28G-port Layer 2 full Gigabit modular managed Ethernet switch

Product Features

  • Multiple interface type 4-port modules for greater versatility
  • Easy replacement of defect ports to minimize downtime and MTTR
  • Passive backplane to minimize the risk of malfunction
  • Ultra-compact size for easy installation
  • Rugged die-casting design for use in harsh environments
  • HTML5 for a better user experience

The MDS-G4028 Series modular managed ethernet switch supports up to 28 Gigabit ports, including 4 embedded ports, 6 interface module expansion slots, and 2 power module slots to ensure sufficient flexibility for a variety of applications. The highly compact MDS-G4000 Series is designed to meet evolving network requirements, ensuring effortless installation and maintenance, and features a hot-swappable module design that enables you to easily change or add modules without shutting down the switch or interrupting network operations. The multiple Ethernet modules (RJ45, SFP, and PoE+) and power units (24/48 VDC, 110/220 VAC/VDC) provide even greater flexibility as well as suitability for different operating conditions, delivering an adaptive full Gigabit platform that provides the versatility and bandwidth necessary to serve as an Ethernet aggregation/edge switch. Featuring a compact design that fits in confined spaces, multiple mounting methods, and convenient tool-free module installation, the MDS-G4000 Series switches enable versatile and effortless deployment without the need for highly skilled engineers. With multiple industry certifications and a highly durable housing, the MDS-G4000 Series can reliably operate in tough and hazardous environments such as power substations, mining sites, ITS, and oil and gas applications. Support for dual power modules provides redundancy for high reliability and availability while LV and HV power module options offer additional flexibility to accommodate the power requirements of different applications. In addition, the MDS-G4000 Series modular managed ethernet switches features an HTML5–based, user-friendly web interface providing a responsive, smooth user experience across different platforms and browsers. Check MDS-G4012 (12 port modular switch) clicking here & MDS-G4020 (20 ports modular switch) on clicking here




  • MDS-G4028 Datasheet


Spec Description
Ethernet Interface
Pre-installed Modules  4 embedded Gigabit ports
Module 6 slots for optional 4-port FE/GE modules
Slot Combination See the LM-7000H module series datasheet for more information
Standards IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3z for 1000BaseX
IEEE 802.3x for flow control
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.1Q for VLAN Tagging
IEEE 802.1D-2004 for Spanning Tree Protocol
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1p for Class of Service
IEEE 802.1X for authentication
Ethernet Software Features
Filter GMRP, GVRP, GARP, 802.1Q VLAN, IGMP Snooping v1/v2/v3, IGMP Querier
Management IPv4/IPv6, Flow control, Back Pressure Flow Control, DHCP Server/Client, ARP, RARP,LLDP, Port Mirror, Linkup Delay, SMTP, SNMP Trap, SNMP Inform, SNMPv1/v2c/v3,RMON, TFTP, SFTP, HTTP, HTTPS, Telnet, Syslog, Private MIB
Redundancy Protocols STP, RSTP, Turbo Ring v2, Turbo Chain, Ring Coupling, Dual-Homing, Link Aggregation
Security Broadcast storm protection, Rate Limit, Trust access control, Static Port Lock, MAC,Sticky, HTTPS/SSL, SSH, RADIUS, TACACS+, Login and Password Policy
Time Management SNTP, NTP Server/Client, NTP Authentication
Protocols IPv4/IPv6, TCP/IP, UDP, ICMP, ARP, RARP, TFTP, DNS, NTP Client, DHCP Server,DHCP Client, 802.1X, QoS, HTTPS, HTTP, Telnet, SMTP, SNMPv1/v2c/v3, RMON,Syslog
Switch Properties
MAC Table Size 16 K
Max. No. of VLANs 256
VLAN ID Range VID 1 to 4094
IGMP Groups 1024
Priority Queues 8
Packet Buffer Size  12 Mbits
Serial Interface
Console Port RS-232 (TxD, RxD, GND), 8-pin RJ45 (115200, n, 8, 1)
USB Interface
USB Connector USB Type A (Reserved)
Input/Output Interface
Digital Input Channels  1 (On MGMT Module)
Digital Inputs  +13 to +30 V for state 1
-30 to +3 V for state 0
Max. input current: 8 mA
Alarm Contact Channels 3 (On MGMT, PWR1, PWR2 Module)
Relay output with current carrying capacity of 2 A @ 30 VDC
Power Parameters
Input Voltage Isolated redundant power module
with PWR-LV-P48 installed:
24/48 VDC for the switch system
48 VDC for PoE system (53 to 57 VDC is recommended for PoE+ devices)
with PWR-HV-P48 installed:
110/220 VDC/VAC for the switch system
48 VDC for PoE system (53 to 57 VDC is recommended for PoE+ devices)
Operating Voltage with PWR-LV-P48 installed:
18 to 72 VDC for the switch system
46 to 57 VDC for PoE systems
with PWR-HV-P48 installed:
88 to 300 VDC,
90 to 264 VAC for the switch system
46 to 57 VDC for PoE systems
Input Current with PWR-LV-P48 installed:
PWR input current (switch system)
Max. 0.53 A @ 24 VDC
Max. 0.28A @ 48 VDC
with PWR-HV-P48 installed:
PWR input current (switch system)
Max. 0.11 A @ 110 VDC
Max. 0.06 A @ 220 VDC
Max. 0.29 A @ 110 VAC
Max. 0.18 A @ 220 VAC
Overload Current Protection Supported
Reverse Polarity Protection Supported
Physical Characteristics
IP Rating IP40
Dimensions  218 x 115 x 163.25 mm (8.59 x 4.53 x 6.44 in)
Weight 2840 g (6.27 lb)
Installation DIN-rail mounting, Wall mounting (with optional kit), Rack mounting (with optional kit)
Environmental Limits
Operating Temperature Standard Temperature: -10 to 60°C (-14 to 140°F)
Wide Temperature: -40 to 75°C (-40 to 167°F)
Storage Temperature (package included) Storage Temperature (package included) -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity  5 to 95% (non-condensing)
Standards and Certifications
EMC EN 55032/35
EMI CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 20 V/m
IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
IEC 61000-4-5 Surge: Power: 4 kV; Signal: 4 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
IEC 61000-4-11 DIPs
Safety EN 62368-1
Railway EN 50121-4
Traffic Control NEMA TS2
Vibration IEC 60068-2-6
Shock IEC 60068-2-27
Freefall IEC 60068-2-31
Time 966,801 hrs
Standards Telcordia SR332

Ordering info

Available Models

Model No.Model Description
MDS-G4028 Layer 2 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 6 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 28 Gigabit ports, -10 to 60°C operating temperature (Pl. select Modules as per configuration / requirement)
MDS-G4028-T Layer 2 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 6 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 28 Gigabit ports, -40 to 75°C operating temperature (Pl. select Modules as per your requirement)
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