Operating Instructions
IS1 PROFIBUS 3.00 E
- Technical alterations reserved -
4
PROFIBUS DP interface for IS1+
Historical development of remote I/O technology at R. STAHL
As one of the innovators in remote I/O technology, R. STAHL recognized the advantages that remote I/O
technology offers for hazardous areas and has been developing innovative products and solutions for over
30 years since that time. The benefits to users are always the focus here. All communication, power supply
and input/output modules in the system can be connected and disconnected during operation in hazardous
areas. Thanks to an intrinsically safe system design, the installation process is almost identical to this
process in safe areas. No special Ex d or Ex p enclosures are required. Remote I/O can be used to integrate
conventional and HART-capable field devices into modern, digital network structures easily and affordably.
Comprehensive diagnostics options using a separate ServiceBus or the process bus enable integration in
modern plant asset management systems and increase the availability of systems.
1987
The "ICS MUX fieldbus system" from R. STAHL is the first intrinsically safe bus system for sensors
and actuators in hazardous areas (Zone 1) on the market. A master station installed in the control
room establishes the connection to the automation systems. Intrinsically safe communication with
explosion-protected on-site or field stations (VOS) installed in Zone 1 is carried out using a single
coaxial cable.
1993
The system variant "VOS 200", which is based on ICS MUX, is presented. The "VOS 200" is better
suited to smaller signal quantities or decentralized automation units. A master station is no longer
required. Multi-drop is supported and couplings are also available in redundant designs.
1997
"VOS 200" can now also communicate with the PROFIBUS DP, which was new at the time.
R. STAHL achieved this by being the first to develop an intrinsically safe design which, with a few
modifications, is part of the PNO standard today under the name RS485-IS.
2000
Drawing from experience with the ICS MUX and VOS 200, a completely new Remote I/O
– IS1 is
developed. This system is substantially more flexible, easier to use, more powerful and extremely
affordable. Over the years, the IS1 has become the market leader in Zone 1 and is still used around
the globe. IS1 supports open bus protocols such as PROFIBUS DP or Modbus RTU and is available
in different versions for Zone 1, Zone 2 and even Division 1 and 2.
2009
A new communication unit for Ethernet is added to IS1. With this, IS1 is the first remote I/O system
that operates at 100 Mbps/Ethernet in Zone 1. A fibre optic cable with the 'op is' type of protection is
used as a communication medium. Modbus TCP, EtherNet/IP and PROFINET are supported
protocols.
2013
The I/O level is completely modernised and introduced on the market as IS1+. The new
multifunctional I/O modules have configurable inputs/outputs and an innovative diagnostics function
that reports potential module failures up to 12 months before they would occur. IS1+ is even better
suited to extreme ambient conditions from -40 to +75 °C. The new IS1+ modules are fully compatible
with their IS1 predecessors.
2018
The new Zone 2 head assembly consists of a CPU, power module and socket makes IS1+ even
more flexible and has expanded its application range. The previously supported protocols
PROFIBUS DP, Modbus TCP+RTU, EtherNet/IP and PROFINET are now all supported by one CPU
and can be selected by the user. The new assembly has the same predictive diagnostic functions
and the extended temperature range of -40 to 75 °C that are features of the IS1+ modules.
The description below shows the system features of the IS1+ system when connecting to an automation
system via PROFIBUS DP.
