The DS105A industrial Ethernet switch is designed with network features for the industrial automation application. With the Broadcast filtering , VLAN and CoS function, it enhances the network transmission performance. The 10~60Vdc wide range power input or low voltage 18~30Vac can be used for building automation control. The wide operation temperature -40~75C and heavy industrial EMC design makes DS105A suitable for any industrial application.
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Broadcast Storm Protection

•Auto drop incoming broadcast packets for network availability protection
•Fast enable/disable through DIP Switch for customer requirement

Easy DIP switch Configuration

•QoS Control
•Broadcast Storm Protection

QoS Service for Time-Sensitive Applications

•Easy DIP Switch Configuration
•VLAN Tag Hi/ Low priority ID, 8:1 scheduling scheme

Hardened System Design

•Operates Under -40 ~75°C  Environment
•Wide Range Redundant  Power Input, 10~60Vdc or AC18~30V
•Ingress Protection – IP31

Pre-defined High Performance VLAN Group

•Member port individual grouping with Uplink port #5
•Easy DIP Switch Configuration

Special Vertical Market Application

•Factory Automation – Real Time Machine Communication
•Railway Track Side – PLC Communication
•Low AC Voltage application – AC18~30V Building Automation

Long Packet Forwarding

•64~1536 Bytes for double-tag VLAN or further application

Compact Size with fiber Uplink

•Single Mode Model: 30KM
•Multi Mode Model: 2KM
•SC, ST type fiber connector


Standard IEEE 802.3 10Base-T Ethernet
IEEE 802.3u 100Base-TX Fast Ethernet
IEEE 802.3x Flow Control and back-pressure
IEEE 802.1p Class of Service (CoS)
IEEE 802.1Q Quality of Service


Switch Technology Store and Forward Technology with Non-Blocking Switch Fabric
MAC Address Table 1K
Packet Buffer 448K bits
Transfer performance 10Base-T: 14,880pps, 100Base-TX: 148,800pps
Forwarding Packet 64~1536 Bytes
Broadcast Filtering

DIP Switch Configurable. (DIP Switch -1)

Broadcast Storm Packet Filtering Threshold:

100Mbps Link Speed: 600 Packets/ Per Second

10Mbps Link Speed: 60 Packets /Per Second

Default Setting (Off)

Quality of Service

DIP Switch Configurable. (DIP Switch -2)

Compliance with IEEE 802.1p class of service with Tag Based Priority.

Each port support 2 priority queues, the output queue scheduling with 16 (High):1(Low) scheme.

Default Setting (Off) 

Port Based VLAN

DIP Switch Configurable. (DIP Switch -3)

Port VLAN Grouping Rule:  Port 5-1 / Port 5-2 / Port 5-3 / Port 5-4  (Port 5 Uplink Port)

Default Setting (Off)


Ethernet Port


5 x 10/100Base-TX RJ45, Auto-Negotiation , Auto MDI/MDI-X

4 x 10/100Base-TX RJ45, Auto-Negotiation, Auto MDI/MDI-X
1 x 100Base-FX (SC Connector)
4 x 10/100Base-TX RJ45, Auto-Negotiation, Auto MDI/MDI-X
1 x 100BaseFX (ST Connector)
System LED 1 x Power: Green On
Ethernet Port LED RJ-45:Link (Green On), Activity (Green Blinking)
Fiber: Link (Green On), Activity (Green Blinking)
DIP Switch

DIP Switch -1:  Broadcast Storm Protection Control (Default Disable/ Off)

DIP Switch -2:  QoS Control (Default Disable/ Off)

DIP Switch -3:  Port Based VLAN (Default Disable/ Off)

Power input 4-Pin Removable Terminal Connector with Power Redundancy, Polarity Auto Reverse
•V+ (L): DC +  or Live
•V- (N): DC -  or Neutral
•Negative DC Power Input Supported  ( -48V or -24V  Power System)

Optical Fiber (DS105A-M/S)

Distance Wavelength TX power RX Sensitivity Link Budget
Single-Mode 30KM 1310nm -15dBm (Min) -34dBm (Max) 19dB
Multi-Mode 2KM 1310nm -20dBm (Min) -32dBm (Max 12dB

Power Requirement

Input Voltage

DC 24V, Rating 9.6~60Vdc, Redundant Power Input with Auto Polarity Reverse function

Low AC Voltage  18~30Vac for the Building Automation Control

Auto Polarity Reverse Yes
Power Consumption DS105A: 3 watts (Maximum)
DS105A-m / DS105A-s: 4 watts (Maximum)


EMC EN61000-6-2/ EN61000-6-4
EMI CISPR 22, FCC part 15B Class A
EMS EN61000-4-2 ESD: 8KV(Air), 6KV(Contact)
EN61000-4-3 RS: 20V/m(80M~1GHz), 10V/m(1.4G~2.1GHz), 5V/m(2.1G~2.5GHz)
EN61000-4-4 EFT: 2KV (Power, Signal Port, GND)
EN61000-4-5 Surge: Power: 2KV/1KV(Line to Ground/Line to Line), Signal Port: 2KV(Line to Ground)
EN61000-4-6 CS: 10Vrms(Power, Signal Port)
EN61000-4-8 Magnetic Field: 30A/m continues /300A for 1~3s
Installation DIN Rail
Enclosure Material Steel Metal
Dimension 32mm (W) x 103mm (H) x 82mm (D)  / without DIN Rail Clip
Ingress Protection IP31
Weight 305g without package
Operating Temperature & Humidity -40°C~75°C , 0%~95% Non-Condensing
Storage Temperature -40°C~80°C
MTBF >200,000 hours
Hi-Pot Insulation AC1.0 KV for Power- Chassis Ground, Power – Ethernet, Chassis Ground- Ethernet, Ethernet - Ethernet
Warranty 5 years



Model Name


DS105A Industrial 5-port Unmanaged Ethernet Switch
DS105A-M-SC-2 Industrial 4-port Unmanaged Ethernet Switch, 1 x multi-mode, 2km/1310nm, SC
DS105A-M-ST-2 Industrial 4-port Unmanaged Ethernet Switch, 1x multi-mode, 2km/1310nm, ST
DS105A-S-SC-30 Industrial 4-port Unmanaged Ethernet Switch, 1x single-mode, 30km/1310nm, SC
DS105A-S-ST-30 Industrial 4-port Unmanaged Ethernet Switch, 1x single-mode, 30km/1310nm, ST
  Package List
1 x Product Unit
1 x 4-pin Removable Terminal Connector
1 x Attached Din Clip
1 x Quick Installation Guide