ELECTRICAL INSTALLATIONWe recommend a qualified electrician perform the needed electrical connections to ensure proper operation of the product. These connections include grounding the cabinet, connecting the product to a power source, installing the SL-320 or the control cable, and connecting the control console. Ground Connection The National Electrical Code requires this product (an electric sign) to be grounded. Grounding the cabinet helps the electronics operate properly and helps minimize damage if it is struck by lightning. Metal posts do not provide an adequate ground path. The following steps describe how to ground the scoreboard:
Power Connections The model 3050 requires 120 VAC service at the Main Power terminal block to operate properly. Maximum power consumption of Model 3050: 48 Watts. Make sure that power cable is rated for this electrical load. Install the power cable in conduit. Avoid running the power cable in close proximity to the control cable. The following steps describe how to connect the model 3050 to the power source:
Install a power disconnect that isolates all current carrying conductors on one of the posts below the cabinet (not the ground conductor). If a secondary switch is installed near the scorekeeper’s table, it should also isolate these conductors. Place the power disconnect in the OFF position between games to help protect the model 3050 from lightning damage. A power disconnect on the mounting post also provides a convenient way of turning the model 3050 off during maintenance or repairs. SL-320 The SL-320 is designed to eliminate the control cable between the scoreboard and the control console on Electro-Mech Scoreboard MM and MP series scoreboards as well as all outdoor LED products. If you have purchased this accessory, disregard the section of this manual titled Control Cable Installation. Refer to the SL-320 OWNER’S HANDBOOK for installation instructions. Serial Data Output Connections Customers who have purchased a set of delay of game timers can provide the other delay of game timer or a scoreboard with serial data from this delay of game timer. This connection is an alternative to providing serial data from the control console via the control cable or a SL-320. The following steps describe how to transmit serial data from this delay of game timer to the other delay of game timer or a scoreboard:
Control Cable Installation The control cable connects the scoreboard to the control console. Install the control cable in conduit. If the cable is ever damaged, it is easier and less expensive to replace a cable in conduit. A small junction box with a ¼” stereo jack mounted on the face plate is attached to the control cable at the point of operation of the scoreboard. This junction box should be securely mounted in a clean, dry area within ten feet of the rear of the control console. Most customers order the control cable with the junction box attached. Some customers prefer to attach the junction box after the cable is installed. Those customers must solder the control cable to the ¼” stereo jack. Figure 10 shows the control cable wire connection points on the rear of the ¼” stereo jack.
The following steps describe how to connect the control cable to the delay of game timer:
Control Console Connections The 10 ft. extension cable has two molded ¼” stereo plugs attached to it. It is used to connect the control console to the junction box. The following steps describe how to connect the control console:
Control Console Safety Warning This product is equipped with a 3-wire grounding type plug, a plug having a third (grounding) pin. This plug will only fit into a grounding-type power outlet. This is a safety feature. If you are unable to insert the plug into the outlet, contact a qualified electrician to replace your obsolete outlet. Do not defeat the purpose of the grounding-type plug.
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