Modular Plug Assembly

[mitchell]

The modular plug that connects a sensor to the M2 mote may sometimes require a replacement. This article includes instructions on installing a modular plug. There are two types of modular plugs that can be distinguished by the number of pins in the plug.

Fig. A: 5-pin; Fig. B: 6-pin

Modular Plug 6-pin

1. Insert plug component over sensor cable. Figure 1
2. Insert the red sense wire into the open block ‘1’ then tighten with a phillips head screwdriver. Figure 2
3. Insert the green sense wire into the open block ‘N’ then tighten with a phillips head screwdriver. Figure 3
4. Slide the inner cover over the wires and screw tight to the end of the plug. Figure 4
5. Slide the inner gasket into the back of the plug. Figure 5
6. Tighten the rear plastic nut until it seats firmly over the cable. Figure 6
   
   

Modular Plug 5-pin

Installation of a 5-pin plug works similarly to the original 6-pin design:

1. Insert plug component over sensor cable. Figure 1 above
2. Insert the red sense wire into the open block between ‘1 & 5’ (Fig. C) then tighten with a phillips head screwdriver.
3. Insert the green sense wire into the open block between ‘3 & 4’ (Fig. C) then tighten with a phillips head screwdriver. Figure 3 above
4. Slide the inner cover over the wires and screw tight to the end of the plug. Figure 4 above
5. Slide the inner gasket into the back of the plug. Figure 5 above
6. Tighten the rear plastic nut until it seats firmly over the cable. Figure 6 above

Another way to view the plug assembly is by viewing the sides of the plug:

• Red = L or ‘live’
• Green = Ground

Note: There is a jumper wire that is used between ‘1 & 2’ for the battery. This cable should not be tampered with.