Honeywell HC900 - Page 69

Revision 6 HC900 Process & Safety Controller User and Installation Manual 55
21 April 2017
How to make Ethernet cables
Ethernet cable (shielded Cat 5) contains 4 twisted pairs of wires and a drain wire. Each pair consists of a
solid color wire and a color wire with a white stripe.
1. Hold the cable ends and RJ45 connectors side by side as shown:
2. For straight through cable, arrange wires as shown in the following table. Wires go “straight through”,
no crossovers.
Straight-through cable assembly
Cable left end
Left to right
Wire color/pin number
10Base-T / 100Base-T
Signal Description
Cable right end
Left to right
Wire color/pin number
white/orange/1
Tx +
white/orange/1
Orange/2
Tx -
Orange/2
white/green/3
Rx +
white/green/3
Blue/4
Unused
Blue/4
white/blue/5
Unused
white/blue/5
Green/6
Rx -
Green/6
white/brown/7
Unused
white/brown/7
Brown/8
Unused
Brown/8
3. Crimp an RJ45 connector to each cable end. To ensure reliability do not untwist the pairs any more than
necessary to complete the crimp connection. Use care to ensure that the cable drain wire is securely
connected to the shield of the RJ45 connector when the cable is crimped. Reference the
manufacturer’s instructions.