FFD-GD03A

一. Summary

Photoelectric switch is a photoelectric switch developed according to the specific needs of elevator industry. It is mainly used to obtain elevator well signal, such as gate signal, flat layer signal, speed change signal and end station signal. Widely used in elevator control and elevator monitoring. The photoelectric switch can also be used in other industrial fields.

二. Use of work instructions

1、 According to the corresponding wiring: red / brown-power positive or negative; yellow / blue-power positive or negative; green / black-output.

2、 Check that the action of the indicator lamp is normal.

3、During the work of this product, the green indicator light is on and the output level is high (24 V). When blocking the light path with a non-transparent object, the red indicator light is converted to output low level (0 V). A normally closed photoelectric switch lights a red indicator when there is no object blocking the light path and outputs a low level (0 V). When blocking the light path with a non-transparent object, it is converted into a green indicator light and outputs a high level (24 V). (often on or off can be replaced by changing the polarity of the positive and negative poles of the power supply, the upgraded version is no blocking red light, blocking red light out).

三. Technical parameters

Detection distance	30 mm slot width
30 mm slot width	^{Φ4mm Above non-transparent}
Minimum detection object	^{φ2mm Above non-transparent}
Power supply voltage（VS）	DC12-30V
Protection circuit	Output short circuit protection, overcurrent protection, overheating protection
Control output	Output voltage ≤^{VS-1, output current ≤200 mA, power supply polarity}^{can be changed}
Response time	Action, reset: below 1 ms each
ambient temperature	At work, save :-20-70℃
At work, save :-20-70℃	Work time :35-85%; save time :35-95%(no condensation)
Protection level	IP-64`
Connection mode	Conductor lead type, conductor length 120 CM

四. Output loop

图片49.png

Note: the output polarity can be changed by changing the positive and negative polarity of the access power supply!

五． Working principle：

The photoelectric switch adopts high quality infrared transmitter and infrared receiver, as well as corresponding oscillation circuit and receiving drive circuit. The oscillating circuit produces high frequency oscillation wave with fixed frequency and drives the infrared transmitting circuit to send out high frequency infrared pulse. This process is called transmitting wave modulation. The receiving circuit receives infrared pulse wave and drives the corresponding driving circuit to drive the external load. This process is called infrared demodulation. When the transmitting circuit and the receiving circuit are blocked, the receiving circuit can not receive the infrared high frequency pulse wave, resulting in the level flip, so that the level of the driving external circuit changes, thus detecting that the optical circuit is blocked!

六. Logical Relation and Connection Comparison Table

Logical relations	Wiring
Often on (shading output high level)	Red/brown/negative (-)	Red/brown - positive ()（OUT）	Yellow/blue - positive（+）
normally closed (shading output low level)	Red/brown - positive （+）	Green/Black - Output（OUT）	Yellow / Blue - Negative（-）

七.Appearance Size Chart

八. Notes

1、 The output line is not directly connected to the high or low level, can drive the load directly, to connect the positive or negative electrode of the power supply after the series load,

2、 Pay attention to the cleaning of transmitting and receiving port holes, no opaque objects.

Product Show

Photoelectric switch

FFD-GD03A