I.S. isolator

Intrinsic safety

SI interfaces are installed between the process sensors and the main control system. The signals delivered by the SI interfaces are analog, logic or HART.

PR electronics' SI interfaces are distributed worldwide and meet the requirements of international process industry standards. Therefore, SI signal conditioners meet European and American standards.

The ATEX expresses the European directives relating to equipment mounted in explosive areas. The SI interfaces are adapted to these directives and comply with the rules of standard EN 50 014, EN 50 020 282-1-1. Thus, the SI interfaces are certified for operation associated with equipment for an explosive area. In accordance with the ATEX directive, the PR electronics SI interfaces can operate in potentially hazardous areas as follows:

Group 2 (surface industry)

  • Zones: zones 0, 1, 2 for flammable gases, vapors and zones 20, 21, 22 for flammable dust


In addition, several SI interfaces are certified according to the American standard UL 913. 

These modules can work in areas such as:

  • Class I, Division 1, Group A, B, C, D, Zone 0 & 1, Group II C (gas)
  • Class II, Division 1, Group E, F, G (dust)


The universal originality of the 5000 B series offers the customer many concrete advantages:

  • Sensor and cable error alarm function for process optimization
  • Fast response time to optimize the process
  • Technology that eliminates grounding
  • HART transparency with high galvanic isolation
  • Diagnostic function via AMS


Assembly plant

The 7300 board is the ideal choice when there are 4 or more modules to integrate into a process. The 7300 plate stands out for its great flexibility:


Connections suitable for DCS systems
Standard or IS modulesThe standard connection allows integration with the vendors of the following systems:

  • ABB Automation S800
  • Allen-Bradley ControlLogix
  • Emerson Delta V / Delta V SIS
  • Foxboro I / A series
  • GE-Fanuc 90-30 / 90-70
  • Honeywell CI / O
  • Invensys Triconex TMR PLC
  • Mitsubishi Melsec Q series
  • Schneider Electric Modicon Quantum / Modicon Premium
  • Siemens S7 - 300
  • Yokogawa Centum CS3000-R3 / Prosafe
  • Board configuration allowing connection to a security system


The 7300 board also saves a lot of time on wiring. The cable between the control system and the modules is replaced by a multiple cable with for example a SUB D 25 connector.