Checkpoint LAB USB-RS232 Manuel d'utilisateur télécharger pdf (Page 19)

PRACTICAL CONSIDERATIONS

1. Current, Voltage Needs

• Gauge of wire, insulation

2. Customer’s Use and Abuse

• Connect/ disconnect needs

• Routing, protecting

• Mounting, vibration and stability

• Strained or solid

• Gold versus Tin; environment, corrosion, current rating

• Instrumentation quality for long life

3. Color Coding for ease in Debug and future use.

As an example;

1. Red Vcc/Vdd

2. Black Grd/ Vss

3. Orange, color by major node.

STEP 7 CONNECTORS/ PINS/ TP’S/ LEDS

Add all needed I/O connectors to your schematic(s).

1. Connect/ disconnect needs – screw terminators,

push type

2. Major Manufactures: Amp, Molex

3. Location

• between assemblies

• interface to other projects (collaborate with other teams)

• instrumentation

4. Get crimp compatibility to pin manufacturers (style

and gauge).

5. Pins: crimp versus solder

6. Current rating rule of thumb is 10x. i.e. 100 ma

purchase 1 amp pins

7. Types; ribbon, D shell, PCB mount

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Checkpoint LAB USB-RS232 Manuel d'utilisateur Page 19