
ISW-621 
ISW-621S15
4-Port 10/100Base-TX + 2-Port 100Base-FX Industrial Fast 
Ethernet Switch 
All of the RJ-45 copper interfaces in the ISW-621 / ISW-621S15 support 
10/100Mbps Auto-Negotiation for optimal speed detection through RJ-45 
Category 3, 4 or 5 cables. The standard Auto-MDI/MDI-X support can detect 
the type of connection to any Ethernet device without requiring special 
straight or crossover cables. 
Key Features
PHYSICAL PORT
• 4-Port 10/100Base-TX RJ-45 with auto MDI/MDI-X function
• 2-Port 100Base-FX interfaces for up to 2km (Multi-mode fiber 
New slim type with more practicability and convenience
PLANET releases the advanced industrial hardened Ethernet Switch with 
new slim type, IP-30 metal case: ISW-621 / ISW-621S15. Each of them 
equips with 4 10/100Base-TX Auto-negotiation ports. The ISW-621 has 
2 100Base-FX multi-mode SC interfaces for transmission distance up to 
2km, and the ISW-621S15 has 2 100Base-FX single-mode SC interfaces 
for transmission distance up to 15km, both of them operate reliably in 
Heavy Industrial demanding environments. Meanwhile, the compact, IP-30 
standard metal case allows either DIN rail or wall mounting for efficient 
use of cabinet space.
50/125µm) on ISW-621
• 2-Port 100Base-FX interfaces for up to 15km (Single-mode fiber 
9/125µm) on ISW-621S15
LAYER 2 FEATURES
• Complies with IEEE 802.3, IEEE 802.3u 10/100Base-TX, 
100Base-FX Ethernet standard
• Supports Auto-negotiation and 10/100Mbps half / full duplex 
mode for each copper port
• High performance Store and Forward architecture, broadcast 
storm control, runt/CRC filtering eliminates erroneous packets 
to optimize the network bandwidth
Stable operate performance under difficult environments
The ISW-621 / ISW-621S15 provide a high level of immunity against 
electromagnetic interference and heavy electrical surges which are usually 
found on plant floors or in curb side traffic control cabinets. Being able to 
operate under the temperature range from -10 to 60 Degree C coupled 
with hazardous location certification (Class 1 Division 2), the ISW-621 
/ ISW-621S15 can be placed in almost any difficult environment. The 
ISW-621 / ISW-621S15 also possess an integrated power supply source 
with wide range of voltages (12 to 48V DC) for worldwide high availability 
applications requiring dual or backup power inputs.
Robust Switch performance
The ISW-621 / ISW-621S15 each provides 4 10/100Base-TX Ethernet 
ports and 2 100Base-FX optic-fiber SC interfaces, and boasts a high 
performance switch architecture that is capable of providing non-blocking 
switch fabric and wire-speed throughput as high as 1.2Gbps. With 2K 
MAC Address table, they offer wire-speed packets transfer performance 
without risk of packet loss. The Flow Control function allows the ISW-621 
/ ISW-621S15 for fast and reliable data transfer.
• Prevents packet loss with back pressure (Half-Duplex) and IEEE 
802.3x PAUSE frame flow control (Full-Duplex)
• Backplane (Switching Fabric): 1.2Gbps
• Integrated address look-up engine, support 2K absolute MAC 
addresses
• 1 Mbit on-chip frame buffer
• Automatic address learning and address aging
• CSMA/CD Protocol
INDUSTRIAL CASE / INSTALLATION
• IP-30 Metal case / Protection
• DIN Rail and Wall Mount Design
• 12 to 48V DC, redundant power with polarity reverse protect 
function and connective removable terminal block for master 
and slave power
• Supports EFT protection 6000 VDC for power line 
• Supports 6000 VDC Ethernet ESD protection
• -10 to 60 Degree C operation temperature 
Data Sheet
1
 

ISW-621 
ISW-621S15
Applications
Industrial area Switch for data collect and forward
The ISW-621 / ISW-621S15 equip with 4 10/100Mbps ports that offers auto MDI / MDIX feature, 2 100Base-FX optic-fiber SC interfaces, 1.2Gbps 
non-blocking switch fabric, and the 2K MAC Address table so that they can perform wire-speed packets transfer without risk of packet loss. The 
ISW-621 / ISW-621S15 with the slim type IP 30 metal shape is ideal for most Heavy Industrial demanding environments. 
Fiber Switch
ICA-601
ISW-621S15
I/O Device
Subway 2
100Base-TX UTP
100
100Base-FX Fiber-optic
I/O
DI/DO
15km
I/O
I/O
ICS-2100
I/O
I/O
100 100
Control Center
PLC
ISW-621S15
ICA-310
Subway 1
100
ISW-621S15
15km
15km
ICA-525
ROBOT
Robot
Maintenance Shop
ICS-2100
I/O
Serial over Ethernet 
device
I/O
PLC
I/O
Robot
ROBOT
Data Sheet
2
PLANET Technology Corporation
11F, No. 96, Min Chuan Road, Hsin Tien, Taipei, Taiwan, R.O.C. 
Tel: 886-2-2219-9518   Fax: 886-2-2219-9528 
Email: sales@planet.com.tw   www.planet.com.tw 
VoIP Gateway: vip.planet.com.tw
PLANET reserves the right to change specications without prior notice. All brand names and trademarks are property of  
their respective owners. Copyright © 2008 PLANET Technology Corp. All rights reserved.
 

Specification
Product 4-Port 10/100Base-TX + 2-Port 100Base-FX Industrial Fast Ethernet Switch 
Model ISW-621 ISW-621S15
Hardware Specification 
Copper 
Optical 
Dimension (W x D x H) 135 x 97 x 32 mm 
Weight  442g
Power Requirement 
Power Consumption / Dissipation  11.6 Watts / 40BTU 
Installation DIN rail kit / wall mount ear 
Alarm
Switch Specification
Switch Processing Scheme  Store-and-Forward 
Address Table  2K entries 
Buffer  1Mbit
Flow Control 
Switch Fabric 1.2Gbps 
Throughput (Packet Per Second) 0.89Mpps @ 64Bytes
Standards Conformance
Standards Compliance 
Temperature 
Humidity Operating
Regulation Compliance  FCC Part 15 Class A, CE
Stability Testing
Ports
Cable
Port 
Cable 
Mode 
Distance 
Frequency 
Launch Power 
Receive Sensitivity 
Max. Input Power 
4 x 10/100Base-TX, Auto-negotiation, Auto-MDI/MDI-X 
10Base-T : 2-pair UTP Cat. 3, 4, 5 cable (100meters, max.) 
100Base-TX : 2-pair UTP Cat. 5 cable (100meters, max.) 
2 x 100Base-FX 
50/125µm fiber 
Multi-mode 
2km 
1310nm 
Max. -14dBm, Min. -19dBm
-34.5dBm
-14dBm
12~48V DC, 
Redundant power with polarity reverse protection function
Provides one relay output for power fail 
Alarm Relay current carry ability: 1A @ DC 24V
Back pressure for half duplex 
IEEE 802.3x Pause Frame for full duplex
IEEE 802.3 Ethernet, 10Base-T 
IEEE 802.3u Fast Ethernet, 100Base-TX, 100Base-FX 
IEEE 802.3x Full-duplex flow control 
Operating: -10~60 Degree C 
Storage: -40~85 Degree C 
Operating: 5~90%, 
Storage: 5~90% (Non-condensing)
IEC60068-2-32(Free fall) 
IEC60068-2-27(Shock)  
IEC60068-2-6(Vibration)
9/125µm fiber 
Single-mode 
15km 
1310nm 
Max. -7dBm, Min. -20dBm
-28dBm
-8dBm
ISW-621 
ISW-621S15
Ordering Information
ISW-621 4+2 100FX Port Multi-mode Industrial Ethernet Switch - 2km (-10~60 Degree C operate temperature) 
ISW-621S15 4+2 100FX Port Single-mode Industrial Ethernet Switch - 15km (-10~60 Degree C operate temperature)
Related Products
ISW-511 4+1 100FX Port Multi-mode Industrial Ethernet Switch - 2km (-10~60 Degree C operate temperature) 
ISW-511S15 4+1 100FX Port Single-mode Industrial Ethernet Switch - 15km (-10~60 Degree C operate temperature) 
ISW-511T 4+1 100FX Port Multi-mode Industrial Ethernet Switch - 2km (-40~75 Degree C operate temperature) 
ISW-511TS15 4+1 100FX Port Single-mode Industrial Ethernet Switch - 15km (-40~75 Degree C operate temperature) 
ISW-621T 4+2 100FX Port Multi-mode Industrial Ethernet Switch - 2km (-40~75 Degree C operate temperature) 
ISW-621TS15 4+2 100FX Port Single-mode Industrial Ethernet Switch - 15km (-40~75 Degree C operate temperature)
Data Sheet
3
PLANET Technology Corporation
11F, No. 96, Min Chuan Road, Hsin Tien, Taipei, Taiwan, R.O.C. 
Tel: 886-2-2219-9518   Fax: 886-2-2219-9528 
Email: sales@planet.com.tw   www.planet.com.tw 
VoIP Gateway: vip.planet.com.tw
PLANET reserves the right to change specications without prior notice. All brand names and trademarks are property of 
their respective owners. Copyright © 2009 PLANET Technology Corp. All rights reserved.
02-09 C-ISW621