SICK 1066320 GTB6-N1211S38 NPN Background Suppression Sensor

Technical Overview

The SICK GTB6-N1211S38 is a photoelectric proximity sensor with background suppression and a single NPN output. Sensing spans 35–140 mm for the specified white, gray and black reference targets; maximum ranges depend on remission, reaching 250 mm on reference white. Its 650 nm red PinPoint LED produces a 6 mm spot at 100 mm. A five-turn mechanical spindle adjusts sensing distance and a separate rotary selector chooses light or dark switching. Response is below 625 µs with resistive load, with 1,000 Hz switching at a 1:1 light/dark ratio. The 10–30 V DC device uses a 1.9 m three-wire PVC cable, ABS/PC housing, PMMA optics and IP67 protection.

NPN background-suppression sensor with 35–140 mm sensing, five-turn range adjustment, selectable light/dark switching and a 1.9 m three-wire PVC cable.

Key Features

Photoelectric proximity sensing with background suppression

35–140 mm sensing on specified white, gray and black reference targets

5–250 mm maximum range on 90% remission reference white

650 nm red PinPoint LED; Ø6 mm spot at 100 mm

Five-turn sensing-range spindle; separate light/dark rotary selector

Single NPN output; ≤100 mA, reduced to 50 mA above 24 V supply

<625 µs response with resistive load; 1,000 Hz at 1:1 light/dark ratio

10–30 V DC; 30 mA without load; 1.9 m three-wire PVC cable

ABS/PC housing; PMMA optics; IP67; M3 mounting holes

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

Technical Specification Matrix

Parameter	Value
Functional principle	Photoelectric proximity sensor with background suppression
Sensing range	35–140 mm on white 90%, gray 18% and black 6% reference targets
Maximum sensing range	5–250 mm on 90% remission reference white (DIN 5033)
Reference-target ranges	Sensing / maximum: white 90% 35–140 / 5–250 mm; gray 18% 35–140 / 7–200 mm; black 6% 35–140 / 10–140 mm
Light source	Visible red PinPoint LED
Wavelength	650 nm
Light spot size	Ø6 mm at 100 mm
LED service life	Average 100,000 h at ambient +25 °C
Adjustment	Sensing-range mechanical spindle, five turns
Switching output	NPN
Switching mode	Light or dark switching, selectable via rotary switch
Signal voltage HIGH/LOW	Approximately supply voltage / ≤3 V
Output current	≤100 mA; maximum 50 mA at supply voltage >24 V
Response time	<625 µs with resistive load
Switching frequency	1,000 Hz at 1:1 light/dark ratio
Power supply	10–30 V DC; limit values in a short-circuit-protected network, maximum 8 A
Ripple	±10%; remain within supply tolerances
Current consumption	30 mA without load
Connection	1.9 m three-wire PVC cable; do not bend below 0 °C
Conductor cross-section	0.14 mm²
Wire assignment	CD-043: BN=L+; BU=M; BK=Q
Circuit protection	A: supply reverse-polarity protection; B: inputs and output reverse-polarity protection; D: outputs overcurrent and short-circuit protection
Protection class	III
Housing material	ABS/PC plastic
Optics material	PMMA plastic
IP rating	IP67
Mounting	M3 mounting holes
Indicators	Green: supply voltage active; yellow: received-light status
Operating temperature	−25 to +55 °C; temperature stability following adjustment ±10 °C
Storage temperature	−40 to +70 °C
UL files	NRKH.E348498 and NRKH7.E348498
Physical Weight (kg)	0.06

Parameter

Value

Functional principle

Photoelectric proximity sensor with background suppression

Sensing range

35–140 mm on white 90%, gray 18% and black 6% reference targets

Maximum sensing range

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

Reference-target ranges

Sensing / maximum: white 90% 35–140 / 5–250 mm; gray 18% 35–140 / 7–200 mm; black 6% 35–140 / 10–140 mm

Light source

Visible red PinPoint LED

Wavelength

650 nm

Light spot size

Ø6 mm at 100 mm

LED service life

Average 100,000 h at ambient +25 °C

Adjustment

Sensing-range mechanical spindle, five turns

Switching output

NPN

Switching mode

Light or dark switching, selectable via rotary switch

Signal voltage HIGH/LOW

Approximately supply voltage / ≤3 V

Output current

≤100 mA; maximum 50 mA at supply voltage >24 V

Response time

<625 µs with resistive load

Switching frequency

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

Power supply

10–30 V DC; limit values in a short-circuit-protected network, maximum 8 A

Ripple

±10%; remain within supply tolerances

Current consumption

30 mA without load

Connection

1.9 m three-wire PVC cable; do not bend below 0 °C

Conductor cross-section

0.14 mm²

Wire assignment

CD-043: BN=L+; BU=M; BK=Q

Circuit protection

A: supply reverse-polarity protection; B: inputs and output reverse-polarity protection; D: outputs overcurrent and short-circuit protection

Protection class

III

Housing material

ABS/PC plastic

Optics material

PMMA plastic

IP rating

IP67

Mounting

M3 mounting holes

Indicators

Green: supply voltage active; yellow: received-light status

Operating temperature

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

Storage temperature

−40 to +70 °C

UL files

NRKH.E348498 and NRKH7.E348498

Physical Weight (kg)

0.06

Industrial Applications

1. Checking a dark insert in an assembly nest

An assembly nest can present a dark insert inside the adjusted target zone while an empty-nest surface lies farther away. The five-turn spindle sets background suppression using representative inserts and empty nests. External inspection logic samples the selected NPN state after the assembly settles, with setup checking actual remission, placement tolerance and the specified black-target sensing range.

Problem Solved

An insert-present reference helps external inspection logic identify an empty assembly position before the next operation, using a target zone adjusted for the actual part and nest.

Insert inspection Background suppression NPN output

2. Counting separated components beside a guide

A parts guide can carry separated opaque components past the red optical sensing point while the machine background remains farther away. The spindle sets the working distance and the selector matches light or dark NPN behavior to an external counter. Commissioning checks component remission, spot coverage, part gaps and transit speed against the response and switching-frequency specifications.

Problem Solved

A component-passage reference helps an external counter register separated parts from one mounting side, using background suppression and timing limits checked for the actual feed.

Parts counting Red optical spot Selectable NPN

3. Confirming a carrier against a transfer stop

A transfer stop can bring a defined opaque carrier surface within the adjusted sensing distance and leave the empty-stop background farther away. External sequencing logic samples the selected NPN signal after the carrier settles. Setup uses actual carriers to establish distance separation, checking seated-position tolerance, surface remission and the reference-target ranges before coordinating acceptance or release.

Problem Solved

A seated-carrier reference helps external sequencing logic coordinate transfer acceptance, using a sensing distance adjusted to distinguish the presented carrier from the empty-stop background.

Carrier arrival Transfer acceptance Range adjustment