G78 PNP PN NO NC Photoelectric Senosr Switch

Description

Throuht-beam type

Through-beam bype photoelectric switch is designed that via the light beam between opposite-mounted transmitter and receiver, the object passing through these two devices will interrupt the light beam and start the receiver. (Fig.R1)

Diffuse type

Diffuse reflection type photoelectric switch integrates the transmitter and the reciver. Light reflected by the photoelectric switch is reflected back to the receiver by the detected object. (Fig.R2)

Retroreflective type

Retroreflective type photoelectric switch also integrates the transmitter and the receiver, Its difference from other models is that reflecotr is used to relfect light to the photoelectric switch. Though the object between the photoelectric switch and reflector can reflect the light, it is much less efficient than the reflector so as to cut down reflected light. (Fig.R3)

Convergence reflection type (condensation type)

The working principle of convergence reflection type photoswitch is similar to that of direct reflection type one, while its projector and light receiver focus on boject distance, only when the object presents to the focus can the photoswitch actuate.(Fig.R4)

Outward appearance code

Overall dimensions
DETECTION DISTANCE				40cm
Diffuse type	DC 10-30 VDC	NPN	NO	G78-3A40NA
			NC	G78-3A40NB
			NO+NC	G78-3A40NC
		PNP	NO	G78-3A40PA
	AC 90-250 VAC		NC	G78-3A40PB
			NO+NC	G78-3A40PC
		SCR Contro Hable Silicon	NO	G78-2A40LA
			NC	G78-2A40LB
		Relay output
DETECTION DISTANCE				2m
Retrotrfilctive	DC 10-30 VDC	NPN	NO	G78-3B2NA
			NC	G78-3B2NB
			NO+NC	G78-3B2NC
		PNP	NO	G78-3B2PA
	AC 90-250 VAC		NC	G78-3B2PB
			NO+NC	G78-3B2PC
		SCR Contro Hable Silicon	NO	G78-2B2LA
			NC	G78-2B2LB
		Relay output
DETECTION DISTANCE				5m
Trough beam	DC 10-30 VDC	NPN	NO	G78-3C5NA
			NC	G78-3C5NB
			NO+NC	G78-3C5NC
		PNP	NO	G78-3C5PA
	AC 90-250 VAC		NC	G78-3C5PB
			NO+NC	G78-3C5PC
		SCR Contro Hable Silicon	NO	G78-2C5LA
			NC	G78-2C5LB
		Relay output
DC/SCR   Control output				DC:200mA/ AC:400mA Relay:3A
DC/AC Consumption current				DC<15mA、AC<10mA
DC/AC Response time				DC<2ms、AC<20ms
Directional angle				3°~-10°
Detected object				Transparent or opaque body
WoJrking envlrOnment temDerature				-25℃~+55℃
Intensity ofillumination of working environment				Sunlight under 10000LX  Incandescent lamp under 3000LX
Shell materia				Plastic
Protection grade				IP54

Application illustration or photoelectric switch