SICK 1052440 GTB6-P1211 PNP BGS Photoelectric Sensor

Technical Overview

The SICK GTB6-P1211 is a compact photoelectric proximity sensor with background suppression and an PNP switching output. Its visible red PinPoint LED produces a 6 mm light spot at 100 mm, supporting alignment to the intended target while background suppression limits responses from more distant surfaces. The specified sensing range is 35–140 mm; the maximum range of 5–250 mm applies to a white target with 90% remission. Five-turn mechanical adjustment and selectable light/dark switching adapt the detection point and signal logic to the machine. A 2 m cable, 10–30 V DC supply and IP67 ABS/PC housing support installation at compact automation stations.

PNP background-suppression sensor with 35–140 mm sensing range, 1,000 Hz switching, 2 m cable and IP67 housing.

Key Features

Photoelectric proximity sensor with background suppression with PNP switching output

PinPoint LED with 650 nm visible red light

Sensing range: 35–140 mm

Light spot: Ø 6 mm at 100 mm

Sensitivity adjustment: Mechanical spindle, 5 turns

Selectable light/dark switching

Response < 625 µs; switching frequency 1,000 Hz

10–30 V DC operation with protected switching output

2 m PVC cable; IP67 ABS/PC housing

M3 mounting holes and supply/received-light LED indicators

Technical Specification Matrix

Parameter	Value
Functional principle	Photoelectric proximity sensor with background suppression
Sensing range	35–140 mm
Maximum sensing range	5–250 mm on 90% remission white target (DIN 5033)
Light source	PinPoint LED, visible red light
Wavelength	650 nm
Light spot size	Ø 6 mm at 100 mm
Adjustment	Mechanical spindle, 5 turns
Power supply	10–30 V DC; short-circuit-protected network, max. 8 A
Residual ripple	±10%; remain within supply-voltage limits
Current consumption	30 mA, without load
Protection class	III
Switching output	PNP
Switching mode	Light/dark switching; selectable via rotary selector
Output current	≤ 100 mA; maximum 50 mA above 24 V supply
Response time	< 625 µs with resistive load
Switching frequency	1,000 Hz at light/dark ratio 1:1
Circuit protection	Supply and input/output reverse-polarity protection; output overcurrent and short-circuit protection
Housing form	Rectangular
Connection	3-wire, 2 m cable; brown L+, blue M, black Q
Conductor cross-section	0.14 mm²
Housing material	ABS/PC plastic
Front screen material	PMMA plastic
Cable material	PVC plastic; do not bend below 0 °C
IP rating	IP67
Operating temperature	−25 to +55 °C; temperature stability after adjustment ±10 °C
Storage temperature	−40 to +70 °C
Mounting	M3 mounting holes
Indicators	Green supply-voltage LED; yellow received-light indicator
Output signal voltage	Supply voltage minus ≤ 3 V / approximately 0 V (HIGH/LOW)
Physical Weight (kg)	0.06
Dimensions L x W x H (cm)	2.1 x 1.2 x 3.15
MTTFD	1,886 years

Parameter

Value

Functional principle

Photoelectric proximity sensor with background suppression

Sensing range

35–140 mm

Maximum sensing range

5–250 mm on 90% remission white target (DIN 5033)

Light source

PinPoint LED, visible red light

Wavelength

650 nm

Light spot size

Ø 6 mm at 100 mm

Adjustment

Mechanical spindle, 5 turns

Power supply

10–30 V DC; short-circuit-protected network, max. 8 A

Residual ripple

±10%; remain within supply-voltage limits

Current consumption

30 mA, without load

Protection class

III

Switching output

PNP

Switching mode

Light/dark switching; selectable via rotary selector

Output current

≤ 100 mA; maximum 50 mA above 24 V supply

Response time

< 625 µs with resistive load

Switching frequency

1,000 Hz at light/dark ratio 1:1

Circuit protection

Supply and input/output reverse-polarity protection; output overcurrent and short-circuit protection

Housing form

Rectangular

Connection

3-wire, 2 m cable; brown L+, blue M, black Q

Conductor cross-section

0.14 mm²

Housing material

ABS/PC plastic

Front screen material

PMMA plastic

Cable material

PVC plastic; do not bend below 0 °C

IP rating

IP67

Operating temperature

−25 to +55 °C; temperature stability after adjustment ±10 °C

Storage temperature

−40 to +70 °C

Mounting

M3 mounting holes

Indicators

Green supply-voltage LED; yellow received-light indicator

Output signal voltage

Supply voltage minus ≤ 3 V / approximately 0 V (HIGH/LOW)

Physical Weight (kg)

0.06

Dimensions L x W x H (cm)

2.1 x 1.2 x 3.15

MTTFD

1,886 years

Industrial Applications

1. Workpiece detection in front of a machine frame

An assembly fixture must detect an opaque workpiece without responding to a structure farther behind it. Background suppression separates the intended near target from more distant surfaces within the documented operating geometry. The 35–140 mm sensing range and five-turn adjustment support a defined detection position, while the PNP output supplies the workpiece signal to the controller.

Problem Solved

Distance-based background rejection reduces unwanted detections from the machine structure behind the fixture, giving the sequence controller a clearer indication that the intended workpiece occupies the sensing point.

Background suppression 35–140 mm PNP

2. Counting separated components on a conveyor

A narrow conveyor carrying separated components needs a switching event at each passing part. The sensor directs a red spot of approximately 6 mm diameter at 100 mm toward the detection point. Background suppression helps distinguish the raised components from a more distant belt surface, and the 1,000 Hz switching frequency supports repeated transitions within the specified operating limits.

Problem Solved

A defined optical spot and background rejection help isolate component passages from the belt behind them, supporting repeatable count events without mechanical contact with the moving parts.

Ø 6 mm at 100 mm 1,000 Hz Background suppression

3. Checking tray seating before a handling cycle

A handling station can direct the sensor toward the expected edge of a seated opaque tray. The short sensing range establishes a local presence check, while background suppression limits responses from surfaces farther away when the tray is absent. The response below 625 µs supplies a prompt input transition, and selectable light/dark switching fits the machine sequence logic.

Problem Solved

A contactless tray-position signal helps the controller distinguish an occupied pickup location from an empty station, supporting coordinated handling without a mechanical feeler at the tray edge.

< 625 µs Light/dark switching Short-range detection