.
•
Calibration
– Three SMB connectors are available for calibrations only and are
not used for system operation.
•
Optional 24 VDC Input/4-20 mA Output
– The 12-pin Molex
®
connector allows a
24 VDC input power supply to power the unit, and/or outputs scaled 4-20 mA
signals that transmit the following:
•
Channel 1, 2, 3, and 4 particle data
•
Instrument status
Bottom
The bottom of the Airnet II 4-Channel unit contains four tapped-thread fittings that
match the countersunk screw holes on three of the four mounting brackets. These
brackets are used to mount the Airnet II 4-Channel to vertical or horizontal surfaces
(refer to
Positioning or Mounting the Unit
on page 2-4 for illustrations and part
numbers for the brackets).
NOTE:
If any modifications are made to the factory connector, make sure to verify
the 24 VDC and GND lines before connection to the Airnet II 4-Channel unit.
NOTE:
For best results, use a CAT 5 UTP cable. If PoE is used, you must use a
shielded CAT 5 UTP cable or ground the unit locally.
NOTE:
Airnet II 4-CH vacuum connection is a 1/4-inch tubing connection.