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HowTo: Build a 16 Ch PicDimmed Renard with SSRs onboard!
( Dave Johnson)
Step 26 : RJ45 Interface
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| | Clarification: This design will work just fine with Cat5e or Cat5. But the color scheme demonstrated below is for Cat5 NOT Cat5e. Just make sure you follow the NUMBERS if you are doing Cat5e. The colors are only correct for CAT5.
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For this design:
Pair 1 = RS485 B is Blue(4), RS485 A is Blue-white(5)
Pair 2 = Orange(6) and Orange-White(3) are spares. (ZC in the future?) I have placed traces on the board such that a solder ball could be added to make these additional power and ground if needed. They probably will not be necessary given the low DC power consumption of the board. But you could solder them to make this board 100% RJ45 pin-out compatible with other co-op boards. In the easily modified case, Pin 3 becomes VCC, Pin 6 becomes ground. Even without this solder ball this board should still work in series with other Renard boards, it would just remove one of the power supply pins from the picture downstream from this board if you didn’t make the change. In short: these could be used for anything you like. Look for via’s labeled “3” and “6” near both RJ45 connectors.
Pair 3 = Green-white(1) and green(2) for ground (intuitive)
Pair 4 = Brown(8) and Brown-white(7) for >9 VDC < 15VDC (Input to 5V regulator). The reason the <15VDC rule is imposed is due to the use of the ESD protection MOV device listed in the parts list. If you use this MOV it has a maximum continuous operating voltage of 18VDC, thus I suggest never going over 15VDC continuously applied via the RS45 interface.
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