R. Stahl IS1+ remote I/O system

The IS1+ Remote I/O system from R. Stahl allows Ethernet communication in hazardous areas via Profinet, Modbus TCP and EtherNet/IP.

Optical cables with transmission rates of 100 Mbps are used for fast, explosion-protected data transmission in Zone 1. The fibre-optic technology, which can cross distances of up to 30 km depending on the optical fibre used, has the type of protection defined as ‘inherently safe’ according to DIN EN 60079-28. Along the lines of intrinsic safety ‘i’, this type of protection ensures that potentially ignitable optical energy is limited to a non-ignitable level even under error conditions.

For Zone 2 and distances of up to 100 m, the more affordable Cat 5 copper cables with protection type ‘ec’ can also be used. Even in explosive atmospheres all modules can be exchanged during operations (hot swapping), and IS1+ stations can always be easily expanded without disconnection.

For the connection of field devices in Zone 0, 1 or 2, R. Stahl also has a range of I/O modules in the IS1+ series with up to 16 channels that are available with intrinsically safe, non-intrinsically safe and pneumatic interfaces. With Profinet connection and comprehensive diagnosis functions, IS1+ is suitable for predictive maintenance applications as well as for the implementation in plant asset management systems.