# Adding Ethernet devices (OS 450 Compact only)

The Omniscan 450 Compact has a built in Ethernet switch, and can act as a hub for up to 2 additional Ethernet devices. Instructions for adding anther device are below.

1. Remove the 12 Torx screws from the bottom plate using a T10 Torx driver. Loosen each screw a little at a time, going around to each screw several times.

<figure><img src="/files/ndENVLJulL0grhQVTNwu" alt=""><figcaption></figcaption></figure>

2. Remove the 4 screws securing the circuit board using a 2.5mm hex driver.

<figure><img src="/files/2CK4yuzk61CXoDxDCBHb" alt=""><figcaption></figcaption></figure>

3. Remove one of the blank penetrators using a 16mm wrench (or an M10 bulkhead wrench from Blue Robotics as shown).&#x20;

<figure><img src="/files/EpGFsWTrowzBmHHGKZAX" alt=""><figcaption></figcaption></figure>

4. Prepare the additional Ethernet cable. The Omniscan Compact's Ethernet connection uses a 4-pin JST GH connector, while the power leads should be stripped and tinned about 5mm. The penetrator holes in the OS450 Compact case accept Blue Robotics M10 WetLink penetrators, but other M10 penetrators may work as well.

<figure><img src="/files/44m7O2Qp4J593HgOhSBh" alt=""><figcaption></figcaption></figure>

5. Install the additional Ethernet cable with a greased o-ring and tighten the cable's penetrator while holding the nut on the other side (one of the holes in the OS 450 Compact case is already threaded, so no nut is required).

<figure><img src="/files/6kterAEoyHXEiRmrw72f" alt=""><figcaption></figcaption></figure>

6. If the Omniscan's cable is connected to the "POWER IN" JST jack, remove the JST from the "POWER IN" jack.

<figure><img src="/files/R7Xs97GFMUy3TQM7Lhor" alt=""><figcaption></figcaption></figure>

7. Cut off the JST connector, then strip and tin the red and black wires about 5mm.&#x20;

<figure><img src="/files/XnejgzyjvlhmdDQXr1Cz" alt=""><figcaption></figcaption></figure>

8. Install the power in wires into the terminal block in the positions labeled "POWER IN", red to "+" and black to "-", using a small flat-head screwdriver.&#x20;

<figure><img src="/files/NxT2hMkCboiMS68NidRb" alt=""><figcaption></figcaption></figure>

9. Install the 4-pin JST GH connector of the additional Ethernet cable into any of the open JST jacks labeled "ETHER". Install power leads into any open position of the terminal block labeled "POWER OUT" using a small flat-head screwdriver.

<figure><img src="/files/qXCIle0RVMf4M4ECBreY" alt=""><figcaption></figcaption></figure>

10. Reinstall the PCB

<figure><img src="/files/c6X0cAI1t7iwdS0juoqw" alt=""><figcaption></figcaption></figure>

11. Reinstall bottom plate. Tighten each screw a little at a time, going around to each screw several times. Ensure that all the screws are hand tight.

<figure><img src="/files/WoGxkx3nZyPtbWU1XN7j" alt=""><figcaption></figcaption></figure>


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