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The 1747-NP1 power supply module is a crucial element for the Allen-Bradley SLC 500 system, specifically designed to support DH-485 network communication via the 1747-AIC link coupler. This wall-mounted module operates with an input voltage of 120 Volts AC, providing necessary power for the network connections and ensuring 1500 Volts of electrical-optical isolation between the processor and peripherals. Ideally used with Belden #3106A or #9842 shielded cables, the 1747-NP1 can manage connection lengths up to 1219 meters, effectively handling power requirements up to 190 milliamps at 24 Volts DC when peripheral devices are linked.