GLD20G-QLRC2170ZZZ

Photoelectric Sensor, 20 m, SPDT Relay, Retroreflective, Terminal Block, 21.6 to 253 VDC, G20 Series

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Manufacturer: SICK
Product type:
SVHC: No SVHC (21-Jan-2025)
Product Range: G20 Series
Sensing Method: Retroreflective
Connection Method: Terminal Block
Sensing Range Max: 20m
Sensor Output Type: SPDT Relay
Supply Voltage DC Max: 253V
Supply Voltage DC Min: 21.6V

Delivery and price
Units per pack	50
Price	139.35 €
Current stock	10+
Lead time	30 days

Datasheet

GLD20G-QLRC2170ZZZ G20 

**COMPACT PHOTOELECTRIC SENSORS** 

**GLD20G-QLRC2170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Ordering information 

|**Type**|**Part no.**|
|---|---|
|GLD20G-QLRC2170ZZZ|1119876|
|Other models and accessories<br> www.sick.com/G20<br>>||



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Illustration may differ<br>ckSAL<br>**----- End of picture text -----**<br>


## Detailed technical data 

## Features 

|**Functional principle**|Photoelectric retro-reflective sensor|
|---|---|
|**Functional principle detail**|With minimum distance to reflector (dual lens system)|
|**Sensing range**<br>Sensing range min.<br>Sensing range max.<br>Maximum distance range from reflector to sen-<br>sor (operating reserve 1)<br>Recommended distance range from reflector to<br>sensor (operating reserve 2)<br>Reference reflector|0.03 m<br>20 m<br>0.03 m ... 20 m<br>0.03 m ... 16 m<br>Reflector PL80A|
|**Polarisation filters**|Yes|
|**Emitted beam**<br>Light source<br>Type of light<br>Shape of light spot<br>Light spot size (distance)<br>Maximum dispersion of the emitted beam<br>around the standardized transmission axis<br>(squint angle)|LED<br>Visible red light<br>Rectangular<br>Ø 200 mm (5,000 mm)<br>< +/- 1.5° (at Ta = +23 °C)|
|**Key LED figures**<br>Normative reference<br>LED risk group marking<br>Wave length<br>Average service life|EN 62471:2008-09 | IEC 62471:2006, modified<br>Free group<br>630 nm<br>100,000 h at Ta= +25 °C|
|**Adjustment**<br>Potentiometer|For sensitivity adjustment, 270°|



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**PHOTOELECTRIC SENSORS | SICK** 

**GLD20G-QLRC2170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## **Indication** 

|**Indication**||
|---|---|
|LED green|Operating indicator<br>Static on: power on<br>Static off: object present|
|LED yellow|Status of received light beam<br>Static on: object not present<br>Static off: object present|
|Electrical data||
|**Supply voltage UB**|21.6 V AC/DC ... 253 V AC/DC|
|**Ripple**|< 10 %|
|**Usage category**|DC-13 (according to EN 60947-1)<br>AC-15 (according to EN 60947-1)|
|**Current consumption**|≤ 10 mA, ≤ 45 mA, Without load At 230 V AC/DC, Without load At 24 V AC/DC|
|**Protection class**|II|
|**Digital output**||
|Number|2 (Complementary)|
|Type|Relay, SPDT, electrically isolated1)|
|Output current Imax.|4 A@250 V AC, 4 A@24 VDC, 0.11 A@250 V DCUL: 4 A@250 V AC, general use4 A @ 250 V AC,<br>resistive (NO)3 A @ 250 V AC, resistive (NC)4 A @ 24 V DC, NO, general use3 A @ 24 V DC, NC,<br>general useR300/B300 (NO contacts only)|
|Response time|≤ 15 ms|
|Switching frequency|10 Hz2)|
|**Pin/Wire assignment**||
|BN 1|+ (L+)|
|BU 2|N|
|WH 3|Relay COM|
|BK 4|Relay NC<br>Relay output, light switching, object present → output LOW|
|GY 5|Relay NO<br>Relay output, dark switching, object present → output HIGH|



1) Valid only for devices manufactured before June 18, 2023 with a date code of 2324 or earlier. Suitable arc suppression with inductive or capacitive load. Relay contacts are separated from the supply voltage by a base insulation of 3.2 mm. Depending on the application, additional insulation may be required in the user wiring. 2) With light/dark ratio 1:1. 

## Mechanical data 

|**Housing**|Rectangular|
|---|---|
|**Dimensions (W x H x D)**|23.5 mm x 74.5 mm x 63 mm|
|**Connection**|Terminal connection, 5 terminals|
|**Material**||
|Housing|Plastic, ABS|
|Front screen|Plastic, PMMA|
|**Weight**|Approx. 88 g|
|Ambient data||
|**Enclosure rating**|IP67 (EN 60529)|
|**Ambient operating temperature**|–30 °C ... +60 °C1)|



1) The max. ambient temperature is 50 °C (UL). 

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**GLD20G-QLRC2170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

|**Ambient temperature, storage**|–40 °C ... +70 °C|
|---|---|
|**Typ. Ambient light immunity**|Sunlight: ≤ 20,000 lx|
|**Shock resistance**|30 g, 11 ms (3 positive and 3 negative shocks along X, Y, Z axes, 18 total shocks|
||(EN60068-2-27))|
|**Vibration resistance**|10 Hz ... 1,000 Hz (Amplitude 1 mm, 3 x 30 min (EN60068-2-6))|
|**Air humidity**|35 % ... 95 %, Relative humidity (no condensation)|
|**Electromagnetic compatibility (EMC)**|EN 60947-5-2, EN 61000-6-3|
|**UL File No.**|NRKH.E348498 & NRKH7.E348498|



1) The max. ambient temperature is 50 °C (UL). 

## Classifications 

|**ECLASS 5.0**|27270902|
|---|---|
|**ECLASS 5.1.4**|27270902|
|**ECLASS 6.0**|27270902|
|**ECLASS 6.2**|27270902|
|**ECLASS 7.0**|27270902|
|**ECLASS 8.0**|27270902|
|**ECLASS 8.1**|27270902|
|**ECLASS 9.0**|27270902|
|**ECLASS 10.0**|27270902|
|**ECLASS 11.0**|27270902|
|**ECLASS 12.0**|27270904|
|**ETIM 5.0**|EC002717|
|**ETIM 6.0**|EC002717|
|**ETIM 7.0**|EC002717|
|**ETIM 8.0**|EC002717|
|**UNSPSC 16.0901**|39121528|



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**GLD20G-QLRC2170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Adjustments 

Display and adjustment elements 

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2<br>②   LED yellow<br>**----- End of picture text -----**<br>


Display and adjustment elements 

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**----- Start of picture text -----**<br>
3<br>1 2<br>①   LED green<br>②   LED yellow<br>③   Potentiometer<br>**----- End of picture text -----**<br>


## Connection type 

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5<br>4<br>3<br>2<br>1<br>**----- End of picture text -----**<br>


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## Characteristic curve 

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Operating reserve<br>100<br>RX<br>10<br>FONSUEEEEE 3<br>2<br>1 PACK PIN 1  AENN<br>0 5 10 15 20 25<br>(16.40) (32.81) (49.21) (65.62) (82.02)<br>Distance in m (feet)<br>**----- End of picture text -----**<br>


- ① Reflector PL20A 

- ② Reflector PL50A, P250, PL30A, PL31A, PL40A 

③ Reflector PL80A, C110A, PL100 

## Operating reserve 

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100<br>oe<br>vaaennn<br>2<br>10<br>f-\<br>Po 1<br>1 Pot AN<br>0 2.5 5 7.5 10<br>(8.20) (16.40) (24.61) (32.81)<br>Distance in m (feet)<br>**----- End of picture text -----**<br>


- ① Reflective tape REF-IRF-56 

- ② Diamond Grade reflective tape, 100 mm x 100 mm 

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**GLD20G-QLRC2170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Light spot size 

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Dimensions in mm (inch)<br>400<br>(15.75)<br>200<br>(7.87)<br>0<br>–200<br>(–7.87)<br>–400<br>(–15.75) 0 5 10 15 20<br>(16.40) (32.81) (49.21) (65.62) 5 20<br>Distance in m (feet) (16.40) (65.62)<br>**----- End of picture text -----**<br>


## Sensing range diagram 

|||
|---|---|
|1|Reflector PL20A|
|2|Reflector PL50A, P250, PL30A, PL31A, PL40A|
|3|Reflector PL80A, C110A, PL100|
|A|Sensing range min. in m|
|B|Sensing range max. in m|
|C|Maximum distance range from reflector to sensor (operating reserve 1)|
|D|Recommended distance range from reflector to sensor (operating reserve 2)|
|0<br>2<br>1<br>Distance in m (feet)<br>2.5<br>(8.20)<br>5<br>(16.40)<br>10<br>(32.81)<br>7.5<br>(24.61)<br>D<br>C<br>A<br>B<br>0.2/0.25<br>0.2/0.25<br>5.4/6.0<br>7.5<br>6.5||
|||
|1|Reflective tape REF-IRF-56|
|2|Diamond Grade reflective tape, 100 mm x 100 mm|
|A|Sensing range min. in m|
|B|Sensing range max. in m|
|C|Maximum distance range from reflector to sensor (operating reserve 1)|



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**GLD20G-QLRC2170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

D Recommended distance range from reflector to sensor (operating reserve 2) 

## Dimensional drawing (Dimensions in mm (inch)) 

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63 (2.48)<br>23.5 (0.93) 41.2 (1.62)<br>1<br>+ f L Ws!<br>3<br>2 4<br>1<br>5 (0.20) 4.8 (0.19)<br>|<br>43.2 (1.70)<br>54.8 (2.16)<br>(0.17)<br>Ø 4.3<br>(0.08)<br>2.15<br>(0.81)<br>20.7<br>)<br>) (0.09)<br>2.52( (2.93)<br>0.71( 2.3<br>(1.42) 18  63.9  74.5<br>36.1<br>5.3<br>(0.21)<br>**----- End of picture text -----**<br>


- ① Display and adjustment elements 

- ② Center of optical axis, sender 

- ③ Center of optical axis, receiver 

- ④ Fixing hole ø 4.3 mm, both sides for hexagon nut M4 

## Recommended accessories 

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|||||
|---|---|---|---|
|Other models and accessories|>|www.sick.com/G20|
|Brief description|Type|Part no.|
|Mounting brackets and plates|
|Mounting bracket, Stainless steel V2A (1.4301), 2 screws, 2 nuts, 2 circlips, 2 washers|BEF-W280|5313885|
|for mounting the sensor|
|iil|Universal mounting bracket for reflectors, steel, zinc coated|BEF-WN-REFX|2064574|
|Reflectors|
|Rectangular, screw connection, 84 mm x 84 mm, PMMA/ABS, Screw-on, 2 hole mount-|PL80A|1003865|
|ing|

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**PHOTOELECTRIC SENSORS | SICK** 

## SICK At A GlAnCe 

SICK is one of the leading manufacturers of intelligent sensors and sensor solutions for industrial applications. A unique range of products and services creates the perfect basis for controlling processes securely and efficiently, protecting individuals from accidents and preventing damage to the environment. 

We have extensive experience in a wide range of industries and understand their processes and requirements. With intelligent sensors, we can deliver exactly what our customers need. In application centers in Europe, Asia and North America, system solutions are tested and optimized in accordance with customer specifications. All this makes us a reliable supplier and development partner. 

Comprehensive services complete our offering: SICK lifetime Services provide support throughout the machine life cycle and ensure safety and productivity. 

For us, that is “Sensor Intelligence.” 

## WOrldWIde preSenCe: 

Contacts and other locations www.sick.com 

SICK AG | Waldkirch | Germany | www.sick.com

Updated at March 31, 2026

SICK is a globally recognized leader in factory and logistics automation technology, renowned for engineering advanced sensors and developing innovative digital services. Driven by a commitment to high precision, reliability, and versatility, the company provides the foundational components required to transform traditional manufacturing processes into intelligent, self-optimizing systems that adapt autonomously using real-time data. Our comprehensive selection of SICK products is heavily focused on their industry-leading sensing technologies. We offer a robust portfolio of light sensors designed to deliver exceptional accuracy and performance in demanding industrial environments. Furthermore, our extensive range features high-quality proximity sensors and switches, providing the dependable object detection essential for automated production, packaging, and material handling applications. To ensure seamless integration of these advanced sensor networks, our offering is complemented by specialized connectivity solutions such as SICK fiber optic lead assemblies. From consumer goods and electronics to logistics and automotive manufacturing, SICK delivers the cutting-edge automation technology necessary to maximize operational efficiency and maintain continuous, reliable performance across diverse industrial sectors.

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