NS-208A/NSM-208A User’s Manual (Version 1.0, Aug/2011) --------------- 1
NS-208A/NSM-208A
Unmanaged 8-Port Industrial 10/100 Mbps Ethernet Switch
Introduction
The NS-208A/NSM-208A has 8 Ethernet ports that
support 10/100 Base-TX, with a 10/100M auto
negotiation feature and auto MDI/MDI-X function.
All Ethernet ports have memory buffers that
support the store-and-forward mechanism, which
assures that data can be transmitted properly. The
NS-208A/NSM-208A supports advanced network
standards to optimize network performance,
reduce maintenance costs, and secure network
safety.
The flow control mechanism is also negotiated.
There is link/data rate LEDs for each port to aid
troubleshooting. Port connectors are shielded RJ-
45.
Features
Automatic MDI/MDI-X crossover for plug-and-play
Each port supports both 10/100Mbps speed auto negotiation
Store-and-forward architecture
Full duplex IEEE 802.3x and half duplex backpressure flow control
Operating temperatures, –40 ~ +75°C
DIN-Rail
Specifications
Models
NS-208A
NSM-208A
Technology
Standards
IEEE 802.3, 802.3u, 802.3x
Processing Type
Store & forward, wire speed switching
MAC Addresses
2048
Memory Bandwidth
2 Gbps
Frame buffer memory
512 Kbit
Flow Control
IEEE802.3x flow control, back pressure flow control
Interface
RJ45 ports
10/100 Base-T(X) auto negotiation speed, F/H duplex mode, and auto MDI/MDI-X
connection
LED Indicators
Power, Link/Act , 10/100M
Ethernet Isolation
1500 Vrms 1 minute
Power Input
Input Voltage Range
+12 ~ +48 VDC
Power consumption
0.2 A@ 24 VDC
Protection
Power reverse polarity protection
Connection
3-Pin Removable Terminal Block
Mechanical
Casing
Plastic (Flammability UL 94V-0)
Metal (IP30 Protection)
Dimensions (W x L x H)
31 mm x 157 mm x 113 mm
25 mm x 168 mm x 119 mm
Installation
DIN-Rail
Environmental
Operating Temperature
-40 °C ~ +75 °C
Storage Temperature
-40 °C ~ +85 °C
Ambient Relative Humidity
10% ~ 90% RH, non-condensing
