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Automation Components, Inc.

2305 Pleasant View Road  |  Middleton, WI 53562

Phone:

 1-888-967-5224  |  

Website:

 workaci.com

Page 1

FIGURE 1: 

ENCLOSURE

DIMENSIONS

PM2.5-ROOM                                                                                                                   

Installation & Operation Instructions

Phone:

 1-888-967-5224

Website:

 workaci.com

GENERAL INFORMATION

“Particulate matter” (PM) is the general term used to 
describe solid particles and liquid droplets found in 
the air. The PM2.5 series of transmitters are designed 
to detect particles less than 2.5 µm in diameter 
include smoke, smog, bacteria, fine dust and liquid 
droplets, and report the particle concentration of the 
monitored environment. The unit utilizes a laser 
particulate matter sensor to detect particle sizes 
from 0.3 ~ 2.5 µm. The sensor has good long-term 
stability with an accuracy 10% reading or 10 µg/m3. 
The room unit features field selectable outputs, 4-20 
mA, 0-10 VDC, and Modbus RTU (RS485), relay, and 
display.

The sensor has two jumper selectable working 
modes for monitoring PM. The Normal Mode 
monitors the environment continuously and Auto 
Mode reduces the measuring time to extend service 
life. The sensor default is set to Auto Mode.

IMPORTANT PRECAUTIONS

•  This product uses a laser particulate matter 

sensor. It is strictly prohibited to be 

disassembled. It is dangerous if the human 

body is exposed to the laser directly.

•   If the environment exceeds the measurement 

range for an extended period, it may lead to a 

decrease of the measurement accuracy. 

• The performance of the sensor may be 

decreased due to excessive dust and oil mist, 

etc. in extreme environments. (ie: high 

humidity, high temperature)

•   Avoid strong light into the housing. 

•   Avoid vibration. 

MOUNTING INSTRUCTIONS

For optimal temperature readings, follow these 

tips:  

• Avoid air registers, diffusers, vents, and 

windows 

• Avoid confined areas such as shelves, closed 

cabinets, closets, and behind curtains.

FIGURE 2: 

OPENING COVER

Separate the cover from the base by inserting a 
flat head screwdriver into the top slot marked 
“OPEN”. Pry the cover forward. 

Attach the base directly to the wall or to a 
standard 2” x 4” junction box using (2) #6-32 x 1” 
screws. 

3.268"

(82.00 mm)

1.205"

(30.60 mm)

4.79"

(121.55 mm)

.984"

(25.00 mm)

• Eliminate and seal all wall and conduit 

penetrations. Air migration from wall 

cavities may alter  readings. 

• Do not install near heat sources. eg: 

lamps, radiators, direct sunlight, 

copiers, chimney walls, walls concealing 

hot-water pipes

Version: 1.0

I0000941

Summary of Contents for PM2.5-ROOM

Page 1: ...set to Auto Mode IMPORTANT PRECAUTIONS This product uses a laser particulate matter sensor It is strictly prohibited to be disassembled It is dangerous if the human body is exposed to the laser directly If the environment exceeds the measurement range for an extended period it may lead to a decrease of the measurement accuracy The performance of the sensor may be decreased due to excessive dust an...

Page 2: ...ansformer IF THE 24 VDC OR 24VAC POWER IS SHARED WITH DEVICES THAT HAVE COILS SUCH AS RELAYS SOLENOIDS OR OTHER INDUCTORS EACH COIL MUST HAVE AN MOV DC AC TRANSORB TRANSIENT VOLTAGE SUPPRESSOR ACI PART 142583 OR DIODE PLACED ACROSS THE COIL OR INDUCTOR THE CATHODE OR BANDED SIDE OF THE DC TRANSORB OR DIODE CONNECTS TO THE POSITIVE SIDE OF THE POWER SUPPLY WITHOUT THESE SNUBBERS COILS PRODUCE VERY ...

Page 3: ... measuring time to extend the service life of the sensor when the dust concentration changes very slightly Use MODE jumper to choose the mode The factory default mode is AUTO Notes P999 Reset Once entered rST is displayed Press button All factory default settings will be restored P161 1 Point Calibration The current value is displayed Press button to increase an offset Press button to decrease an ...

Page 4: ...uires that the last device in a chain have a termination resistor This is controlled using a jumper in the center and right pins 120 Ω position marked on FIGURE 7 When the jumper is set to 120 Ω a 120 Ω resistance is added in parallel to the data line When the jumper is set to left and center pins disabled the resistance is not added By default the jumper is placed in the disabled position ERROR C...

Page 5: ...Menu selection see above for Menu Adjustments The device that requests information is called the Modbus Master and the devices giving the information are Modbus Slaves The Modbus sensors are slave devices and the number of Data Bits needs to be the same as in the Master device configuration ACI s Modbus RTU sensors utilize 8 data bits during communication exchange Parity default setting is NONE St...

Page 6: ...emarks PM series Product code 9070 PM2 5 Value ug m PM10 Value ug m Default slave address 1 RTU 9600 n 8 1 Write 40016 21845 to reset to factory default setting 0 Off 1 Relay activated Below the set point 2 Relay activated Higher than set point 3 Relay activated in the set range 4 Relay activated outside the set range Relay control parameters set Baud rate 9600 default or 4800 Parity 0 NONE 1 ODD ...

Page 7: ...0 reading 100 500 600µg m3 25 C 50 RH 1 μg m3 In continuous service mode sample time 1s response time 10s 15 minutes MTBF more than 3 years in continuous service mode service life up to 8 10 years in auto intermittent service mode Modbus RTU EIA RS 485 1 247 4800 or 9600 None Even Odd 1 8 ScrewTerminal Blocks 16 AWG 1 31 mm2 to 22 AWG 0 33 mm2 0 45 lbf in 0 5 Nm nominal 32 to 122 F 0 to 50 C 30 to...

Page 8: ...nc 2305 Pleasant View Road Middleton WI 53562 Phone 1 888 967 5224 Website workaci com Page 8 Automation Components Inc 2305 Pleasant View Road Middleton WI 53562 Phone 1 888 967 5224 Website workaci com Version 1 0 I0000941 ...

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