TREND WS-R User Manual

Installation Instructions

WS/R

Rain Detector

Important: Retain these instructions

INSTALLATION

Mount the sensor in position. The location should provide safe access for maintenance and a suitable operating environment.

(1) Mount the sensor on a permanent structure using

2 off 20 mm (0.79”) spacer bar saddles, available
from RS Components (608-121) as shown below.
Note that the sensing area should be mounted at
an angle of 30° to 40° to enable surface moisture
to run off.

Connect the sensor’s output to the IQ controller.

(2) Wire the sensor output (yellow) to an analogue

voltage input of the required IQ controller as
shown.

Connect the sensor’s power supply.

(3) Connect the sensor to the IQ controller’s 24 V

auxiliary supply using the red and blue leads as
shown.

Do not cover, allow air circulation.
Do not operate outside the ambient temperature range
(-25 °C to +55 °C) (-13 °F to +131 °F).
Do not store outside the ambient temperature range
(-25 °C to +55 °C) (-13 °F to +131 °F).

Sensor at 30° to 40° angle

WS/R

Signal and supply 0 V linked internally

WS/R

signal

Y

Gn

X
supply

R

Blue

no connection

Spacer bar saddles

no connection

IQ1xx, IQ2xx

IN
0V
+24Vdc

0V

Input

Channel

linked for

Voltage

(V)

IQ3

Y

Gn

R

Blue

Signal and supply 0 V linked internally

For details about particular IQ Controller auxiliary supplies see the appropriate controller data sheet.

Note that the nominal sensor supply is 9 to 12 Vdc, but the sensor is fully functional with a 24 Vdc supply.

WS/R Rain Detector Installation Instructions TG102665 Issue 2/D 13/03/07

signal

X

supply

0 (0V)
N (in)
+ (24V)

1

WS/R Installation Instructions

Connect the sensor’s heater supply.

(4) Connect the sensor to the IQ controller’s 24 V

auxiliary supply, or an external 12 V power
supply using the black and white leads as shown
below.

WS/R powered from IQ controller

Black

100R 24 Vdc

WS/R

White

5W

0 V

IQ Controller
auxiliary supply

WS/R powered from external 12 V supply

Black

WS/R

White

12 V

0 V

12 V External
supply

When powering the sensor’s heater from an IQ controller’s 24 V auxiliary supply it is necessary to connect a 100 Ω, 5 Ω resistor
in series with the sensor.

Note that if both the sensor’s power, and heater supply are from an IQ controller’s 24 V auxiliary supply, ensure that enough current
is available (125 mA approx.).

It is now necessary to configure the IQ controller to decode the signal from the sensor.

(5) Using a Trend configuration program configure

the controller to contain the strategy shown
below:

Sensor output:

0 V no rain
1 V rain present

K

V = 5 0

X

S

X + 1

F

E

D

F

C O M P

0 = No rain detected
1 = Rain detected

IQ Scaling

It is recommended to use SET (Software Tool) for the setting of sensor type modules. For all IQ2 series controllers with firmware
of version 2.1 or greater, or IQ3 series controllers the following SET Unique Sensor Reference should be used:

Rain Detector V

Alternatively select sensor type module scaling mode 5, (characterise) and enter scaling manually as defined in the table below.
For all other IQ controllers see the Sensor Scaling Reference Card, TB100521A.

YEULPI1I2O1O

04 00011-20010 0001

2

volts, V

DISPOSAL

WEEE Directive :

At the end of their useful life the packaging and
product should be disposed of by a suitable

Do not dispose of with normal household waste.
Do not burn.

Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route
du Bois 37,Switzerland by its Authorized Representative.

recycling centre.

Trend Control Systems Limited reserves the right to revise this publication from time to time and make changes to the content
hereof without obligation to notify any person of such revisions or changes.

Trend Control Systems Limited

P.O. Box 34, Horsham, West Sussex, RH12 2YF, UK. Tel:[phone] Fax:[phone] www.trend-controls.com

Trend Control Systems USA

6670 185th Avenue NE, Redmond, Washington 98052, USA. Tel: [phone], Fax: [phone] www.trend-controls.com

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WS/R Rain Detector Installation Instructions TG102665 Issue 2/D 13/03/07