EX ST IO-Link – explosion-proof LED signal tower with intelligent IO-Link function
The EX ST IO-Link LED signal tower combines maximum safety with cutting-edge communication technology. Designed for use in hazardous areas of Zones 1, 2, 21, and 22, it enables smart process monitoring and flexible control thanks to IO-Link integration—ideal for status indication, fault signaling, as well as level and temperature visualization in environments where ATEX-certified explosion protection is mandatory.
With its robust construction and advanced IO-Link technology, the EX ST IO-Link provides reliable real-time signaling and can be programmed directly via the control system. This makes it the perfect solution for demanding industrial applications in petrochemical plants, refineries, wastewater facilities, shipbuilding, tank and filling stations, and chemical production sites.
Your benefits at a glance
- ATEX-certified for use in Zones 1, 2, 21 & 22
- IO-Link functionality for real-time monitoring and easy parameterization
- Up to 20 individually programmable segments
- 21 selectable colors and 10 light patterns for clear status indication
- Dimming function from 0–100 % in 10 % increments
- Flexible division into 1 to 5 signal levels
- Robust aluminum die-cast housing and impact-resistant borosilicate glass
- IP66 protection – dustproof and protected against powerful water jets
- Operating temperature range from -20 to +50 °C for versatile use in harsh environments
Technical specifications
- Light source: LED modules, up to 20 segments
- Colors & patterns: 21 colors, 10 light patterns (30–120 Hz/min)
- Dimming: 0–100 % in 10 % increments
- Voltage: 24 V DC (0.2 A)
- Protection rating: IP66
- Impact resistance: 7 Joules
- Housing: Aluminum die-cast body with borosilicate glass tube
- Temperature range: -20 °C to +50 °C
- Connection: Delivered ready for connection with one M20 cable gland blanking plug
and one M20 Ex-d cable gland 6.5-14 mm. Multiple signal towers can be connected in series.
The EX ST IO-Link offers a future-proof combination of maximum safety, flexible signaling technology, and intelligent process communication. It increases plant efficiency, minimizes downtime, and meets the highest standards of explosion protection.
| Voltage | 24V |
| Illuminant IO-Link | 20 individual segments |
| Colors illuminant | 21 colors can be displayed |
| Flashing/blinking function | yes |
| Dimming function | 0 - 100% in 10% steps |
| Light pattern | 10 light patterns (30-120Hz)/min |
| Protective tube | Borosilicate glass |
| Housing | aluminum die-casting |
| Connection | 1x M20 blanking plug & 1x M20 20 EX-d 6.5-14mm cable gland |
| Protection class (IP) | IP66 |
| Impact resistance | 7 Joule |
| Weight | ca. 5,6 kg |
| Tamb (IO-Link Modul) | -20°C - +50°C |
| Dimensions | 430 x 174 x 210 mm |
| EX zones | 1, 2 & 21, 22 |
| Gas explosion protection |  II 2 G Ex db IIC T6/T5/T4 Gb |
| Dust explosion protection | II 2 D Ex tb IIIC T120°C Db |
- Datasheet EX ST IO-Link signal tower (566.24 KB)