User Manual

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Auto-Negotiation and Speed Sensing
All of the IMC-21GA’s RJ45 Ethernet ports independently support
auto-negotiation for transmission speeds of 10 Mbps, 100 Mbps , and
1000 Mbps in operations according to 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 or 1000 Mbps.
Auto-negotiation takes place when an RJ45 cable connection is made, and
then each time a LINK is enabled. The IMC-21GA advertises its capability
for using 10 Mbps, 100 Mbps, or 1000 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 an
agreement to operate at a speed of 10 Mbps, 100 Mbps, or 1000 Mbps.
If the IMC-21GA’s RJ45 Ethernet port is connected to a non-negotiating
device, it will default to a speed of 10 Mbps and half-duplex mode, as
required by the IEEE 802.3u standard.
Specifications
Technology
Standards
IEEE 802.3, 802.3u, 802.3ab, 802.3z, 802.3az
Interface
RJ45 Port
10/100/1000BaseT(X), RJ45 connector
Fiber Port IMC-21GA-SX/LX-SC: 100/1000Base-SX/LX, SC
connector
IMC-21GA: 100/1000BaseSFP slot
LED Indicators
Power (PWR1, PWR2), G1 (TP Port), G2 (Fiber
Port)
DIP Switch
The following are DIP-switch selectable:
Fiber port’s connection speed (FX Speed),
Energy-Efficient Ethernet (EEE),
Link Fault Pass-Through (LFP)
Fiber Optics
Multi-mode
(IMC-21GA-SX-SC)
Single mode
(IMC-21GA-LX-SC)
Distance, km
0.5
10
Wavelength, nm
850
1310
Min. Tx Output, dBm
-10
-9
Max. Tx Output, dBm
-3
-3
Sensitivity, dBm
-20
-21
Power Requirements
Input Voltage
12 to 48 VDC (10 to 60 VDC)
Input Current
285 mA @ 12 VDC; 156.0 mA @ 24 VDC
Connection
Removable 4-contact screw-on terminal block
Overload Current
Protection
1.5 A
Reverse Polarity
Protection
Present
Physical Characteristics
Housing
IP30 protect, metal case
Dimensions
30 × 115 × 70 mm (1.19 x 4.53 x 2.76 in)
Weight
170 g
Installation
DIN-rail mounting