Factory floors can be harsh environments. Extreme temperatures can be generated in the manufacturing process, machinery can be noisy and generate electromagnetic interference and space is a premium. But engineers still need to be able to access and maintain equipment safely and without downtime. As factories expand and modernise older equipment and remote devices need to be networked, but cabling can be expensive and impractical, especially over larger areas. The ES-571 with total galvanic isolation has 1 serial port that is software selectable as either RS232, RS422 or RS485 and 2 Ethernet ports. The 'Easy Wire' removable color coded Screw Terminals Blocks are individually numbered for simple fast, error free wiring. The slim 'end on' case with integral mount clips straight on to a DIN Rail. The ES-571 has an operating temperature range of -30?C to +80?C and +5VDC to +30VDC Dual input reverse polarity protected power supply. The two port 10/100Mbps unmanaged Ethernet Switch assures fast packet delivery by utilising a 1k MAC address lookup table and a store and forward architecture.