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TNM4000 28-Port All-Gigabit Network-Security Power Industry Switch

TNM4000 28-Port All-Gigabit Network-Security Power Industry Switch

Backplane bandwidth up to 56 Gbps

Wire-speed forwarding and auto MDI/MDI-X on all ports; long-distance transmission supported

IP40 protection rating

Compact and easy to install; plug-and-play, no configuration required

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Product Overview

TNM400028

All-Gigabit cybersecurity power-industry switch

TNM400028

All-Gigabit cybersecurity power-industry switch designed for harsh substation automation networks. Supports 24 Gigabit copper + 4 GE/FE auto-sensing SFP as a cost-effective industrial Ethernet solution.

TNM400028

All-Gigabit cybersecurity power-industry switch with 100~240V redundant dual power inputs, rack mounting and rugged aluminum alloy housing. Supports management features such as IGMP snooping, IEEE 802.1Q VLAN, port-based VLAN, QoS and port mirroring.

TNM400028

This all-Gigabit cybersecurity power-industry switch is fanless and supports redundant rings and RSTP/STP to improve system reliability and backbone availability. It meets IP40, passes high-level EMI/EMC tests and strict burn-in, and suits smart substations, distribution automation and renewable plants with strict real-time/security needs for monitoring and relay protection.

Certifications

Contact

FAQ

  • The cable is connected, but the port will not come UP / the link is down. What should I check?

    +

    1) Confirm an industrial-grade cable and proper RJ45 crimping. 2) Check speed/duplex settings; set both ends to auto-negotiation. 3) Check whether the port is administratively shut down, in the wrong VLAN, or restricted by port security.

  • What are the PoE power specifications?

    +

    Standard PoE and PoE+ are supported, with max per-port power of 15.4 W and 30 W respectively. Total system power budget must be calculated during selection to avoid insufficient supply when too many PDs are connected.

  • Which ring protocols are supported, and what is the self-healing time?

    +

    Mainstream industrial ring protocols such as ERPS (G.8032), RSTP/STP, MRP, and PRP are supported. ERPS typical self-healing is ≤50 ms; traditional RSTP is second-level. It is recommended to use one ring protocol consistently across the network.

  • How should I choose between Layer-2 and Layer-3 industrial switches?

    +

    Layer-2 switches: basic features such as VLAN, ring networks, and port mirroring; suited to access layers and same-subnet networking with strong cost performance. Layer-3 switches: add static routing, OSPF, DHCP relay, multicast, and other routing features—choose these when cross-subnet communication or core/aggregation networks are required.

  • Can non-OEM SFP optical modules work normally?

    +

    The device is compatible with generic IEEE 802.3 SFP modules. Non-OEM modules can usually be recognized, but some brands may have compatibility issues. OEM modules are recommended.

  • How do I restore factory settings if I forget the device login password?

    +

    1) Hardware reset: press and hold the RESET button for 5–10 seconds; the device reboots to factory defaults. 2) Software reset: use the vendor NMS to restore factory settings remotely. All custom configurations will be cleared after restore.

  • What are the power supply requirements for industrial switches?

    +

    DC models support 18–60 VDC or 9.6–60 VDC; AC models support 100–240 VAC, with dual redundant power inputs. Phoenix terminal wiring; reverse-polarity protection is built in so normal reverse connection will not damage the device.

  • What are the operating temperature range and protection rating of industrial switches?

    +

    All-metal aluminum alloy housing. Operating temperature is -40°C to +75°C; premium wide-temperature models reach -40°C to +85°C. Typical enclosure rating is IP40.

Features

Backplane bandwidth up to 56Gbps

Uses rust-free aluminum alloy housing with internal hexalobular screws

Supports network management

MSM 2-port unmanaged card-type industrial fiber transceiver: 1 fixed optical (multi-mode, 5 km, SC) + 1×10/100BaseT. Operating temperature -40°C~+75°C.

Supports one-click factory reset and reboot

Supports configuration file upload/download

EMC Level 4

IP40Ingress protection

Compact and easy to install; plug-and-play, no configuration required

Fanless whole-unit design; wide-temp quiet operation

MTBF≥300,000h

Specifications

IEEE802.3CSMA/CDmethodandphysicallayerspecificationsCSMA/CD method and physical layer specifications

IEEE802.1pPriorityQueuingPriority Queuing

IEEE802.1qVLANtaggingVLAN Tagging

IEEE802.1dSpanningTreeAlgorithmSpanning Tree Protocol

IEEE802.1wRapidSpanningTreeRapid Spanning Tree Protocol

IEEE802.1sMultipleSpanningTreeMultiple Spanning Tree Protocol

IEEE802.1xAuthenticationAuthentication

IEEE802.3EthernetEthernet

IEEE802.3acVLANTaggingVLAN Tagging

IEEE802.3adLinkAggregationLink Aggregation

IEEE802.3xFlowControlFlow Control

IEEE802.3uFastEthernetFast Ethernet

IEEE802.3zGigabitEthernetGigabit Ethernet

IEEE802NetworksNetworks

RFC768UDP

UDP

RFC791IP

IP

RFC792ICMP

ICMP

RFC793TCP

TCP

RFC826ARP

ARP

RFC854TelnetClient&ServerTelnet Client & Server

RFC862EchoProtocolEcho Protocol

RFC863DiscardProtocolDiscard Protocol

RFC1027UsingARPtoImplementTransparentSubnetGatewaysProxy ARP

RFC1059,1119NTPv1/2Network Time Protocol v1 and v2

RFC1112IGMPIP

multicast host extensions

RFC1166InternetNumbersInternet Numbers

RFC1191PathMTUDiscoveryPath MTU Discovery

RFC1542BootstrapExtensions&

DHCPDHCP

relay agent

RFC1851TheESPTripleDESTransformESP Triple DES Transform

RFC1866HTMLHTML

language

RFC1994PPPChallengeHandshakeAuthenticationProtocol(CHAP)Challenge Handshake Authentication Protocol

RFC2068HTTP

HTTP

RFC213DHCPServerDHCP Server

RFC2138RADIUS

RADIUS

RFC2139RADIUSAccountingRADIUS Accounting

RFC2236IGMPv2IGMPv2

RFC2474DiffServPrecedence

RFC2475DiffServCoreandEdgeRouterFunctions

RFC2597DiffServAssuredForwarding

RFC2598DiffServExpeditedForwarding

RFC2644DirectedBroadcastsDirected Broadcasts

RFC2865RemoteAuthenticationDialinUserService(RADIUS)Remote Authentication Dial-In User Service

RFC3222ForwardingInformationBase(FIB)Forwarding Information Base

GMRPGARP

GMRP

GVRPGARP

GVRP

SSH2SecureShell2

IGMPsnoopingIGMP snooping

SNMPv1/v2c/v3SNMP

  • Hardware Performance -

    8K packet buffer4.
    1 Mbit switching rate148,800 pps/FE port; 1,488,000 pps/GE port

  • Software Features +

    Management MethodsBrowser, STD-17MIB-II, STD-58SMIv2, STD-59RMON, STD-62SNMPv3, SNMPv2c, SNMPv1, RFC2668MAU, RFC2925PingMIB, SSH, HTTPS,
    Telnet diagnosticsLEDs, log files, RMON, port mirroring,
    TRAP redundancySTP，RSTP，MSTP，
    Link aggregation time syncNTP，
    SNTP Others4KVLANS, IPv4/IPv6multicast, storm control, SupportsJumboFrame

  • Power Parameters +

    Terminal block1 removable 5-
    Terminal-block input voltage100-240VAC(50~60Hz)&100-240VDC，
    Supported power≤27W

  • Physical Characteristics +

    Rack-mount enclosureAll-Gigabit cybersecurity power-industry switch with 100~240V redundant dual power inputs, rack mounting and rugged aluminum alloy housing. Supports management features such as IGMP snooping, IEEE 802.1Q VLAN, port-based VLAN, QoS and port mirroring.
    D）440mm×43.8mm×
    IP40 net weight≤2.0kg

  • Mechanical Characteristics +

    VibrationIEC60068-2-
    6
    ShockIEC60068-2-
    27
    free fallIEC60068-2-
    31
    PCBCompliant with IPC standards

  • Environmental Characteristics +

    storage temperature-40℃~85℃
    operating temperature-40℃~75℃
    Humidity5%~95%, non-condensing

  • Electromagnetic Characteristics +

    EMI radiationFCC47CFRPart15ClassAEN55032Cla
    Layer-3 enhanced IP54/IP67 waterproof/dustproof: 12 FE/Gigabit auto-sensing M12 (4 with power-fail bypass). Industrial isolated power (110VDC/220VAC).IEC(EN)61000-4-2，Level 4IEC(EN)61000-4-3，Level 3IEC(EN)61000-4-4，Level 4IEC(EN)61000-4-5，Level 4IEC(EN)61000-4-6，Level 3IEC(EN)61000-4-8，Level 5

  • Industry Certification & Testing +

    Product SafetyEN62368-1EMCEN55032EN55035ENIEC61000-3-2EN61000-3-3FCCPa
    rt15 Subpart B Class A unitmm

Dimensions

Dimensions

Accessories

ModelProduct Specification
TNM4000-PHH4GX24GEFull aluminum alloy 28-port all-Gigabit cybersecurity power-industry industrial switch: 24×10/100/1000BaseT + 4×100/1000BaseX SFP, rack-mount. 1 CLI, 1 relay alarm. IP40; operating temperature -40°C~+75°C. 100~240V redundant dual power. Includes mounting brackets, monitoring cable and power cord. Due to continuous innovation, specifications are subject to change without notice.

Hotline: 86-21-58330762

Zip: 201203

Email: sales@mrdcom.net

Address: No.123 Curie Road, China (Shanghai) Pilot Free Trade Zone

Copyright 2026 MRD Co LTD . All Rights Reserved Shanghai ICP No.12035199

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