Digital Indicator with Alarm

Feature

■ This digital indicator is designed to be used with Wind Speed and Direction Sensor W639-ED1 (Cat. No. 7910-00).

It receives the signals from the sensor and displays instantaneous and mean values of wind speed in digital and one of 16 points of compass for wind direction on an LED panel. Alarms can be set at your will and is output as a relay contact, hazard lamp, and a buzzer. Furthermore, analog and digital output to external devices by RS-422 communication is available on inquiry.

■ The sensor adopts a brushless potentiometer for wind direction and an optical pulse sensor for wind speed to realize high reliability.

■ Wind direction is indicated as a lamp of one of 16 cardinal directions, and wind speed (instantaneous and mean) is indicated as digital figures.

■ Three step of alarm can be set. When the measured value reaches the threshold all of the relay contact, hazard lamp, and buzzer are activated.

Available range of wind speed alarm	5 to 90 m/s either instantaneous or mean speed
Available range of wind direction alarm	Specify two angles from 0 to 359° either instantaneous or mean direction
Content of first wind speed alarm	Dry contact (contact capacity 24VDC, 1A), slow blinking of green LED, slow intermittent buzzer
Content of second wind speed alarm	Dry contact (contact capacity 24VDC, 1A), quick blinking of yellow LED, quick intermittent buzzer
Content of third wind speed alarm	Dry contact (contact capacity 24VDC, 1A), lighting of red LED, continuous buzzer
Content of wind direction alarm	Dry contact (contact capacity 24VDC, 1A), blinking of LED of the appropriate cardinal direction * Wind direction alarm is output from the third alarm terminal so it cannot be set with third wind speed alarm together.

Description

■ Analog output option available on inquiry

Number of channels: 2 channels

Output content:

Ch1: instantaneous or mean wind speed 0–1VDC for 0–(10–90*)m/s

Ch2: instantaneous or mean wind direction 0–1VDC for 0–360 (or 540*)°

* Content and ranges can be specified to order

* Output impedance less than 500Ω

■ Digital output option available on inquiry

Number of channels: 1 channel

Protocol: RS-422

Output content: instantaneous wind speed/direction, mean wind speed/direction, max./min. instantaneous wind speed, max./min. mean wind speed, operation status, monitored status of power source

Transmission interval: 0.25, 0.5, 1, 5, or 10 seconds

Specifications

Cat. No.		7910-50
Product name		Digital Indicator with Alarm
Model name		WVAT6D0-3-00
Connectable device		Wind Speed and Direction Sensor W639-ED1 (Cat. No. 7910-00, -10)
Input signals	Wind direction	0–1VDC for 0–360°
	Wind speed	pulses (60 pulses per rotation of propeller)
Indication	W.D.	Instantaneous or 10-min. mean value switched by a key, one of 16 cardinal point LED is lit
	W.S.	Instantaneous and 10-min. mean values on 7-segment 4-digit LED
Display range	W.D.	0 to 360°, 16 cardinal points indicated
	W.S.	0.00 to 99.9 m/s
Sampling time		1 second
Alarm range	W.D.	Specify two angles from 0 to 359° either instantaneous or mean direction
	W.S.	5 to 90 m/s either instantaneous or mean speed
Alarm appearance	W.D.	Dry contact (contact capacity 24VDC, 1A), blinking of LED of the appropriate cardinal direction * Wind direction alarm is output from the third alarm terminal so it cannot be set with third wind speed alarm together.
	First W.S.	Dry contact (contact capacity 24VDC, 1A), slow blinking of green LED, slow intermittent beeping
	Second W.S.	Dry contact (contact capacity 24VDC, 1A), quick blinking of yellow LED, quick intermittent beeping
	Third W.S.	Dry contact (contact capacity 24VDC, 1A), lighting of red LED, continuous beeping
Alarm duration		Contact, LED: until the value gets under or out of the set threshold Beeps: until the key is pressed
Operation ambient		0 to 50°C, less than 90%rh without condensing
Max. distance from sensor		500 m if CVVS 1.25 mm2 cable is used
Material		Stainless steel
Power		100 or 240 VAC ±10%, 20 VA Other voltage is available
Dimensions		200 (W) x 110 (H) x 200 (D) mm
Weight		3.5 kg