All TRi PLCs carry CE marking for conforming to the requirement of provision s in the EMC Directive 89/336/EEC as amended by 92/31/EEC, 93/68/EEC and 93/97/EEC.

As TRi PLCs operate below the current threshhold stipulated for UL Class 2 device, it does not need UL listing and approval for safe operation. This has no impact on the equipment that require UL certification since many of our PLCs have already been deployed in equipment and machinery that have undergone UL certification.

To optimize the computational performance, the current generation of F-series and  M-series PLCs only compute using 32-bit integer arithmetics and do not support floating point computation.

However, many computational task that seems to involve floating point math can also be handled using "fixed point" math, in which case a unit integer represents, say 0.01, and since a 32-bit integer can represent numbers of up to +/- 2 billion you can get a lot of fractional arithmetics computation done this way.

You can check the selection chart for each PLC family for an overall view of the number of digital I/Os, analog I/O, serial comm ports, etc available to the PLCs. Then go the "Product Home" page and select the respective PLC family and then select the PLC model of interest for viewing.

We have made all hardware manuals available online for all the PLC and peripherals, including installation guide, user manual, programmer's reference etc. So be sure to find them when you browse the detail for each PLC model.

PAC was a newly coined term in the last few years to describe more sophisticated controllers that share the same hardware architecture as the 'Win-Tel' PC. These PAC were better equipped in terms of capability that traditional microcontrollers. They often operated on more advanced microprocessors and programming language. Even though the TRi F-series and M-series 'super PLCs' are not based on PC architecture, they do, however offer lots of features that are found in a typical PAC and suit the control needs for many different industries.