Led Lighting Spd Design Installation Guide Page 15 LED Lighting SPD Design & Installation Guide

2015 Littelfuse LED Lighting SPD Module Design and Installation Guide www.littelfuse.com LED Lighting Surge Protection Modules Design and Installation Guide LSP10 Wiring Guide, Parallel Connection with End-of-Life Indication Apply series-connected models of LSP10 Series thermally protected varistor modules (as indicated by an S suffix in the part number) as parallel connections in the lighting fixture. This turns the output wires of the series-connected SPD modules into end-of-life indication wires. L N G SPD L N/G or LED Module L N + - LED normally on Parallel Connection With LED indicating SPD status - ON (green): SPD is online - OFF: SPD needs replacement LSP10xxxS AC/DC Power Supply R Figure 15. Connect a current limiting resistor and a green LED to form an external indicator of module status. When the green LED is on, the module is working normally. When the green LED is off, the module is disconnected from the power circuit, so it is no longer providing surge protection to downstream devices. It must be replaced with a new one. LSP05 Wiring Guide, Parallel Connection with End-of-Life Indication L N G SPD L N/G or AC/DC Power Supply LED Module L N + - R LED normally on Parallel Connection With LED indicating SPD status - ON (green): SPD is online - OFF: SPD needs replacement LSP05xxxPM R1 R2 R3 NC L N G SPD L N/G or LED Module L N + - R LED normally off Parallel Connection With LED indicating SPD status - OFF: SPD is online - ON (red): SPD needs replacement LSP05xxxPM R1 R2 R3 AC/DC Power Supply Figure 16. Apply parallel-connected models of LSP05 Series thermally protected varistor modules (as indicated by a PM suffix in the part number) and connect indication wires to a current-limiting resistor and a LED indicator. Either a normally-on green LED or a normally-off red LED could be selected as the LED indicator. Over-voltage Testing in UL 1449 and IEC 61643-11 (continued) 15

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