Moxa EDS-G509 9-Port Full Gigabit Managed Ethernet Switch

Why the EDS-G509 suits control-network edge and ring duty

EDS-G509 is listed by Moxa as: Industrial full Gigabit Ethernet switch with 4 10/100/1000BaseT(X) ports, 5 combo 10/100/1000BaseT(X) or 100/1000BaseSFP slot combo ports, 0 to 60°C operating temperature. A nine-port managed switch with all ports at Gigabit speed (four 10/100/1000T(X) plus combo ports) for backbones that carry video, SCADA and historian traffic together.

Key figures from the Moxa page: the power input is 12/24/48 VDC; Redundant dual inputs; operating temperature is 0 to 60°C (32 to 140°F); dimensions are 87.1 x 135 x 107 mm (3.43 x 5.31 x 4.21 in); weight is 1510 g (3.33 lb); the enclosure is rated IP30.

Standards and approvals printed for this model include marine approvals (ABS; DNV; LR; NK); railway standard EN 50121-4; safety standard EN 62368-1; UL 508. Approvals can differ between variants of a series, so check the one on the exact order code.

Technical specifications

Selecting the right variant

It is used as a ring or core node in plants where Fast Ethernet is no longer enough, for example refinery control networks and large water treatment works.

On the practical side, mounting is listed as din-rail mounting; wall mounting (with optional kit); the housing is metal; the stated MTBF is 598,659 hrs; the warranty period is 5 years. Treat the MTBF as a manufacturer prediction under its stated method, not a guarantee for your site.

Before ordering, confirm which ports are copper and which take SFP modules, and the supply and temperature version. Seven Star LLC is an independent supplier in Muscat and quotes against the exact code you give us.

Installing the EDS-G509 in a control cabinet

Mount the switch on a DIN rail inside a cabinet or, where the panel layout requires it, on a wall with the optional kit. Leave enough space around the metal housing for air to move and for patch cords and fibre to bend without strain. Feed the two removable terminal blocks from separate 12/24/48 VDC sources if redundant power is part of the design, and wire one of the alarm relay outputs to the PLC or an indicator so that a lost supply or link fault is noticed immediately.

Label every copper and fibre connection at both ends before commissioning. On a nine-port node used as a ring or core switch, clear labelling saves time later when a link must be traced quickly during a fault.

Configuration and commissioning

Use the management access described in the user manual and set secure login details before the switch is joined to the plant network. Set the IP address, time synchronisation via NTP or SNTP, SNMPv3 and the user accounts required by site policy, and disable services that are not needed.

Plan VLANs so that control, video and historian traffic are separated, and use the priority queues to protect time-critical control messages. If the switch is part of a Turbo Ring or RSTP ring, set the ring roles with the DIP switches or software as the design specifies, then test recovery by disconnecting one ring link while monitoring a running process. Save the final configuration and keep a backup copy offline.

Operating environment in Oman and the GCC

The 0 to 60°C operating range and IP30 rating make this a switch for the inside of a protected cabinet. Outdoor kiosks and substation panels in Oman can exceed 60°C internally during summer if they stand in the sun without shading or cooling, so measure or calculate the cabinet temperature rather than relying on outdoor air figures.

Humidity must stay non-condensing, which matters in coastal plants where hot humid air meets an air-conditioned panel. Keep cabinet doors sealed against sand and dust, cover unused ports, and keep fibre connectors capped until they are used, since dust on a fibre end face is a common cause of link errors.

Maintenance and network health

Review the event log, port statistics and DDM readings for fibre links at regular intervals; a rising error count or falling optical level often gives warning before a link fails. Check power and alarm wiring during planned shutdowns, and keep firmware and configuration changes under change control so the network can be returned to a known good state.

Documents and quotation

The attached file is Moxa’s published datasheet for the family (moxa-eds-g509-series-datasheet-v1.4). For a quotation, send the full order code, the quantity required and where the goods are to be delivered.

More products in this range: Industrial Communications.