# RTU Power Wiring

1. Refer to the diagram RTU Interior View, which indicates where power input connections are to be made.
2. Inspect and remove any foreign materials that might create short circuits.
3. Connect the black (negative) battery lead to the negative terminal on the gel-cell battery. This battery lead was disconnected in preparation for product shipment.
4. Most often the product is configured to be powered by 120 VAC and will therefore be shipped with an AC power cord already wired into the unit. This power cord may simply be plugged into a standard grounded 15 Amp.120 VAC outlet. If power to the product needs to be wired via conduit the power cord may be disconnected and removed. The Line, Neutral, and Ground wires should be connected to the TS1 terminal strip at the L, N, and GND, respectively.
5. If primary power for the product is 48 or 125 VDC, carefully connect the +, - and ground (earth) leads to Terminal Strip TS1 on the DC/DC Power Converter Module. Be sure that the voltage connected matches with the voltage indicated on the Module's label, and that the +/- polarities are correct.
6. If primary power for the product is to be a 12 VDC wall adapter or other 12VDC source the product must be ordered from the factory so configured. (The product needs to be assembled with different primary power components.) Connect the 12 VDC positive lead to the TS1 terminal labeled “L” and the negative lead to the TS1 terminal labeled “GND”.
7. Regardless of the ultimate source of the 12 VDC power, it is imperative to connect the ground terminal on TS1 to a good electrical ground, in order for the product's substantial built-in surge protection to be effective.

Note: The act of applying primary power will automatically turn the product on. For the time being, turn it off again by pressing the ON/OFF key on the front panel.

Important Note: A good ground (earth) connection is important in order for the substantial electrical surge protection built into the product to work effectively. This ground may be associated with the AC or DC power source, or it may instead be a good ground connection to the grounded chassis of nearby electrical equipment, independent of the AC or DC supply source.