Ethernet switch on a DIN rail JetHome ES1-AC

../_images/es1_ac_face.png

Hint

The switch can be purchased from the manufacturer’s website: https://jethome.ru/es1/

The Ethernet switch JetHome ES1-AC, is designed for use in home automation systems and serves to connect devices (controllers) that have an Ethernet interface and support the power function using Passive PoE technology into a local network.

The DIN-rail design allows the switch to be conveniently placed in the electrical panel next to other controllers.

Dimensions and weight

  • Enclosure dimensions: 130 x 76 x 57 mm.

  • Enclosure width is 76mm, which is about 4.3 standard modules for a DIN rail (17.5mm).

  • Ability to mount the enclosure to a DIN rail 35mm.

  • Weight: 250 g.

Ethernet switch

Warning

  • Only only devices that support power using Passive PoE technology can be connected to the switch.

  • Do not connect to the ports ETHERNET 2 - ETHERNET 5 computers, notebooks and other home devices to avoid damaging them.

The primary function of the device is to interconnect multiple nodes (devices) within a single Ethernet network segment at up to 100 Mbps. Category 5 cable with two or four twisted pairs can be used as a physical layer. The cable uses 8P8C (RJ45) connectors. Pins 1, 2 and 3, 6 of the connector are used for data transmission.

Features of the Ethernet switch:

  • 5-port controller RTL8305NB.

  • Supports IEEE 802.3/802.3u standards with automatic 10/100 Mbps bit rate detection.

  • Supports full-duplex communication in accordance with the IEEE 802.3x standard.

Power supply

The switch has a built-in AC/DC voltage converter with an AC input voltage of 110V to 240V and a DC output voltage of 24V.

The output power of the built-in inverter is 30W. Power is supplied to terminal AC IN of the switch.

Note

When powered by battery, the output voltage on the DC OUT terminal and on the outputs POE OUT will be equal to the battery voltage and will be about 12V.

When the switch is powered by AC mains, the external battery connected to it is charged. The maximum battery charging current is set by the jumper on the charger board inside the switchboard. To change the maximum charging current it is necessary to open the case of the switch and set one of the jumpers: J1, J2 or J3 (see the marking on the charger board).

Three charging modes are supported with maximum current: 0.3A (J1, set by default), 0.6A (J2) and 1A (J3).

Passive PoE In

The switch can be powered by an external DC power supply using Passive PoE technology through the port ETHERNET 1/POE IN.

Nominal supply voltage range is 12V to 48V, maximum supply voltage range is 12V to 56V.*

Note

The built-in AC/DC voltage converter has higher priority and when the controller is connected to AC power, the controller and external devices will be powered from the built-in 24V converter regardless of whether voltage is supplied to the input POE IN.

Passive PoE Out

The switch can power up to 4 devices connected to the ports ETHERNET 2 - ETHERNET 5 (POE OUT) using Passive PoE technology.

When the switch is powered by AC power, the output voltage on the POE OUT ports is 24V. The maximum total current delivered to consumers connected to the POE OUT ports and the DC OUT terminal is 1.3A.

When the switch is powered from the port ETHERNET 1 (POE IN) the output voltage on the ports POE OUT will match the input voltage POE IN, and the maximum total current delivered to consumers connected to the ports POE OUT in this case is 2.5A.

Overload protection

The switchboard has the function of protection against exceeding the maximum output current given to consumers:

  • When powered from AC mains via the built-in AC/DC converter, the maximum current delivered to consumers is 1.3A. If the maximum current draw is exceeded, the device shuts down.

  • When powered from the POE IN port, the maximum current delivered to consumers depends on the external power source used, but cannot exceed 2.5A. When the maximum current consumption is exceeded, external consumers powered from the switch will be turned off. In this case, the indicator POWER OVERLOAD on the front panel of the switch lights up and the relay contacts POWER OK, brought out to the external terminal, open.

Connector assignment

  • ETHERNET 1 - ETHERNET 5 - are for connecting other devices to the switch using Ethernet technology. However, the port ETHERNET 1/POE IN can be used to power the switch using Passive PoE technology, and the ports ETHERNET 2 - ETHERNET 5 (POE OUT) - can be used to power external devices connected to the switch using Passive PoE technology.

  • The terminal POWER OK - dry contacts of the relay. The contacts are closed when the switch outputs POE OUT and DC OUT are energized and open when the total maximum load current is exceeded.

  • The DC OUT terminal is for powering external devices. Output voltage on the terminal is 24V when the switch is powered from AC network, or is equal to the supply voltage on the input POE-IN when the switch is powered from the input POE IN.

  • The terminal BATTERY LOW - closes when the battery voltage is less than 11V.

  • The BATTERY 12V terminal is used to connect an external lead battery.

  • The AC IN terminal is used to connect an external AC source with voltage from 110V to 240V.

Display

The switch has the following indicators to show the state of the switch:

On the front panel:

  • POWER - power indicator, lit green when the switch is powered and red when the total maximum output current consumed by external devices powered by the switch is exceeded.

  • BATTERY LOW - indicator of low external battery charge. Illuminates red when the battery voltage is less than 11V.

On the Ethernet connectors:

  • Green LED - indication of external device connection via Ethernet technology.

  • The orange indicator on the ports POE OUT indicates the presence of output power, on the port POE IN - indicates the switch power from the port POE IN.

Relay

The switch has two relay outputs Dry Contact, duplicate indicators on the front panel of the switch:

Warning

The maximum switchable current of the relay is 1A.

  • Terminal POWER OK - contacts are closed when there is power on the switch outputs POE OUT and DC OUT, open when the total maximum load current is exceeded.

  • The terminal BATTERY LOW - contacts close when the battery voltage is less than 11V.

Installation

The unit can be installed in an electrical equipment cabinet or other location, where it must be protected from moisture, dirt and foreign objects, as well as vibration-free.

Note

For better cooling of the internal components, the housing should be installed in an upright position.

To install it, you have to:

  • Make sure there is enough space to connect the device and run the wires.

  • Securely fasten the unit to the DIN rail or to a vertical surface with screws.

To remove it from the DIN-rail you should:

  • Insert the tip of a screwdriver into the latch eyelet.

  • Press the latch down.

  • Take the controller away from the DIN rail.

Operating conditions

  • Ambient temperature: 0..+40 С.

  • Relative humidity up to 80% without condensation.

  • Closed explosion-proof rooms without aggressive vapors and gases.

Wiring recommendations

It is recommended that stranded copper cables be used to ensure reliable electrical connections. The cable ends should be stripped and then tinned or cable lugs should be used. The cable strands should be stripped so that their bare ends do not protrude beyond the terminal block after connection to the controller.

General requirements for connection lines:

  • When laying the cables, the communication lines connecting the device to the sensors or other devices should be separated into separate routes, and located separately from power cables and cables causing high-frequency and pulse interference.

  • To protect the inputs of the device from the influence of electromagnetic interference, the communication lines of the controller should be shielded. Special cables with braided shielding can be used as shields.

  • It is recommended to install line noise filters in the power supply line of the controller.

  • In the case of controlling power equipment, it is recommended that spark-quenching filters be installed on the switching line of this equipment.