# Electrical Connection

Provided external connections are a 4-pin JST-GH for connection to a Blue Robotics Ethernet Switch or RJ45 adapter, and #6 spade connectors for connecting to power (10-30 Volts DC).

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A converter is also provided for adapting from the 4-pin JST-GH to a standard RJ45.

![](https://3592855831-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FHdQbBpPtUatcIjbJpCQn%2Fuploads%2FjzTZICDMJEe6gnuX85Eh%2Fimage.png?alt=media\&token=9b921904-105b-4e1c-8ffe-e41e49c2da90)

Connection to the Omniscan 450 FS and Omniscan 450 SS circuit board is made through a 4-pin JST-GH for ethernet and a pair of stripped wires for power. Pinout is shown below.

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Internal connection for the OS 450 Compact uses a 2-pin JST-GH for power as show below.

<figure><img src="https://3592855831-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FHdQbBpPtUatcIjbJpCQn%2Fuploads%2Fr0KOHQrPV7R2MGJ1BR4u%2Fimage.png?alt=media&#x26;token=9983ec6c-6ec7-4be6-921d-257aec05e327" alt=""><figcaption></figcaption></figure>

Omniscan FS internal connections to the circuit board are shown below.&#x20;

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And below are Omniscan SS connections to the circuit board.

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{% hint style="info" %}
Note: polarity of the transducer+ and transducer- wires is not critical, and some versions may have a black wire instead of a white wire.
{% endhint %}

When attaching the stripped wires to the circuit board, the wires are inserted one at a time into their respective connector. Press down on the button corresponding to the wire you wish to insert with either your finger or a flat-blade screwdriver, insert the wire until it stops, then let go of the button.