20 Port Full Gigabit Unmanaged Industrial Switch, Rack Mount

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Model: RDDLZ-ES-GE3020G
Weight: 1.00
SKU: RDDLZ-ES-GE3020G

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Fanless IP40 rated 20 ports Layer 2 full Gigabit industrial switchs, operating temperature range is -40 to 70° C to satisfy any special needs of industrial automation, outdoor applications and harsh weather conditions.

Specification

Model	RDDLZ-GE3020G
Technical Parameters
Protocol Standard	IEEE802.3 (Ethernet), IEEE802.3u (100Base-TX&100Base-FX), IEEE802.3x (Flow control), IEEE802.3ab (1000Base-T), IEEE802.3z (1000Base-LX), 802.1az, 802.1ab
Switch Capability
MAC Table Size	16k
Backplane Bandwidth	40Gbps
Switch Delay	<5μs
Interface
Gigabit Ports	Number: 20
	Connector: 4 Gigabit SFP ports + 16 Gigabit RJ45 ports
	Baud rate: 1000Base-LX (Optical port), Self-adaption 10/100/1000MBase-TX
Terminal Block for Power Input	5.08mm terminal block
Terminal Block for Relay Alarm	5.08mm terminal block, 1A@24VDC
Communication Distance
Twisted-pair	100m (CAT5/CAT5e cable)
Multi-mode Fiber	Gigabit multi-mode: 850nm, 500m
Single mode Fiber	Gigabit single-mode: 1310nm, 20km
LED Indicator Lights
Front Panel LED Lights	Port light: LINK/ACT, SPEED
	System work light: SYSTEM
	Power status light: POWER
Power
Input Power	AC/DC 110v 120v 220v 230v 240v (85-264VAC/110-370VDC) single isolate power supply
Power Consumption	<15W@(MAX)
Overload Protection	support
Inversed Protection	support
Redundancy Protection	support
Working Environment
Operating Temperature	-40°C~70°C
Storage Temperature	-40°C~85°C
Ambient Humidity	5%~95%
Physical Characteristics
Shell	IP40 protection, aluminum alloy shell
Installation	Standard 19-inch rack mounting
Dimension	482.6mm × 44mm × 315mm (W×H×D)
Weight	3.8kg
Industry Standard
EMC	EN61000-4-2(ESD), Level 4 EN61000-4-3(RS), Level 4 EN61000-4-4(EFT), Level 4 EN61000-4-5(Surge), Level 4 EN61000-4-6(CS), Level 4 EN61000-4-8, Level 5
Impact	IEC60068–2-27
Falling	IEC60068-2-32
Shock	IEC60068-2-6

Dimensional Drawing (mm)

Tips: Half-duplex and full-duplex
Half-duplex means that the sending and receiving of the same media is asynchronous. In contrast, full duplex has separate transmit and receive paths. Full-duplex links are the key to extending Fast Ethernet (100Mbps). A full-duplex link network segment cannot exceed two devices, and can be a network card or switch port.
10BASE-T and 10BASE-FL have separate transmit and receive paths, and full duplex can be performed depending on the complexity of the network card or switch port. If these interfaces are configured in half-duplex mode, the synchronous detection of receiving and transmitting will trigger the collision detection. The same interface is set to full duplex, and collision detection is disabled because full duplex does not follow the shared CSMA/CD rules.
As mentioned above, the network range at 100 Mbps has been reduced due to collisions. For twisted pair segments and switch ports, the longest distance of the segment is 100 meters (within the collision domain). The problem is that on fiber ports, for multimode fiber, the length of the network segment is 2 kilometers. For single mode fiber, it is 15 kilometers. In the half-duplex mode, it is limited by the collision domain, and the network segment distance is 412 meters. Therefore, only in full-duplex mode (CSMA/CA is ignored), the extension of the fiber segment can reach its limit.

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