• Intrinsically safe Ex ia IIC, Ex e, Ex nA or Ex nL inputs and outputs
  • Fieldbus communication: Modbus RTU, Profibus DP V0 and DP V1 HART, Industrial Ethernet, Modbus TCP, EtherNet/IP, PROFINET
  • Hot swap for all modules
  • Full redundancy or media redundancy
  • Optional ServiceBus for parameterization, fault diagnostics and HART communication
  • DTM technology for full access to all system and HART field device information
  • Field enclosures in many versions, engineered to choice

IS1+ is extremely simple to use: A CPU & Power Module and several input/output modules are snapped on to the BusRail (35 mm DIN rail). The unique power supply concept, developed especially for use in hazardous areas, makes system planning as simple as for normal industrial I/O systems. Plug & play without separate engineering tools.


IS1+ is particularly flexible: Suitable for small and big signal quantities with field stations installed in safe or explosive atmospheres. An intrinsically safe fieldbus using copper-wire or fibre-optic technology connects field stations in Zone 1 / Division 1 with the automation devices. The system is completely HART transparent.


IS1+ is extremely economical: Modules with 8 or 16 inputs lower the price per signal. DTM technology is used for full integration into standard Asset Management and Engineering systems allowing easy and fast commissioning, trouble shooting and maintenance.

*) Restrictions see table explosion protection

ATEX / IECEx NEC 505 NEC 506 NEC 500
Class I Class I Class II Class III
Zone 0 1 2 20 21 22 Zone 0 1 2 20 21 22 Division 1 2 1 2 1 2
Ex interface x x x x x x Ex interface x x x x x x Ex interface x x x x x x
Installation in x x x*) x*) Installation in x x x*) x*) Installation in x x x*) x*) x*) x*)

Data sheets

Document Size Language
Data sheet 2,6 MB English
Data sheet 2,59 MB German
Data sheet 176 kB Spanish
Data sheet 178 kB French

Operating Instructions

Document Size Language
Manual 753 kB English
Manual 1,1 MB English/German
Manual 758 kB German


Customized Solutions

We are providing a set of documentation within the standard scope free of charge as part of our business for customized solutions.
Feel free to ask us to generate a set of customized or project documentation, please note that we will charge for such service against engineering time. For further information please contact our Customer Service Team.

Document Size Language
Technische Dokumentation 186 kB German
Technical Documentation 184 kB English