Agrowtek SXW User manual

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1© Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™
Technology to Help You Grow
AGROWtEK
Power 24Vdc, ~5W
Max Cable Distance 1000ft
Aspirator 6cfm Fan with Foam Filter
Temperature Range -20 - 60°C
Temperature Accuracy ±0.2°C typical
±0.4°C maximum
Humidity Range 0-100% RH (non condensing)
Humidity Accuracy ±2% 0-80% typical
±4% maximum
Light Irradiance Range 0 - 1000W/m2
Light Accuracy ±10%
CO2 Range (optional) 0-2,000ppm
CO2 Accuracy ±50ppm +3%
Wind Speed Range 0 - 125 mph
Wind Speed Accuracy ±1mph
Wind Direction Range 0 - 359°
Wind Angle Precision ±1°
4-20mA DAC Resolution 12 bit, 0.005mA
Interface GrowNET, MODBUS
Specications
Shown with optional sensors and mounting kit.
Weather Station Sensor & Data Logger
Contents
Overview 2
Installation Instructions 3
Assemble Mounting Bracket 4
Connecting Wind Sensors 5
Connection to GrowControl™ GCX 6
GrowNET™ Hubs 6
Connection to USB AgrowLINK 7
INSTRUCTION MANUAL
SXW
Connection to MODBUS RTU 7
Supported Commands 8
Register Types 8
Sensor Value Registers 8
Toggle Units Register 8
Calibration Registers 8
MODBUS Holding Registers 9
Maintenance & Service 10
Fan Filter 10
CO2 ppm Sensor Upgrade 10
Storage and Disposal 11
Warranty 11

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SXW Weather sensors are designed for monitoring outdoor weather conditions in greenhouse control and
other monitoring or control applications. SXW sensors feature temperature, relative humidity and light sen-
sors standard, with options for CO2, rain, wind speed and wind direction.
An optional mounting bracket kit allows the mounting of all sensors to a single 1”PVC or EMT conduit pole.
Overview
4
3
2
1
6
5
7
SXW System Components
1. SXW Weather Sensor Base weather station for temperature, humidity and light.
2. SXR Rain Sensor Optical rain sensor (optional.)
3. Wind Anemometer Wind speed sensor (optional.)
4. Wind Vane Wind direction sensor (optional.)
5. Mounting Bracket Kit Stainless steel pole mounting bracket with clamps.
6. PVC Conduit 8” PVC conduit riser (included with mounting bracket kit.)
7. 1” Pole PVC or Conduit pole for mounting (provided by customer.)

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The SXW weather station is made of corrosion-resistant powder-coated aluminum enclosure and is intended
for mounting outdoors on a conduit pole. A 7/8”hole is provided in the bottom of the sensor for installing a
1/2” EMT conduit tting.
Install the sensor box in a vertical orientation with the openings facing down. The top of the box is rain proof
when oriented properly.
IMPORTANT: The cover screws are stainless steel and provided with a sealing washer under the head.
Do not substitute screws; contact Agrowtek for replacements.
Installation Instructions
1
3
4
2
SXW Features
1. Intake Fan Fan and lter assembly for pushing air into the sensor enclosure.
2. Exhaust Fan Fan and lter assembly for pulling air out of the sensor enclosure.
3. Light Sensor Ambient light sensor.
4. SXR Rain Sensor Optical rain sensor (optional.)

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Assemble Mounting Bracket
Optional stainless steel pole mounting bracket allows all weather station components to be mounted on a
single pole for simple installation. It is recommended to mount the base of the pole on a hinge point so that
the sensor array can be tipped down to ground elevation for service without a ladder.
1
4
3
2
2
1
1
2
3
Install Wind Sensors
1. Insert direction vane and anemometer brackets
into slots located in the top of the bracket (2).
2. Using the provided screw and nut kit, fasten the
wind sensors to the bracket through the holes in
the brackets.
3. Route wires through the grommet in the top of
the mounting bracket.
Install SXW Sensor
1. Remove the top cover from the SXW sensor and
locate the 7/8”diameter hole in the bottom of the
enclosure.
2. Assemble the stand-o pipe (1) through the
hole and secure with included EMT nut (2).
Note: hand tighten nut, then turn pipe to tighten.
Note: circuit board may be removed temorarily to
increase access to the nut if required.
3. Install pipe and sensor assembly into bracket
mounting hole (3) and secure with EMT nut.
4. Route RJ-45 cable from sensor circuit board
through stand-o pipe.
5. Route wind sensor cables into sensor through
stand-o pipe (1). Keep cables under protective
cover (4) area to shield from sun and rain.
Mount on Pole
1-3/8” diameter clamps for 1” conduit or PVC pipe clamps secure with nuts on the back side of the bracket.
Route the RJ-45 GrowNET™ cable through the pole to shield it from weather.

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Connecting Wind Sensors
Wind speed (anemometer) and direction vane sensors are available for connection to the weather station for
collection of wind data. Wind sensors connect to the terminal blocks inside of the sensor box and are mount-
ed externally. RJ-45 connector is provided for power & data to GrowControl™ controllers and interfaces.
Wire wind sensors according to the diagram below:
Do NOT connect the GrowNET™ port to Ethernet networks.
Disconnect power while making connections to prevent damage to any components.
RED
WHT
BLK
RED
BLK
BLK RED
WIRING DIAGRAM
OUT
V+
GND
5V
24V
0V
1
2
3
4
Internal Components
1. Connection Terminals Terminals for connecting rain and wind sensors.
2. Analog Connection 4-20mA output connection (optional, shown) or DC input jack.
3. GrowNET™ Port RJ-45 jack for GrowNET™ power/communication.
4. CO2 Sensor Optional NDIR CO2 ppm sensor.

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GrowNET™ Hubs
All GrowNET™ devices are connected using standard CAT5 Ethernet cable with RJ-45 connections.
Devices can be connected directly to the GrowNET™ ports on the bottom of the controller, or through HX8
GrowNET™ hubs. It is typical to simplify cabling by locating hubs centrally in hall ways and rooms allowing
single runs from an 8-port device hub back to a central hub or back to the controller.
HX8 GrowNET ™ hubs expand a single port into eight more ports.
Hubs can be daisy-chained to form a network of up to 100 devices per
GrowNET™ bus. Individually buered port transcievers provide excellent
signal integrity and extended communication strength and range.
Hubs provide up to 1A of power for operating sensors and most relays
directly over the CAT5 cable. A DC jack on the hub provides 24Vdc power
to the ports from the included wall power supply. A terminal block
power option is also available.
DIELECTRIC GREASE
Dielectric grease is recommended on RJ-45 GrowNET™ connections when used in humid environments.
Place a small amount of grease onto the RJ-45 plug contacts before inserting into the GrowNET™ port.
Non-conductive grease is designed to prevent corrosion from moisture in electrical connectors.
• Loctite LB 8423 • Dupont Molykote 4/5 • CRC 05105 Di-Electric Grease
• Super Lube 91016 Silicone Dielectric Grease • Other Silicone or Lithium based insulating grease
NOTICE
GrowNET™ ports use standard RJ-45 connections but are NOT compatible the Ethernet network equipment.
Do not connect GrowNET™ ports to Ethernet ports or network switch gear.
Installation Notes
Refer to the GCX controller manual for details on adding the device to the system.
Connection to GrowControl™ GCX

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Connection to MODBUS RTU
RS-485
Use the LX2 ModLINK to connect MODBUS devices to the GrowNET™ port.
MODBUS Manual
See MODBUS manual for more information.
RJ45 CABLE
7 - 24 Vdc
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AGROWtEK
U.S.A.
MADEIN
©Arowtek Inc. | www.agrowtek.com
GrowNET
Link Port
MODBUS
TM Digital WaterSensor
Logger & Controller
TEMPERATURE CONDUCTIVITYpH O.R.P./ D.O.
GrowControl
TM
pH
Probe
o.r.p./d.o.
Probe
Temp Probe | EC Probe
red blk wht | clr red blk
GPH MNUH/L
72.0
45.2
123
455
°F
%
W/m
ppm
2
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AGROWtEK
GrowControl
TM
SXE
Environment Sensor
Data Logger
U.S.A.
MADEIN
© Agrowtek Inc.
www.agrowtek.com
WiFi
optional
GrowNET
Link Port
MDOBUSRTU
TM
WiFi
Reset
24Vdc in
4-20mA out
KEEP
FAN
FILTER
CLEAN
GPH MNUH/L
72.0
45.2
123
455
°F
%
W/m
ppm
2
Technology to Help You Grow
AGROWtEK
©2016 Agrowtek Inc. | www.agrowtek.com
RD8
Equipment Control Interface
U.S.A.
MADEIN
DANGER!Risk of electric shock.
Disconnectall power sources before opening cover.
Readmanual before installing or operating.
WiFi
Antenna
Programmable Smart Relays for Automation Control
1 2 3 4 5 6 7 8
AgrowNET
Link Port
TM
STATUS INDICATORS
GrowNET™ Devices
3.3/5Vdc Serial Bus Compatible.
Include required bus terminating resistors per EIA standard.
TX/RX+
TX/RX-
PLC
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U.S.A.
MADE IN
www.agrowtek.com
GrowNET
Device/Hub
TM
ModLINK TM
LX2 MODBUS RTU Bridge
+7-24Vdc GND A B
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AGROWtEK
U.S.A.
MADEIN
© Agrowtek Inc. | www.agrowtek.com
GrowNET™8-Port Hub
GrowControl™
1 2 3 4
8 7 6 5
12-24Vdc
GrowNET
Upstream
Port
TM
HX8
power
RS-485
LX1 USB AgrowLINK connects Agrowtek’s devices to a computer’s USB port for:
Connection to USB AgrowLINK
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U.S.A.
MADE IN www.agrowtek.com
GrowNET
Device/Hub
TM
USB
AgrowLINKTM
LX1 USB to GrowNET™ Bridge
TX
RX
• Firmware Updates
• Calibration
• Conguration
• Data Logging Download
• More
Visit www.agrowtek.com for free software applications.
Standard FTDI drivers automatically install in Windows. GrowNET protocol available for custom software ap-
plications; sample C# code available. See software manual for more information.

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Sensor # Type Integer Scale Range
1 Temperature x100 -2000 - 6000 (-20 - 60°C) / -400 - 14000 (-4 - 140°F)
2 Humidity x10 0 - 1000 (0 - 100%)
3 Light x1 0 - 1000 W/m2
4CO2 x1 0 - 10,000 ppm
5 Speed x1 0 - 125mph
6 Direction x1 0 - 359°
7 Barometric Pressure NOT CURRENTLY AVAILABLE
8 Rain 0 - 1
Sensors with alternate units may toggle the units using the“toggle units”register. To toggle the units, send
the sensor channel number to to the toggle register. This register is write-only.
For example: to toggle between °F and °C, send a “1” to register 1002.
Sensor values are available in integer or oating point formats depending on the register requested
(see map.)
Sensor Value Registers
0x03 Read Multiple Registers
0x06 Write Single Register
A request to use a function that is not available will return an illegal function exception.
Supported Commands
Data registers are 16 bits wide with addresses using the standard MODICON protocol. Floating point values
use the standard IEEE 32-bit format occupying two contiguous 16 bit registers. ASCII values are stored with
two characters (bytes) per register in hexadecimal format.
Register Types
Toggle Units Register
For example: an integer temperature value of 2417 is equal to a temperature reading of 24.17°C.
The value“9999” is representative of a failed sensor (with the exception of CO2 which will read 0.)
Calibration registers are 16-bit signed integers for the purpose of calibrating the sensor values or analog out-
put channels. Calibration may be achieved by writing the desired calibrated value to the associated register.
Writing to the calibration registers automatically invokes the calibration routine for that register.
Oset Calibration
Oset, or zero calibration, is an arithmatic positive or negative correction to the sensor reading and is the
only type of sensor calibration available on climate/environmental sensors.
To perform a sensor oset calibration, simply write the corrected sensor value to the oset calibration reg-
siter (taking into account the integer scale as shown above.)
Calibration Registers

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For example: to set the temperature to a calibrated value of 25°C, write the value “2500.”
Analog Calibration (±1 calibration bit = ±0.005mA adjustment)
Analog output calibration sends a positive or negative oset to the respective output channel’s digital to
analog converter (DAC.) The DAC has a resolution of 0.005mA/bit.
For example: to shift the analog output up by 0.1mA, set the analog oest value to +20. ( 0.1 / 0.005 = 20)
MODBUS Holding Registers
Parameter Description Range Type Access Address
Address Device Slave Address 1 - 247 8 bit R/W 40001
Serial# Device Serial Number ASCII 8 char R 40004
DOM Date of Manufacture ASCII 8 char R 40008
HW Version Hardware Version ASCII 8 char R 40012
FW Version Firmware Version ASCII 8 char R 40016
Toggle Units Toggle sensor units 1 - 4 16 bit, unsigned W 41002
Sensor Reading,
Integer
Temperature -2000 - 6000 (-20 - 60°C)
16 bit, signed R
40101
Humidity 0 - 1000 (0 - 100%) 40102
Light 0 - 1000 W/m2 40103
CO2 0 - 10,000ppm 40104
Speed 0 - 125mph 40105
Direction 0 - 359° 40106
Barometric Pressure N/A 40107
Rain 0 - 1 40108
Sensor Reading,
Float
Temperature -20.00- 60.00 °C
32 bit, oating pt R
40201
Humidity 0 - 100.0 % 40203
Light 0 - 1000 W/m2 40205
CO2 0 - 10,000ppm 40207
Speed 0 - 125mph 40208
Direction 0 - 359° 40211
Barometric Pressure N/A 40213
Calibration Input,
Oset (Zero)
Temperature
See integer ranges above. 16 bit, signed W
41101
Humidity 41102
Light 41103
CO2 41104
Speed 41105
Direction 41106
Barometric Pressure 41107
Calibration Input,
Analog Output
Temperature
-255 - 255 (bits) 16 bit, signed W
41301
Humidity 41302
Light 41303
CO2 41304
A request to read or write a register that is not available will return an illegal address exception.

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Maintenance & Service
Sensors require periodic maintenance to ensure proper performance.
The fan air lter should be periodically removed for cleaning.
It is NOT necessary to remove the fan.
1. Pry the retaining grate out using a small at blade eye-glass
screwdriver or tip of a pocket knife.
2. Remove the foam lter and replace, or clean with mild dish
detergent and water, then pat dry.
3. Re-install the foam lter and grate by gently snapping the
grate back into place.
Fan Filter
CO2 ppm Sensor Upgrade
The SXW sensor may be upgrade to sense and control CO2 ppm with a precision NDIR type CO2 sensor.
4 PINS
5 PINS
1. Disconnect RJ-45 GrowNET™ and any power cables
from the sensor.
2. Remove the four cover screws and lift o the cover.
Note the orientation of the light sensor on the cover.
3. Locate the CO2 headers on the circuit board.
4. Position and install the CO2 sensor module ensuring
the sensor is oriented with the correct pin headers.
One header is 4-pins and the other is 5-pins.
WARNING: Installing the sensor backwards will
damage the CO2 module.
7. Re-install the top cover and re-connect cables.
8. Check to ensure the CO2 reading is now working.

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Storage and Disposal
Storage
Store equipment in a clean, dry environment with ambient temperature between10-50°C.
Disposal
This indsutrial control equipment may contain traces of lead or other metals and environmental contami-
nants and must not be discarded as unsorted municipal waste, but must be collected separately for the
purpose of treatment, recovery and environmentally sound disposal. Wash hands after handling internal
components or PCB’s.
Agrowtek Inc. warrants that all manufactured products are, to the best of its knowledge, free of defective
material and workmanship and warrants this product for 1 year from the date of purchase. This warranty
is extended to the original purchaser from the date of receipt. This warranty does not cover damages from
abuse, accidental breakage, or units that have been modied, altered, or installed in a manner other than
that which is specied in the installation instructions. Agrowtek Inc. must be contacted prior to return ship-
ment for a return authorization. No returns will be accepted without a return authorization. This warranty
is applicable only to products that have been properly stored, installed, and maintained per the installation
and operation manual and used for their intended purpose. This limited warranty does not cover products
installed in or operated under unusual conditions or environments including, but not limited to, high hu-
midity or high temperature conditions. The products which have been claimed and comply with the afore-
mentioned restrictions shall be replaced or repaired at the sole discretion of the Agrowtek Inc. at no charge.
This warranty is provided in lieu of all other warranty provisions, express or implied. It is including but not
limited to any implied warranty of tness or merchantability for a particular purpose and is limited to the
Warranty Period. In no event or circumstance shall Agrowtek Inc. be liable to any third party or the claimant
for damages in excess of the price paid for the product, or for any loss of use, inconvenience, commercial
loss, loss of time, lost prots or savings or any other incidental, consequential or special damages arising out
of the use of, or inability to use, the product. This disclaimer is made to the fullest extent allowed by law or
regulation and is specically made to specify that the liability of Agrowtek Inc. under this limited warranty,
or any claimed extension thereof, shall be to replace or repair the Product or refund the price paid for the
Product.
Warranty