Chapter 1
Getting Started
Airnet II Particle Sensor Operations Manual
Page 1-5
Instrument Connections
Airnet II 301, 501, 501A, 510, and 510XR
(Polycarbonate enclosure version):
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
on page 2-7) or though the Ethenet 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.
•
Modbus is also communicated via this connection when it is configured.
•
When connected to a router 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 house vacuum (> 12 in. Hg
for 510/510XR units and > 11 in. Hg for 301 and 501/501A units) to be supplied to
the unit.
• Calibration
– A BNC connector is available for calibrations only and is not used for
system operation.
• Optional 4-20 mA Output
– The six-pin Molex
®
connector outputs a scaled 4-20
mA signal that transmits the following:
•
Channel 1 and 2 particle counts
•
Instrument status messages
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 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 301, 501, 501A, 510, and 510XR connection is a 1/4 inch tubing
connection.
