ProSoft Technology RLX2-IFH9E - Manual (Page 42)

Installing the Radios RLX2-IFHxE ♦ Industrial Wireless
User Manual Industrial Frequency Hopping Ethernet Radios
Page 42 of 81 ProSoft Technology, Inc.
May 28, 2014
2.2.1 Ethernet Cable Specifications
The recommended cable is category 5 or better. A category 5 cable has four
twisted pairs of wire that are color-coded and cannot be swapped. The module
only uses two of the four pairs when running at 10 MBit or 100 MBit speeds. All
eight wires are used when running at 1000 MBit speeds.
Category 5e or better cable is recommended for 1000 MBit speeds.
The Ethernet port on the radio is Auto-Sensing. You can use either a standard
Ethernet straight-through cable or a crossover cable. The module detects the
cable type and use the appropriate pins to send and receive Ethernet signals.
You can connect the module to an Ethernet hub, a 10/100/1000 Base-T Ethernet
switch, or directly to a PC.
Ethernet cabling is like U.S. telephone cables but have eight conductors. Some
hubs have one input that can accept either a straight-through or crossover cable,
depending on switch position. In this case, ensure that the switch position and
cable type agree.
Refer to Ethernet Cable Configuration (page 42) for a diagram of how to
configure Ethernet cable.
2.2.2 Ethernet Cable Configuration
Note: The standard connector view shown is color-coded for a straight-through cable.
Crossover cable Straight- through cable
RJ-45 PIN RJ-45 PIN
1 Rx+ 3 Tx+
2 Rx- 6 Tx-
3 Tx+ 1 Rx+
6 Tx- 2 Rx-
RJ-45 PIN RJ-45 PIN
1 Rx+ 1 Tx+
2 Rx- 2 Tx-
3 Tx+ 3 Rx+
6 Tx- 6 Rx-
2.2.3 Serial Port Basics
Two common serial interface standards are RS-232 and RS-485. The RS-232
protocol is an industry standard protocol while the RS-485 protocol is commonly
used in the industrial automation market.