TW900 type

Network equipment for industryIndustrial switching hub TW900 type

This type conforms the standards of 19-inch rack and 1U size. This is an industrial switching hub with port configuration which is needed in the market where high reliability and environmental resistance are called for.

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Product Features

This model is equipped with a 24-port gigabit interface with high environmental resistance and reliability. A flexible gigabit network can be configured with duplication of line through loop configuration. Parts with long operational life are used for the electrolytic capacitor. Because it is a fan-less type, no maintenance parts are required. The data transmission chennnel can be reconstructed within 0.5 seconds when failure occurs. In so doing, the system availability and and reliability are greatly improved. In addition, this model comes with a noise filter having 2 kV of power source noise tolerance. Further , by the high withstand voltage (AC2000 V/ 1 minute) of the power supply module, it can be used under high temperature, noise and high voltage.

  • 2 ports of SFP slot are available.
  • It offers the redundancy by loop configuration
  • Intelligent function
  • No maintenance parts are required because of fan-less design.
  • This model can be used under high temperature, noise and high voltage.
  • It comes with Meiden's unique the Real-Time Transport Protocol (RTP) function and high speed spanning tree protocol
  • Japanese Power Utility Standard (on Protection Relay) B-402 Compliant


Item Transmission specification
Switching mode Store and forward
Switch capacity 18.3Gbps
Transmission method Full duplex / semi duplex
Port configuration 10/100/1000BASE-T 24 ports
(2 ports used as combo-port with SFP port)
SFP slot 100BASE-FX 2 ports Connector in use: 2-core LC connector
Compliant with MMF (Multi-mode Fiber)
Compliant with SMF (Single-mode Fiber)
1000BASE-LX 2 ports Connector in use: 2-core LC connector
Applicable to Single Mode Fiber (SMF) cable. Maximum length of middle-distance SMF: 10 km Maximum length of long-distance SMF: 40 km
1000BASE-BX 2 ports Connector in use: 1-core LC connector
Applicable to SMF cable. Maximum length of middle-distance SMF: 10 km Maximum length of long-distance SMF: 40 km
Abnormality information output terminal One contact (shared with the serial port)
MAC address capacity 16,000 pieces
Flow control IEEE802.3x (full duplex), back pressure (semi duplex)
Path switching function Supported protocols Improved spanning tree protocol (RTP)
Standard spanning tree protocol
(RSTP/STP: IEEE802.1w and IEEE802.1d)
Network configuration Ring or mesh (RTP: Ring only, multi-ring compliant)
Path switching operation time RTP: Within 500 ms (64 nodes, when using 1000BASE-BX)
RSTP: Several seconds STP: Several seconds to several tens of seconds
Path control RIP、OSPF、Static、PIM-SM
Multicast support IGMP snooping
VLAN IEEE802.1q compliant Tag/port base VLAN
A maximum of 256 groups can be configured
Filtering function Short packet and long packet
FCS error packet and symbol error packet
Packet filtering function IP packet filtering by access list
IP, ICMP, TCP, UDP, ARP, MAC address, port number
Packet priority control IEEE802.1p-compliant, 8 levels
Network management SNMPv1 (RFC1157 compliant), SNMPv2, MIB-II, TRAP function
Network operation telnet、http、ICMP、IP
Storm suspension function It can select the setting of packet: broadcast, multicast or disposal of packets with no specific destination
Support function Gratuitous ARP, log data batch collection, Directed Broadcast
HOL control
Serial console EIA/TIA-232-E compliant D-sub 9pin
Saving setting, writing task and updating firmware Web(http)Through the Web (http) or serial port
Item Environmental specification
Type UT222/□□2A
(□□:by types (01 to 07 and 11 to 17))
Mains connector 3P inlet type (AC)/ 2P terminal block (DC)
Power supply voltage range AC85V- 242V47-63Hz/DC80V-143V
Power consumption (during operation) Approx. 32 W (AC100 V)/ Approx. 33 W (DC110 V)
Operating temperature range (during operation) -10 -55°C
Withstand voltage (between power source primary and frame ground (FG)) AC2000 V for 1 minute
Insulation resistance 5 MΩ or more at DC500 V
Power source noise tolerance Rectangular impulse noise 2 kV 50 ns/1 µs
Mass Approx. 2.8kg
External dimensions (mm) W420 × H43 × D280 (without projection)
Applicable standard Compliant with standard for electric power B-402 (excluding the rush current)

Intelligent function

Loop configuration, VLAN and packet priority control function are equipped as intelligent functions and networking through IP multicast and network management function (SNMP/MIB II) is realized. In addition, packet monitor through mirroring of port is possible.

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