New IS1 I/O modules for zone 2 and non-Ex signals

R. STAHL provides new I/O modules for its remote I/O system IS1, thereby ensuring cost-efficient signal connection in Ex zone 2/22 and in safe areas. Thanks to these new modules, continuous IS1 installations which span different areas of a plant become considerably less expensive. Their pricing even allows for the assembly of cost-optimized field stations in zone 2 or in safe areas. The new module program is designed for all current signal types: it contains models with an analog HART input, analog HART output, digital NAMUR input, digital voltage input and digital relay output. The I/O modules are certified according to zone 2/22 signals and comply with the ignition protection types Ex nA and Ex nL. Signals in safe areas can be connected as well. In such cases, the module inputs allow for operation with both Ex nA and non-Ex sig-nals. Moreover, the new modules offer a key advantage for operation with sig-nals from zone 1/21 and zone 2/22: they can be installed on one bus rail with zone 1/21 modules. The required 50 mm space between intrinsically safe and non-intrinsically safe signals is ensured by a separating plate. The new modules retain all advantages of R. STAHL's remote I/O system, which has been a mar-ket leader for a long time: IS1 allows for a comfortable hot swap of all system components, including CPU and supply unit, in zone 1. It also provides an intrin-sically safe Profibus DP connection via copper conductor or optical fiber and can be designed for full or line redundancy.