Moxa IMC-21-M-SC [10/11] Dual speed functionality and switching
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Moxa IMC-21-M-SC [10/11] Dual speed functionality and switching

Moxa IMC-21-S-SC [10/11] Dual speed functionality and switching
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Dual Speed Functionality and Switching
Moxa Industrial Media Converter’s 10/100 Mbps switched RJ45 port auto
negotiates with the connected device for the fastest data transmission
rate supported by both devices. All models of Moxa Industrial Media
Converter are plug-and-play devices, so that software configuration is not
required during installation, or for maintenance. The half/full duplex
mode for the switched RJ45 ports is user dependent and changes (by
auto-negotiation) to full or half duplex, depending on which transmission
speed is supported by the attached device.
Auto-Negotiation and Speed Sensing
Moxa IMC-21 series’ RJ45 Ethernet port supports auto-negotiation in
10BaseT and 100BaseT(X) modes, with operation governed by the IEEE
802.3u standard. This means that some nodes could be operating at 10
Mbps, while at the same time, other nodes are operating at 100 Mbps.
Auto-negotiation takes place when an RJ45 cable connection is made, and
then each time a LINK is enabled. Moxa Industrial Media Converter
advertises its capability for using either 10 Mbps or 100 Mbps
transmission speeds, with the device at the other end of the cable
expected to advertise similarly. Depending on what type of device is
connected, this will result in agreement to operate at a speed of either 10
Mbps or 100 Mbps.
If a Moxa Industrial Media Converter RJ45 Ethernet port is connected to a
non-negotiating device, it will default to 10 Mbps speed and half-duplex
mode, as required by the IEEE 802.3u standard.
Specifications
Technology
Standards
IEEE802.3, 802.3u, 802.3x
Interface
RJ45 Port
10/100BaseT(X)
Fiber Port
100BaseFX (SC, ST connectors available)
LED Indicators
Power, 10/100M (TP port), 100M (Fiber port),
FDX/COL (Fiber port)
DIP Switch
TP port’s connection speed and Half/Full duplex
mode and Force/Auto mode are DIP switch
selectable
Fiber connection’
s Half/Full duplex mode is DIP
switch selectable
Link Fault Pass-Through (LFP) is also DIP
switch selectable
Fiber Optics
Multi-mode
(100BaseFX)
Single mode
(100BaseFX)
Distance, km
5
40
Wavelength, nm
1300
1310
Min. Tx Output, dBm
-20
-5
Max. Tx Output, dBm
-14
0
Sensitivity, dBm
-34 to -30
-36 to -32

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