Flexibility: ATOP’s high-density RHG9628 Rack-mounted managed switch provides the flexibility needed for your application demands. You can choose from among six different Core versions: based on power supply, uplink port configurations and embedded Hardware-Assisted Boundary Clock feature. And you can choose from six different 4- or 8-Port modules to customize your device in a very simple way. Designed for Substations: Layer-3 routing support BGPv4, IPv4 static routing, RIP v1/v2 and OSPFv2. Award-winning Performance: RHG9628’s IEEE1588v2 Hardware-PTP version received recognition for nanosecond-level accuracy. This makes RHG9628 one of the most reliable GMC backups. And being embedded with Synchronous Ethernet and with full support for PTP profiles. High-availability, versatility and power: When equipped with High-Availability HSR/PRP modules, RHG9628 complies with the most stringent redundancy requirements, ensuring no packet loss and guaranteeing GOOSE packets arrive at their respective destinations. RHG9628‘s high performance provides a network redundant self-recovery mechanism of under 20ms on full load. This enables you to build a reliable network through almost any redundant ring topology. RHG9628 supports ITU-T G.8032 ERPS Ring, IEEE802.1D-2004 RSTP, STP, MSTP, MRP (Manager/ Client), iA-Ring, iA-Chain and many other compatible ring protocols for network redundancy. With a Multifunctional web dashboard, its offers intelligent features such as Quality of service (QoS), IGMP, port mirroring, and security. It is available in two power input variants: one for low-DC voltage (redundant 24~120VDC input) and one for the more popular High-Voltage applications in the distribution grid (redundant 110~240VAC, 24~120VDC or 120~380VDC input). Additional 4 x 10 Gigabit uplink SFP slots allow RHG9628 to be the backbone of the substation. Consult RHG9628 datasheet to learn more about application and configuration mode.

Switch Properties
Priority Queues	8
VLAN Table	512
MAC-Based VLAN	512
VLAN ID Range	VID 1 to 4094
Trunk Group	8
Static IGMP Groups	128
Dynamic IGMP Groups	256
MAC Table Size	16k
Packet Buffer Size	1.5 MB
Jumbo Frame	9216 Byte
Switching Fabric Capacity	128 Gbps
Maximum throughput	95.24 Mpps

Ethernet
Standards	IEEE 802.3 for 10BASE-T IEEE 802.3u for 100BASE-T(X) IEEE 802.3u for 100BASE-FX IEEE 802.3ab for 1000BASE-T(X) IEEE 802.3z for 1000BASE-X IEEE 802.3ae For 10 Gigabit Ethernet Fiber IEEE 802.3x for Flow Control, backpressure control IEEE 802.1d-2004 for Spanning Tree Protocol IEEE 802.1w for Rapid Spanning Tree Protocol IEEE 802.1s for Multiple Spanning Tree Protocol IEEE 802.1Q for VLAN Tagging IEEE 802.1p for Class of Service IEEE 8021X for Authentication IEEE 802.1AB Link Layer Discovery Protocol (LLDP) IEEE 802.1Q VLAN. IEEE 802.3ad for Port Trunk with LACP IEC-62439-3 Clause 4 PRP (Parallel Redundancy Protocol) IEEE1588v2 PTP (Hardware-based) - (-SB version only) ITU-T G.8261 Synchronous Ethernet
Protocols	IPv4, IPv6, IGMPv1/v2/v3, GMRP, GVRP, SNMPv1/v2c/v3, SNMP Inform, ICMP, Telnet, SSH, DHCP Server/Relay/Client, DHCP Option 66/67/82, BootP, TFTP, NTP Server/Client, SNTP, SMTP, RMON, HTTP, HTTPS, Telnet, Syslog, MRP(Manager/ Client), ERPS, LLDP, IEEE 1588 PTP V2(Hw-based), 802.1x, RADIUS, TACACS+, SyncE, HSR, PRP, ACL, DHCP Snooping, ARP Spoof Prevention, Dynamic ARP Inspection, MLD, UDLD, IP Source Guard, sFlow
Layer-3 Switching Protocols	Routing: static routing, RIP v1/v2, OSPFv2 Multicast: IGMPv1/v2/v3, DVMRP, PIM-DM, PIM-SM, PIM-SSM Routing Redundancy: VRRP (Virtual Router Redundancy Protool)
Redundancy	IEC62439-3 Clause 5 High-Avail-Seamless-Redundancy(HSR) only RHG9X28-M5/6 IEC62439-3 Clause 4 Parallel-Redundancy-Protocol (PRP) - only with RHG9X28-M5/6 ITU-T G.8032 ERPS, STP, RSTP, MSTP, MRP, Compatible Ring/Chain, U-Ring
Automation Profiles	Modbus TCP
MIB	MIB II, IF-MIB, SNMPv2 MIB, BRIDGE-MIB, RMON MIB Group 1,2,3,9

Precision timing

Time Synchronization	Network Time	NTP Server/Client, SNTP
	Precision Time Protocol	Std Version	IEEE1588v1 BC (SW) IEEE1588v2 BC (SW) IEEE1588v2 TC (HW)-ns accuracy
		PTP (-SB) Version	IEEE1588v2 BC (HW)-ns accuracy IEEE1588v2 TC (HW)-ns accuracy Synchronous Ethernet
	Holdover Accuracy	Boundary Clock/ SyncE (-SB)	<30 ns/s (IEEE61850-9-3 compliant)
	PTP Mode (all versions)	Layer-2: Multicast, E2E/P2P, two-steps Layer-3 (IPv4):Multicast,Unicast,Unicast Neg. (E2E/P2P)
	Supported Profiles (-SB version)	C37.238 -2017 Power Profile IEC/ IEEE61850-9-3 Power Profile(2016)
	Additional Interfaces	RHG9528-410GSFP-BC/SB-XX support hardware-assisted BC/TC also on 4x1G or 4x10G SFP uplink slots. 1PPS square pulse issued from a 1PPS output BNC(F)

Power
Rated Supply Voltage	DC version: redundant 24-120 VDC AC version: redundant 100-240 VAC HV version: redundant 120-380 VDC
Input Voltage	DC version: redundant 19-132 VDC AC version: redundant 90-264 VAC HV version: redundant 120-380 VDC
Input Current (Max)	2.66A Max, 64W Max (For DC version models) 0.7A Max, 50/60Hz (For AC version models) 0.52A Max, 62W Max (For HVDC version models)
Power	＜ 70W (85°C)
Reverse Polarity Protection	Yes
Relay Output	1 Relay Output (24V/1A)
Connectors	AC: Barrier Terminal Block 4pin 9.52mm DC: Barrier Terminal Block 3Pin 13mm

Physical Characteristics
Housing	IP30 SPCC metal housing
Dimension (W x H x D)	440 x 44 x 340 mm (not including screws and rack-mount kit)
Weight	5Kg (not including module but module cover only)
Installation	1U Rack-mount, Rack-mount kit included

Environmental Limits
Operating Temperature	-40°C~75°C (-40°F~158°F)
Storage Temperature	-40°C~85°C (-40°F~185°F)
Ambient Relative Humidity	5%~95%, 55°C (Non-condensing)

Regulatory Approvals
Safety	UL/EN/IEC(CB) 62368-1
EMC	FCC Part 15, Subpart B, Class A, EN 55032, EN 55035, EN 61000-6-4:2007+A1 2011, EN 61000-3-2, EN 61000-3-3, EN 61000-6-2:2005
Power Automation	IEC61850-3, IEEE 1613
RoHS 2	Yes

Standard	Item		Value	Level
IEC 61000-4-2	ESD	Contact Discharge Air Discharge	±8kV ±15kV	4 4
IEC 61000-4-3	RS	Enclosure Port	10(V/m), 80-1000MHz, 80% AM, 1~3GHz	3
IEC 61000-4-4	EFT	AC Power Port DC Power Port Signal Port	±4.0kV @5.0kHz ±4.0kV @5.0kHz ±4.0kV @5.0kHz	4 4 4
IEC 61000-4-5	Surge	AC Power Port	Line-to Line±2.0kV Line-to Earth±4.0kV	4 4
		DC Power Port	Line-to Line±1.0kV Line-to Earth±2.0kV	3 3
		Signal Port	Line-to Earth±4.0kV	4
IEC 61000-4-6	CS	AC Power Port DC Power Port Signal Port	10V rms 0.15-80MHz, 80% AM 10V rms 0.15-80MHz, 80% AM 10V rms 0.15-80MHz, 80% AM	3 3 3
IEC 61000-4-8	PFMF	(Enclosure)	100A/m continuous, 1000A/m (1s)	5
IEC 61000-4-11	DIP	AC Power Port	Drop 70% 3 times/s (1period) Drop 40% 3 times/1ms (50 period) Drop 100% 3 times/50m(5-50per.)	-
IEC 61000-4-16	Main Frequency	DC Input / Output	30V continuous, / 300V 1S	4
		Signal Port	30V continuous, / 300V 1S	4
IEC 61000-4-17	Ripple	DC Input / Output	10% of unit (10% Level3)	3
IEC 61000-4-18	Damped Oscillatory	AC Power Port	Line-to-Line ±1.0KV Line-to-Earth ±2.5KV	3 3
		DC Power Port	Line-to-Line ±1.0KV Line-to-Earth ±2.5KV	3 3
		Signal Port	Line-to-Earth ±2.5KV	3
IEC 61000-4-29	DC Input Port	Dips and Interruptions	30% Reduction: 0.1 sec 60% Reduction: 0.1 sec 100% Reduction: 0.05 sec	N/A

Certification	Standard
Shock	MIL-STD-810G Method 516.7 (2014)
Drop	MIL-STD-810F Method 516.7 (2014)
Vibration	MIL-STD-810F Method 514.7 C-1 & C-III Category 4(2014)
Warranty	5 Years
MTBF	20 Years

Main core switch ordering information

MODEL NAME	PART NUMBER	DESCRIPTION
RHG9628-410GSFP-DC	1P1RHG96280004G	4*10G;SFP;2DC
RHG9628-410GSFP-AC	1P1RHG96280006G	4*10G;SFP;2AC
RHG9628-410GSFP-HV	1P1RHG96280005G	4*10G;SFP;2HV
RHG9628-410GSFP-SB-DC	1P1RHG9628000GG	4*10G;SFP;2DC;Support HW-Boundary Clock/ SyncE
RHG9628-410GSFP-SB-AC	1P1RHG9628000KG	4*10G;SFP;2AC;Support HW-Boundary Clock/ SyncE
RHG9628-410GSFP-SB-HV	1P1RHG9628000IG	4*10G;SFP;2HV;Support HW-Boundary Clock/ SyncE

Modules ordering information

MODEL NAME	PART NUMBER	DESCRIPTION
RHG9X28-M1	1P1RHG9X28M101G	8P*1000TX RJ45 Module
RHG9X28-M2	1P1RHG9X28M201G	8P*1000FX SFP Module
RHG9X28-M3	1P1RHG9X28M301G	4P;RJ45 Module and IRIG-B(TB)
RHG9X28-M4	1P1RHG9X28M401G	4P;SFP Module and IRIG-B(TB)
RHG9X28-M5	1P1RHG9X28M501G	4P;RJ45 Module and HSR/PRP
RHG9X28-M6	1P1RHG9X28M601G	4P;SFP Module and HSR/PRP

Optional Accessories

MODEL NAME	PART NUMBER	DESCRIPTION
AC POWER CORD (US)	50892531G	RHG9X28 US AC Power CORD; 183cm
AC POWER CORD (EU)	50891751G	RHG9X28 EU AC Power CORD; 180cm
SDR-240-48	50502401480001G	DIN RAIL POWER SUPPLY / T;AC 100~240V to 48V~55V DC 5A;240W
SDR-480-48	50504801480001G	DIN RAIL POWER SUPPLY / T;AC 100~240V to 48V~55V DC 10A;480W
AXFD-1314-0523	522AXFD1314001G	SFP Transceiver;155Mbps, Multi-mode;1310nm;2km;-40~85, DDMI
AXFD-1314-0553	522AXFD1314011G	SFP Transceiver;155Mbps, Single-mode;1310nm;30km;-40~85, DDMI
AXGD-5854-0513	522AXGD5854001G	SFP Transceiver, 1250Mbps, 850nm, Multi-mode, 550m, 3.3V, -40~85°C, DDMI
AXGD-1354-0523	522AXGD1354001G	SFP Transceiver, 1250Mbps, 1310nm, Multi-mode, 2km, 3.3V, -40~85°C, DDMI
AXGD-1354-0533	522AXGD1354011G	SFP Transceiver, 1250Mbps, 1310nm, Single-mode, 10km, 3.3V, -40~85°C, DDMI
AXGD-3354-0593	522AXGD3354001G	SFP Transceiver, 1250Mbps, 1310nm, Single-mode, 40km, 3.3V, -40~85°C, DDMI
AXXE-5886-05B3	522AXXE5886001G	SFP Transceiver,10Gbps Multi;850nm;300m;-40~85°C

Datasheet

VERSION	NAME	TIME	SIZE	DOWNLOAD
v1.5	RHG9628 Datasheet EN	2025-06-05	804.52 KB
v1.1	Datasheet EN	2022-11-21	935.65 KB
v0.8	Datasheet EN	2021-08-25	1.90 MB
v0.7	Datasheet EN	2021-07-19	2.01 MB
2 older versions

Hardware Installation Guide

VERSION	NAME	TIME	SIZE	DOWNLOAD
v1.2	RHG9528 Hardware Installation guide	2024-12-20	6.16 MB

Manual

VERSION	NAME	TIME	SIZE	DOWNLOAD
v2.4	RHG9628 User Manual	2023-05-29	10.89 MB
v2.3	RHG9628 User Manual	2022-10-31	10.72 MB
v2.2	RHG9628 User Manual	2021-07-19	10.90 MB
2 older versions
v0.2	Managed Layer-3 Switch CLI User Manual	2022-12-28	2.55 MB

Firmware

VERSION	NAME	TIME	SIZE	DOWNLOAD
v6.66	EHG76XX Firmware	2025-05-01	18.80 MB
v6.56	EHG76XX-RHG76XX Firmware	2024-08-26	17.84 MB
v6.50	EHG76XX-RHG76XX Firmware	2024-03-04	17.88 MB
v6.10	EHG76XX-RHG76XX Firmware	2022-02-09	17.31 MB
2 older versions
v4.70	RHG9628 Firmware	2021-07-19	17.16 MB

MIB

VERSION	NAME	TIME	SIZE	DOWNLOAD
	EHG96XX MIB	2022-12-05	20.21 KB

Utility

VERSION	NAME	TIME	SIZE	DOWNLOAD
v5.60	Management Utility for Windows	2021-01-18	23.65 MB

STP/DXF drawings

VERSION	NAME	TIME	SIZE	DOWNLOAD
	RHG9528 STP	2024-12-20	69.50 MB

Test reports

VERSION	NAME	TIME	SIZE	DOWNLOAD
	RHG9528 Declarations of Conformity	2023-03-16	424.80 KB
v1.0	RHG9628 Authorization to apply UL mark UL/CUL 62368-1	2021-07-19	60.13 KB
V1.0	RHG9628 Test Certificate CB IEC62368-1	2021-07-19	268.35 KB
v1.0	RHG9628 Test Report CB IEC62368-1	2021-07-19	4.89 MB
v1.0	RHG9528 Certification CE EMC EN61000-6-2_EN61000-6-4	2021-06-01	9.71 MB
v1.0	RHG9528 Certification CE EMC55032_EN55035	2021-06-01	9.69 MB
v1.0	RHG9528 Certification FCC PART15B	2021-06-01	7.32 MB
v1.0	RHG9528 Certification IEC60255-5	2021-06-01	2.69 MB
v1.0	RHG9528 Certification IEC61850-3 EMC	2021-06-01	11.03 MB
v1.0	RHG9528 Certification IEEE1613	2021-06-01	4.96 MB
v1.0	RHG9528 Test Report IEC61850-3	2021-06-01	28.44 MB