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Signal tower ST40: Reliable signalling of machine and system statuses.
The ST40 signal tower with a 360° all-round LED display is the perfect solution for fast and reliable signaling of machine and plant statuses. A far-reaching perception can be achieved with the optional siren.Thanks to the integrated IO-Link interface, the product can be easily and seamlessly integrated into an existing IO-Link network.
The signal tower is the ideal choice for maintaining maintaining visibility, especially in confusing or spacious environments.
Mechanical | |
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Connection types |
Plug-in terminals |
Protection level |
IP66 IP69k |
Working temperature | -30 °C ... +60 °C |
Electrical | |
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Power supply |
24 V DC |
Interfaces |
IO-Link |
Optimum status signalling
- All-round LED display for 360° visibility
- Traffic light function as flashing or permanent light (green, yellow, red)
- Optional siren as a continuous or pulse tone for better perception
- Reduced installation time thanks to self-explanatory connections and intuitive mechanics
- Base or single-hole installation with corresponding mounting accessories
- IO-Link interface for seamless integration and communication in the latest IIoT control concepts
- Can be combined with all IO-Link products
- Waterproof and dustproof
- Wide temperature range
- Long service life
Accessories

Angle bracket, concealed cable entry
for signal tower with floor mounting- Concealed cable entry
- PC/ABS black
- 65 x 55 x 30 mm
6-0000-S080-0002 |

Bracket, profile rail mounting for signal tower with single-hole mounting
for signal tower with single-hole mounting- with cable gland
- PC/ABS black
- 70 x 41 x 37 mm
6.0000.S090.0002 |

Simple connection for any Ethernet protocol.
Different variants for the EtherNet/IP, EtherCAT and PROFINET protocols with 4 Class A ports.Existing field devices that send classic switching signals can also be operated in SIO mode via the Class A ports.
IOL4A.124341.1222XX |

Simple connection for any Ethernet protocol.
Different variants for the EtherNet/IP, EtherCAT and PROFINET protocols with 4 Class A and 4 Class B ports.Existing field devices that send classic switching signals can also be operated in SIO mode via the Class A ports.
IOL4A4B.1L8341.1L21XX |