Winsonic NE11003-20844B 8-Port Gigabit + 4 Combo Managed PoE Switch

A twelve-port managed PoE switch for camera and access-point clusters

The NE11003-20844B is an industrial-grade managed PoE switch with eight 10/100/1000 Mbps RJ45 ports, four Gigabit combo ports and a console port. Ports 1 to 8 deliver power over Ethernet at up to 30 W each. The datasheet heading names it an industrial fast ring managed PoE switch, and it is described as fanless with lightning and static protection.

The PoE budget is 185 W against a 200 W power supply rating, so a full set of eight powered devices needs attention to the total: eight devices at 30 W would exceed the budget, while eight IP cameras at around 15 W sit comfortably inside it. The four combo ports give a choice of copper or fibre uplinks and are the usual way to chain a second cabinet or reach the control room.

Eight PoE ports within a 185 W budget cover a typical perimeter or yard camera layout. The datasheet states that data and power reach 100 metres, which is the standard Ethernet limit. Because ports 1 to 8 carry PoE while the four combo ports do not, cameras and access points go on the numbered copper ports and the combo ports are kept for uplinks and non-powered devices.

Technical specifications

PoE management and managed-switch functions

Beyond standard switching, the datasheet lists PoE management with per-port on/off configuration, alive checking for powered devices and a 7/24 on/off schedule. Other printed software functions are summarised below.

Choosing the NE11003 and planning the power budget

Use this switch where powered endpoints cluster within 100 m: CCTV cameras along a perimeter, wireless access points on a plant, or IP phones and intercoms in a station. Use the 185 W budget as the design limit rather than 8 x 30 W. The supply must be 48 to 57 V DC, which is different from the non-PoE siblings that accept 12 to 55 V.

For a smaller four-port unit see the NE11005-20442A, and for 10G uplinks and Layer 3 routing see the NE11001-30844A. Source the copper or fibre combo uplink according to the distance; the datasheet lists multimode and single-mode media for 1000BASE-X. Dimensions of 145 x 109 x 62 mm allow DIN-rail or wall mounting inside compact enclosures. The pin table shows PoE on Mode A only.

A practical design method is to list every powered device and its rated draw, add the total, and keep it below 185 W with a margin of about twenty per cent for start-up peaks. Use the PoE scheduling function if devices such as lighting-linked cameras only need power at set hours, and use alive checking so the switch restarts a powered device that stops responding, which saves a site visit at unmanned locations. The surge rating of 2 kV differential and 4 kV common mode is for the data lines, so outdoor camera runs still need appropriate external protection.

Because the switch is managed, VLANs can separate camera, access-point and control traffic, and storm suppression helps contain faults. The one-click ring function allows two or more units to be chained in a loop, with spanning tree and ERPS available for more advanced topologies. Keep the console cable for first set-up, then use the web interface or SSH.

Documents and quotation

The manufacturer datasheet for NE11003-20844B is attached. Seven Star LLC supplies Winsonic networking products from Muscat. Send the complete model code and the powered-device list to receive a quotation. Related products are listed under Industrial Communications.