Connect Tech Blue Heat/Net User Manual download pdf (Page 89)

Connect Tech Blue Heat/Net User Manual

Revision 0.17 89

Loopback Connectors:

Loopback connectors are useful for performing diagnostics. The following are the recommended

pinouts for creating loopback connectors for Blue Heat/Net products.

Figure 51: Loopback connectors, DB-9 and RJ-45

DB-9: For making DB-9 Female loopback connectors we recommend using solder cup DB-9

connectors and 28 AWG solid core wire.

RJ-45: For making RJ-45 loopback connectors, we recommend using 8 pin RJ-45 connectors

and about 2 inches of CAT 5 cable. You will have to crimp the wires from the CAT 5 cable into

the RJ-45 plug, then strip and solder the wires to match the above loopback pinout.

RS-422/485 Examples:

RS-422/485 Wiring Tips:

RS-422/485 wiring must always use twisted pair cabling.

For applications which require long cable lengths (100M) and higher baud rates (115.2kbps) we

recommend using “low capacitance computer cabling”, or cabling specifically for RS-422/485

applications.

For maximum reliability in noisy environments we recommend using shielded cabling. The

drain wire of the shield should be connected at one end of the cable only. We recommend the

shield at the RS-485 device end.

4-wire (full duplex, “RS-422 mode”) Wiring hardware flow control

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Connect Tech Blue Heat/Net User Manual Page 89