RKS-G4028 Series

28G-port (with 802.3bt PoE option) full Gigabit modular managed Ethernet switches

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Features and Benefits

Meets a wide range of demands from Fast Ethernet to full Gigabit industrial networks (up to 28 Gigabit ports)
Modular interfaces for flexible connector type combinations
Support for IEEE 802.3bt PoE for up to 90 W output per port
High EMC immunity compliant with IEC 61850-3 and IEEE 1613
Hardware-based IEEE 1588 PTP for high-precision time synchronization
Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches) If the port link speed is 1 Gigabit or higher, the recovery time is < 50 ms. , and STP/RSTP/MSTP for network redundancy
-40 to 75°C operating temperature range
Supports MXstudio for easy, visualized industrial network management
Developed according to the IEC 62443-4-1 and compliant with the IEC 62443-4-2 industrial cybersecurity standards

Certifications

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Introduction

The RKS-G4028 Series is designed to meet the rigorous demands of mission-critical applications for industry and business, such as power substation automation systems (IEC 61850-3, IEEE 1613), railway applications (EN 50121-4), and factory automation systems. The RKS-G4028 Series’ Gigabit and Fast Ethernet backbone, redundant ring, and 24 VDC, 48 VDC, or 110/220 VDC/VAC dual isolated redundant power supplies increase the reliability of your communications and save on wiring costs.

The modular design of the RKS-G4028 Series also makes network planning easy, and allows greater flexibility by letting you install up to 28 Gigabit ports with various connector types.

Additional Features and Benefits

Layer 3 switching functionality to move data and information across networks (L3 models only)
IEEE 1588v2 PTP (Precision Time Protocol) for network time synchronization
Command line interface (CLI) for quickly configuring major managed functions
IGMP snooping and GMRP for filtering multicast traffic
Port-based VLAN, IEEE 802.1Q VLAN, and GVRP to ease network planning
QoS (IEEE 802.1p/1Q and TOS/DiffServ) to increase determinism
IEEE 802.3ad, LACP for optimum bandwidth utilization
Line-swap fast recovery

TACACS+, IEEE 802.1X, SNMPv3, HTTPS, and SSH to enhance network security
SNMPv1/v2c/v3 for different levels of network management
RMON for proactive and efficient network monitoring
Bandwidth management prevents unpredictable network status with “Lock port” to restrict access to authorized MAC addresses
Port mirroring for online debugging
Automatic warning by exception through email and relay output
Automatic recovery of connected device’s IP addresses
Configurable by web browser, Telnet/serial console, CLI, Windows utility, and ABC-02 or ABC-03 automatic backup configurator

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Alarm Contact Channels

1 relay output with current carrying capacity of 2 A @ 24 VDC
Buttons

Reset button

10/100/1000BaseT(X) Ports (RJ45 connector)

RKS-G4028-4GT models: 4
RKS-G4028-L3-4GT models: 4
100/1000BaseSFP Slots

RKS-G4028-4GS models: 4
RKS-G4028-L3-4GS models: 4
RKS-G4028-PoE-4GS models: 4
RKS-G4028-L3-PoE-4GS models: 4
Module

There are 3 module slots on the switch. Users can select different types of modules to insert into the switch. The modules that can be selected include 8-port/6-port modules with 10/100/1000BaseT(X), 10/100BaseT(X), 100/1000BaseSFP, or 100BaseFX (SC/ST connector) interfaces.

Refer to Expansion Modules in the Accessories section for a full list of supported interface modules.
Standards

IEEE 802.1D-2004 for Spanning Tree Protocol
IEEE 802.1p for Class of Service
IEEE 802.1Q for VLAN Tagging
IEEE 802.1s for Multiple Spanning Tree Protocol
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1X for authentication
IEEE 802.3 for 10BaseT
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for flow control
IEEE 802.3z for 1000BaseSX/LX/LHX/ZX

Management

IPv4/IPv6
Note: IPv6 is available for L2 models only.
Flow control
Back Pressure Flow Control
DHCP Server/Client
Note: DHCP Server/Client is available for L2 models only.
ARP
RARP
LLDP
Linkup Delay
SMTP
SNMP Trap
SNMP Inform
SNMPv1/v2c/v3
RMON
TFTP
SFTP
HTTP
HTTPS
Telnet
Syslog
Private MIB
Fiber check
DHCP Relay Agent (Option 82)
Port Mirroring (SPAN, RSPAN)
Filter

GMRP
GVRP
GARP
802.1Q
IGMP Snooping v1/v2/v3
IGMP Querier
Redundancy Protocols

STP
RSTP
Turbo Ring v2
Turbo Chain
Ring Coupling
Dual-Homing
MRP
Link Aggregation
Network Loop Protection
MSTP
Routing Redundancy

L3 models: VRRP
Security

Broadcast storm protection
Rate Limit
Access control list
Static port lock
Sticky MAC
HTTPS/SSL
SSH
RADIUS
TACACS+
Login and password policy
Secure boot
MAC authentication bypass
Trust access control
Dynamic ARP Inspection
DHCP Snooping
IP Source Guard
Time Management

SNTP
IEEE 1588v2 PTP (hardware-based)
Supported power profiles: IEEE 1588 Default 2008, IEC 61850-9-3-2016, IEEE C37.238-2017

NTP Server/Client
NTP Authentication
Protocols

IPv4/IPv6
Note: IPv6 is available for L2 models only.
TCP/IP
UDP
ICMP
ARP
RARP
TFTP
DNS
NTP Client
DHCP Server
Note: DHCP Server is available for L2 models only.
DHCP Client
Note: DHCP Client is available for L2 models only.
802.1X
QoS
HTTPS
HTTP
Telnet
SMTP
SNMPv1/v2c/v3
RMON
Syslog
Industrial Protocols

EtherNet/IP
Modbus TCP
Unicast Routing

L3 models: OSPF, Static Route
MIB

P-BRIDGE MIB
Q-BRIDGE MIB
IEEE8021-SPANNING-TREE-MIB
IEEE8021-PAE-MIB
IEEE8023-LAG-MIB
LLDP-EXT-DOT1-MIB
LLDP-EXT-DOT3-MIB
SNMPv2-MIB
RMON MIB Groups 1, 2, 3, 9
Power Substation

MMS
1588 PTP Power Profile IEC 61850-9-3
1588 PTP Power Profile C37.238-2017

IGMP Groups

1024
Jumbo Frame Size

9.216 KB
MAC Table Size

16 K
Max. No. of VLANs

256
Packet Buffer Size

1.5 MB
Priority Queues

8
VLAN ID Range

VID 1 to 4094

Storage Port

USB Type A

Storage Port

microSD card

LED Indicators

PWR1, PWR2, STATE, FAULT, MSTR/HEAD, CPLR/TAIL, SYNC, EPS

Console Port

RS-232 (RJ45)

Total PoE Power Budget

300 W
Max. PoE Power Output per Port

IEEE 802.3af: 15.4 W
IEEE 802.3at: 30 W
IEEE 802.3bt: 90 W
Input Voltage

RKS-G4028-LV models: 24/48 VDC
RKS-G4028-2LV models: 24/48 VDC (redundant power supplies)
RKS-G4028-HV models: 110/220 VAC, 110/220 VDC
RKS-G4028-2HV models: 110/220 VAC, 110/220 VDC (redundant power supplies)
PoE models: 48 VDC (for the PoE system)
Operating Voltage

RKS-G4028-LV/2LV models: 18 to 72 VDC
RKS-G4028-HV/2HV models: 88 to 300 VDC, 85 to 264 VAC
PoE models: 46 to 57 VDC (for the PoE system)
Overload Current Protection

Supported
Reverse Polarity Protection

Supported
Input Current

RKS-G4028-LV/2LV models:
Max. 2.53 A @ 24 VDC
Max. 1.25 A @ 48 VDC

RKS-G4028-HV/2HV models:
Max. 0.55 A @ 110 VDC
Max. 0.29 A @ 220 VDC
Max. 1.01 A @ 110 VAC
Max. 0.62 A @ 220 VAC

EPS (PoE models only):
Max. 7.50 A @ 48 VDC
Power Consumption (Max.)

RKS-G4028-LV/2LV models:
Max. 60.72 W @ 24 VDC
Max. 60 W @ 48 VDC

RKS-G4028-HV/2HV models:
Max. 60.5 W @ 110 VDC
Max. 63.8 W @ 220 VDC
Max. 62.2 W @ 110 VAC
Max. 64.1 W @ 220 VAC

Note: These are the maximum power consumption ratings for the device with the maximum number of modules installed.

IP Rating

IP30
Dimensions

440 x 44 x 300 mm (17.32 x 1.37 x 11.81 in)
Weight

RKS-G4028-LV/HV models: 4900 g (10.80 lb)
RKS-G4028-2LV/2HV models: 5200 g (11.46 lb)
RKS-G4028-PoE-LV/HV models: 5000 g (11.02 lb)
RKS-G4028-PoE-2LV/2HV models: 5300 g (11.68 lb)
Installation

Rack mounting

Operating Temperature

-40 to 75°C (-40 to 167°F)
Storage Temperature (package included)

-40 to 85°C (-40 to 185°F)
Ambient Relative Humidity

5 to 95% (non-condensing)

Safety

EN IEC 62368-1
IEC 60950-1
IEC 62368-1
UL 61010
UL 62368-1
EMC

EN 55032/35
EN 61000-6-2/-6-4
EMI

CISPR 32, FCC Part 15B Class A
Traffic Control

NEMA TS2
EMS

IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 35 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 Voltage Dips & Interruptions
Power Substation

IEC 61850-3
IEEE 1613
Railway

EN 50121-4
Freefall

IEC 60068-2-32
Shock

IEC 60068-2-27
Vibration

IEC 60068-2-6
Industrial Cybersecurity

IEC 62443-4-1
IEC 62443-4-2

Time

RKS-G4028-4GT-HV models: 572,888 hours
RKS-G4028-4GT-2HV models: 518,894 hours
RKS-G4028-4GS-HV models: 529,925 hours
RKS-G4028-4GS-2HV models: 483,436 hours
RKS-G4028-4GT-LV models: 548,589 hours
RKS-G4028-4GT-2LV models: 479,574 hours
RKS-G4028-4GS-LV models: 508,639 hours
RKS-G4028-4GS-2LV models: 449,160 hours
RKS-G4028-PoE-4GS-HV models: 508,190 hours
RKS-G4028-PoE-4GS-2HV models: 465,282 hours
RKS-G4028-PoE-4GS-LV models: 488,598 hours
RKS-G4028-PoE-4GS-2LV models: 433,472 hours
Standards

Telcordia (Bellcore), GB

Warranty Period

5 years
Details

See www.moxa.com/warranty

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Software, Firmware, and Drivers

Name	Type	Checksum	Version	Operating System	Release Date
Software Package for MXview One Series (Windows version) 300.8 MB	Software Package	E91C617FD76F7C62C5FEDBB0EC1A8735BF9ED0B9365990AD5F7BC7DF4F1C3780051EBB92FB38AF73AC021B53925C02C295997154FBDBC2D61C49B4865A49F09E SHA-512	v1.4.1	Windows 10 Windows 11 Windows Server 2016 Windows Server 2019 Windows Server 2022	Sep 20, 2024 Sep 20, 2024 Release notes
Software Package for MXview One Series (Linux version) 404.8 MB	Software Package	SHA-512	v1.4.1	Ubuntu 18.04 Ubuntu 20.04 Ubuntu 22.04	Sep 20, 2024 Sep 20, 2024 Release notes
Firmware for RKS-G4028 Series 65.2 MB	Firmware	A092EDB74C6393A7636BE36C09FF149A01B2F4340753F1B406786DDD1BECE7F1FB8BC9ED87E53E3DE55EE99B561B7A36900E34FF146490BC6D275D2E3BA56803 SHA-512	v4.0		Jun 28, 2023 Jun 28, 2023 Release notes
Software Package for RKS-G4028 Series (AOI file) 57.0 KB	Software Package	F9A8BC00D28D39841D1E52CAB9D0B99AC8607B5B6D59397FC51EA476FB356E083BC9951BEE4AE60A7BF9F868CE9545CD94163DF080FA3529FE2B2CBCF16D8159 SHA-512	v1.0		Jun 28, 2023 Jun 28, 2023 Release notes
Software Package for RKS-G4028 Series (EDS file) 133.1 KB	Software Package	4A189F47D2B6EE41CEC035F2B21EE258D85FE270C1872A10A62081B536F60FD6488B23EB6965282191F848BC373E6754AFCC9596D6B8C00D4ECF413B3EC5ACEC SHA-512	v1.0		Jun 28, 2023 Jun 28, 2023 Release notes
Software Package for RKS-G4028 Series (MIB file) 403.8 KB	Software Package	BA68AD97C573D17D904C3E8C86DFBE09E1F3AF476CB3C8107EA64CC6F55FEFF2DB3634756B3475350D7334B9A52EE8192938006033CC5A9E24010D735E44132B SHA-512	v4.0		Jun 28, 2023 Jun 28, 2023 Release notes
Firmware for RKS-G4028 Series (L3 models) 66.7 MB	Firmware	E54986B27E02BA40383C14EFBA37733B5D8FE4B7F2378C0A7C33F9D6A51A81E872C5A0A62346A27DEE5403A5C1E7D2D67ACD3985A0FAC178C6C22CB837C655E3 SHA-512	v4.0		Jun 28, 2023 Jun 28, 2023 Release notes

Support Documents

Name	Type	Version	Release Date
FOSS Statement for Various MDS, MDS4XGS, RKS, EDS Series Products 2.2 MB	Declaration	v1.0	Aug 14, 2024 Aug 14, 2024
QIG for RKS-G4028 Series 2.2 MB	QIG	v1.4	Aug 07, 2024 Aug 07, 2024
Moxa Managed Switch Next-generation OS (v4.x) Layer 2 Command Line Interface User Manual 5.4 MB	Manual	v1.2	Jun 26, 2024 Jun 26, 2024
Moxa Managed Switch Next-generation OS (v4.x) Layer 2 User Manual 18.7 MB	Manual	v1.3	Jun 26, 2024 Jun 26, 2024
Datasheet for RKS-G4028 Series 1.1 MB	Datasheet	v1.6	Jun 12, 2024 Jun 12, 2024
Moxa Managed Switch Next-generation OS (v4.x) Layer 3 Command Line Interface User Manual 1.6 MB	Manual	v1.0	Sep 26, 2023 Sep 26, 2023
Moxa Managed Switch Next-generation OS (v4.x) Layer 3 User Manual 3.1 MB	Manual	v1.0	Jun 28, 2023 Jun 28, 2023
Moxa Managed Switch Next-generation OS (v3.x) Layer 2 Command Line Interface User Manual 3.1 MB	Manual	v1.0	Aug 19, 2022 Aug 19, 2022
Moxa Managed Switch Next-generation OS (v3.x) Layer 3 Command Line Interface User Manual 1.5 MB	Manual	v1.0	Aug 19, 2022 Aug 19, 2022

Available Models (24)

Show Images

	Compare RKS-G4028-4GS-LV-T	Compare RKS-G4028-4GT-LV-T	Compare RKS-G4028-L3-4GS-LV-T	Compare RKS-G4028-4GS-2LV-T
Max. No. of Ports	28	28	28	28
PoE Support	–	–	–	–
L3 Functionality	–	–	✓	–
Input Voltage	24/48 VDC	24/48 VDC	24/48 VDC	24/48 VDC
Redundant Power Supplies	–	–	–	✓
External Power Supply	–	–	–	–
Operating Temp.	-40 to 75°C	-40 to 75°C	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare RKS-G4028-L3-4GT-LV-T	Compare RKS-G4028-4GT-2LV-T	Compare RKS-G4028-L3-PoE-4GS-LV-T	Compare RKS-G4028-4GS-HV-T
Max. No. of Ports	28	28	28	28
PoE Support	–	–	✓	–
L3 Functionality	✓	–	✓	–
Input Voltage	24/48 VDC	24/48 VDC	24/48 VDC	110/220 VAC/VDC
Redundant Power Supplies	–	✓	–	–
External Power Supply	–	–	✓	–
Operating Temp.	-40 to 75°C	-40 to 75°C	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare RKS-G4028-4GT-HV-T	Compare RKS-G4028-L3-4GS-HV-T	Compare RKS-G4028-L3-4GT-HV-T	Compare RKS-G4028-L3-4GS-2LV-T
Max. No. of Ports	28	28	28	28
PoE Support	–	–	–	–
L3 Functionality	–	✓	✓	✓
Input Voltage	110/220 VAC/VDC	110/220 VAC/VDC	110/220 VAC/VDC	24/48 VDC
Redundant Power Supplies	–	–	–	✓
External Power Supply	–	–	–	–
Operating Temp.	-40 to 75°C	-40 to 75°C	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare RKS-G4028-L3-PoE-4GS-HV-T	Compare RKS-G4028-L3-4GT-2LV-T	Compare RKS-G4028-L3-PoE-4GS-2LV-T	Compare RKS-G4028-PoE-4GS-2LV-T
Max. No. of Ports	28	28	28	28
PoE Support	✓	–	✓	✓
L3 Functionality	✓	✓	✓	–
Input Voltage	110/220 VAC/VDC	24/48 VDC	24/48 VDC	24/48 VDC
Redundant Power Supplies	–	✓	✓	✓
External Power Supply	✓	–	✓	✓
Operating Temp.	-40 to 75°C	-40 to 75°C	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare RKS-G4028-PoE-4GS-LV-T	Compare RKS-G4028-PoE-4GS-HV-T	Compare RKS-G4028-4GS-2HV-T	Compare RKS-G4028-4GT-2HV-T
Max. No. of Ports	28	28	28	28
PoE Support	✓	✓	–	–
L3 Functionality	–	–	–	–
Input Voltage	24/48 VDC	110/220 VAC/VDC	110/220 VAC/VDC	110/220 VAC/VDC
Redundant Power Supplies	–	–	✓	✓
External Power Supply	✓	✓	–	–
Operating Temp.	-40 to 75°C	-40 to 75°C	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare RKS-G4028-L3-4GS-2HV-T	Compare RKS-G4028-L3-4GT-2HV-T	Compare RKS-G4028-L3-PoE-4GS-2HV-T	Compare RKS-G4028-PoE-4GS-2HV-T
Max. No. of Ports	28	28	28	28
PoE Support	–	–	✓	✓
L3 Functionality	✓	✓	✓	–
Input Voltage	110/220 VAC/VDC	110/220 VAC/VDC	110/220 VAC/VDC	110/220 VAC/VDC
Redundant Power Supplies	✓	✓	✓	✓
External Power Supply	–	–	✓	✓
Operating Temp.	-40 to 75°C	-40 to 75°C	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

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RKS-G4028 Series

28G-port (with 802.3bt PoE option) full Gigabit modular managed Ethernet switches

Features and Benefits

Certifications

Introduction

Additional Features and Benefits

Input/Output Interface

Alarm Contact Channels

Buttons

Ethernet Interface

10/100/1000BaseT(X) Ports (RJ45 connector)

100/1000BaseSFP Slots

Module

Standards

Ethernet Software Features

Management

Filter

Redundancy Protocols

Routing Redundancy

Security

Time Management

Protocols

Industrial Protocols

Unicast Routing

MIB

Power Substation

Switch Properties

IGMP Groups

Jumbo Frame Size

MAC Table Size

Max. No. of VLANs

Packet Buffer Size

Priority Queues

VLAN ID Range

USB Interface

Storage Port

MicroSD Interface

Storage Port

LED Interface

LED Indicators

Serial Interface

Console Port

Power Parameters

Total PoE Power Budget

Max. PoE Power Output per Port

Input Voltage

Operating Voltage

Overload Current Protection

Reverse Polarity Protection

Input Current

Power Consumption (Max.)

Physical Characteristics

IP Rating

Dimensions

Weight

Installation

Environmental Limits

Operating Temperature

Storage Temperature (package included)

Ambient Relative Humidity

Standards and Certifications

Safety

EMC

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