Atop Industrial Networking

Atop is quoted per part rather than listed at a fixed price, because most models are ordered as a build: port count, PoE, SFP fibre, power input and mounting all change the part number. Send the model code, or the port count and certification you need, through the contact form and we come back with a UK price ex VAT and a confirmed lead time.

Several. The EHG7307 is EN 50155 certified, with 5 Gigabit copper ports, 2 SFP slots and a -40°C to 70°C range. The EMG8608 is an IP67 managed Layer-3 railway PoE switch on M12 connectors for on-board or unenclosed trackside mounting. For a 19-inch rack the RHG7528 carries up to 28 ports. The SE8502 serial server is certified to EN 50155 and EN 50121-4.

The EHG9508 is IEC 61850-3 certified: the 2SFP build gives 6 Gigabit copper ports and 2 SFP slots, with GOOSE transmission, IEEE 1588v2 time synchronisation and sub-20 ms ring recovery for bay level. Add an NTS8610 grandmaster clock for GNSS-derived time at plus or minus 40 ns on PTP, and a PG5900 series protocol gateway to bring legacy serial IEDs into IEC 61850.

SE models are serial device servers: they carry raw RS-232, RS-422 or RS-485 over Ethernet so a host sees a virtual COM port. MB models are Modbus gateways translating between Modbus TCP, RTU and ASCII, and the MB5904D-CT adds a data concentrator that maps slave data into memory across up to 64 connections. PG models convert serial IED protocols into IEC 61850 for smart grid work.

Most rugged models take a wide DC input with redundancy, typically 9 to 48 VDC, and several accept PoE instead. The MB5901 is available in an IEEE 802.3af powered build, and the MB5904D-CT takes dual 12 to 48 VDC or 802.3af. Where only a 12 VDC supply exists, the IJG7001 injector boosts it to 30 W of 802.3at PoE+ across two Gigabit ports.

Unmanaged suits a small fixed segment. The EH2308 gives eight 10/100 ports in an aluminium housing from -10°C to 70°C. Choose managed where you need ring redundancy, VLANs, IEEE 1588 or SNMP: the EHG7508-8PoE has eight Gigabit PoE ports at 30 W each within a 240 W budget. Lite-managed models such as the EHG2408 and EHG6508 sit between the two with a cut-down management set.