MRD - Industrial Communication Products & Solutions

Product Overview

SDS300 series DIN-rail managed industrial switch

SDS300 DIN-rail managed industrial switches support up to 4 combo Gigabit/Fast SFP slots + 8 PoE Gigabit copper ports for harsh industrial environments and cost-effective industrial Ethernet. Operating temperature -40°C~ +75°C.

SDS300 DIN-rail managed industrial switches use redundant dual power 9.6~60VDC/18~30VAC and 48~54VDC (PoE models), DIN-rail mount. PoE models deliver up to 30W per PoE port. Rugged aluminum sheet-metal housing, IP40, high-level EMI/EMS testing, and strict burn-in testing meet demanding industry reliability requirements.

Certifications

Contact

FAQ

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

All-Gigabit ports; backplane bandwidth up to 56 Gbps

Wide and diverse power input ranges and types

Rust-resistant sheet-metal housing with hex socket screws

Supports network management

Wire-speed forwarding and auto-negotiation on all ports; supports long-distance transmission

Supports configuration file upload/download

Supports IEEE 802.3af/at PoE

Each PoE port supports 802.3af and 802.3at

Surge protection: power ±4 kV, Ethernet ports ±4 kV

IP40 protection rating

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

Fanless system design for wide-temperature quiet operation

Industrial Ethernet Switch

Specifications

IEEE 802.3 CSMA/CD Method and Physical Layer Specifications

IEEE 802.1p Priority Queuing

IEEE 802.1q VLAN Tagging

IEEE 802.1d Spanning Tree Algorithm

IEEE 802.1w Rapid Spanning Tree

IEEE 802.1s Multiple Spanning Tree

IEEE 802.1x Authentication

IEEE 802.3ac VLAN Tagging

IEEE 802.3ad Link Aggregation

IEEE 802.3af/at PoE

IEEE 802.3x Flow Control

IEEE 802.3 Ethernet

IEEE 802.3u Fast Ethernet

IEEE 802.3z Gigabit Ethernet

IEEE 802 Networks

IEEE 1166 Internet Numbers Internet data

RFC 768 UDP

RFC 791 IP

RFC 792 ICMP

RFC 793 TCP

RFC 826 ARP

RFC 854 Telnet Client & Server

RFC 862 Echo Protocol

RFC 863 Discard Protocol

RFC 1027 Using ARP to Implement Transparent Subnet Gateways (Proxy ARP)

RFC 1059, 1119 NTPv1/2

RFC 1112 IGMP

RFC 1191 Path MTU Discovery

RFC 1542 Bootstrap Extensions & DHCP Relay Agent

RFC 1851 The ESP Triple DES Transform

RFC 1866 HTML

RFC 1994 PPP Challenge Handshake Authentication Protocol (CHAP)

RFC 2068 HTTP

RFC 213 DHCP Server

RFC 2138 RADIUS

RFC 2139 RADIUS Accounting

RFC 2236 IGMPv2

RFC 2474 DiffServ Precedence

RFC 2475 DiffServ Core and Edge Router Functions

RFC 2597 DiffServ Assured Forwarding

RFC 2598 DiffServ Expedited Forwarding

RFC 2644 Directed Broadcasts

RFC 2865 Remote Authentication Dial User Service (RADIUS)

RFC 3046 DHCP Relay Agent Information Option

RFC 3222 Forwarding Information Base (FIB)

GMRP (GARP Multicast Registration Protocol)

GVRP (GARP VLAN Registration Protocol)

SSH2 Secure Shell 2

IGMP Snooping

SNMPv3

Switching Performance -

Backplane bandwidth	20 Gbps (6-port / 10-port models) 56 Gbps (12-port model)
Switching technology	store-and-forward
MAC address table	8K
Packet buffer size	4.1Mbit
Switching rate	148,800 pps per Fast Ethernet port; 1,488,000 pps per Gigabit port

Software Features -

Management Methods	Browser, serial, STD-17 MIB-II, STD-58 SMIv2, STD-62 SNMPv3, SNMPv2c, SNMPv1, RFC3636 MAU, RFC 2925 Ping MIB
Diagnostics	Indicators, log files, port mirroring, TRAP
Redundancy	RSTP, STP, MSTP, port aggregation
time synchronization	NTP
other	4K VLANs, IPv4/IPv6 Multicast, storm control, Jumbo Frame support

Power Parameters +

Power connection	1 removable 5-PIN terminal
Input voltage	9.6 ~ 60VDC / 18 ~ 30VAC 48 ~ 54VDC, redundant dual power input (PoE models)
overload current protection	support
reverse polarity protection	support
Power consumption	≤ 15W (excluding PD)

Physical Characteristics +

Mounting	Din-Rail mounting
shell	Aluminum alloy sheet-metal housing
Protection rating	IP40
Product dimensions (W× H × D)	110mm × 42mm × 105mm (6-port model) 140mm × 42mm × 110mm (10-port / 12-port models)
Weight	<0.6kg

Mechanical Characteristics +

vibration	IEC 60068-2-6
impact	IEC 60068-2-27
free fall	IEC 60068-2-31
circuit board	Compliant with IPC standards Temperature Characteristics
Storage Temperature	-40℃ ~ +85℃
Operating temperature	-40℃ ~ +75℃
humidity	5% ~ 95% (non-condensing)

Electromagnetic Characteristics +
EMI radiation FCC 47 CFR Part 15 Class A
EN55032 Class A
EN55035 Class A
EMC IEC(EN)61000-4-2, Level 4
IEC(EN)61000-4-4, Level 4
IEC(EN)61000-4-5, Level 4
IEC(EN)61000-4-6, Level 3
IEC(EN)61000-4-8, Level 5
Industry Certification & Testing +
Product Safety EN62368-1
EMC EN 55032
EN 55035
EN I EC61000-3-2
EN61000-3-3
FCC Part 15 Subpart B C lass A
other Ministry of Public Security test report, telecom network access license, RoHS

Dimensions

Accessories

model	Product Specification
SDS300-B6R2040T	All-aluminum managed industrial switch with Centauri (Changzheng) software: 6 ports — 2×100/1000BaseX SFP slots (SFP modules not included) + 4×10/100/1000BaseT copper, DIN-rail mount. IP40, -40°C ~ +75°C. Redundant dual power 9.6 ~ 60VDC / 18 ~ 30VAC. Power cable ordered separately.
SDS300-B10R2080T	All-aluminum managed industrial switch with Centauri (Changzheng) software: 10 ports — 2×100/1000BaseX SFP slots (SFP modules not included) + 8×10/100/1000BaseT copper, DIN-rail mount. IP40, -40 °C ~ +75 °C. Redundant dual power 9.6 ~ 60VDC / 18~30VAC. Power cable ordered separately.
SDS300-B12R4080T	All-aluminum managed industrial switch with Centauri (Changzheng) software: 12 ports — 4×100/1000BaseX SFP slots (SFP modules not included) + 8×10/100/1000BaseT copper, DIN-rail mount. IP40, -40°C ~ +75°C. Redundant dual power 9.6 ~ 60VDC / 18 ~ 30VAC. Power cable ordered separately.
SDS300-B6P2040TP	All-aluminum managed industrial switch with Centauri (Changzheng) software: 6 ports — 2×100/1000BaseX SFP slots (SFP modules not included) + 4×10/100/1000BaseT PoE copper, DIN-rail mount. IP40, -40°C ~ +75°C. Redundant dual power 48 ~ 54VDC. Power cable ordered separately.
SDS300-B10P2080TP	All-aluminum managed industrial switch with Centauri (Changzheng) software: 10 ports — 2×100/1000BaseX SFP slots (SFP modules not included) + 8×10/100/1000BaseT PoE copper, DIN-rail mount. IP40, -40°C ~ +75°C. Redundant dual power 48 ~ 54VDC. Power cable ordered separately.
SDS300-B12P4080TP	All-aluminum managed industrial switch with Centauri (Changzheng) software: 12 ports — 4×100/1000BaseX SFP slots (SFP modules not included) + 8×10/100/1000BaseT PoE copper, DIN-rail mount. IP40, -40°C ~ +75°C. Redundant dual power 48 ~ 54VDC. Power cable ordered separately. Specifications subject to change without notice.

Industrial Ethernet

Industrial Wi-Fi

Industrial Cellular

Industrial IoT

Industrial PON

Industrial Power Supply

Software & Service

SDS300 Series Din-Rail Managed Industrial Switch 2F4T

Product Overview

Certifications

FAQ

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

What are the PoE power specifications?
+

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

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

Can non-OEM SFP optical modules work normally?
+

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

What are the power supply requirements for industrial switches?
+

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

Features