What is the difference between an S3 and S5?
The S3 is a compact, DIN mounted unit, while the S5 is a panel mount model with far greater resource capacity. For example, an S3 supports a maximum of 10 serial ports, while the S5 can support hundreds. The S5 comes standard with dual Ethernet ports and can accept both ISA and PCI interface cards when appropriate. Configuration follows precisely the same outline for either model.