6 NX-320E Power SupplyVI. TERMINAL DESCRIPTIONSTable VI:1Terminal DescriptionDATAConnect to the NX-8 / NX-8E / NX-8-CF control panel Data terminal. This terminal is theincoming data-signaling terminal to the power supply module. The maximum total wire runfrom the control panel to all devices, including the NX-320E is 2500 feet.COM Connect to the NX-8 / NX-8E / NX-8-CF control panel COMMON terminal. This terminalsupplies the common side of the power to the NX-320E board.POS Connect to control panel AUX POWER + terminal. This terminal supplies power to the NX-320E board.DATA This terminal is the outgoing data-signaling terminal for buss extension. The maximum totalwire run from the NX-320E to all outgoing devices is 2500 feet.COM Common terminal for any device powered from the NX-320E.OUT A Programmable output current limited to 1.9 Amps.OUT B Programmable output current limited to 1.9 Amps. COM Common terminal for any device powered from the NX-320E.OUT C Programmable output current limited to 1.9 Amps. BELL + Positive of bell output current limited to 2.5 Amps, but 600mAfor UL applications. Connect as in diagram on page 7.BELL - Negative of bell output current limited to 2.5 Amps, but 600mAfor UL applications. Connect as in diagram on page 7.The total current of theNX-320E is 2.5 Amps. TAM This is an optional tamper terminal. To use this feature, connect the normally closed tamperswitch between this terminal and COM. If switch 4 is off, this feature is not used.EARTH Earth Ground.AC AC Input. Connect to a 16.5V 50 VA Class II UL approved transformer.AC AC Input. Connect to a 16.5V 50 VA Class II UL approved transformer. Total of 1.9 Amps between outputs A,B,C. Total of 2.5 Amps between Bell and outputs.VII. WIRING REQUIREMENTSTable VII:1LENGTH WIRE GAUGE(IN FEET) WHEN CONNECTEDTO NX-8 / NX-8E / NX-8-CF400 24500 241000 242000 22For UL COMMERCIAL FIREinstallations, a minimum of18 AWG shall be used for allfield-wiring applications,regardless of this chart.2500 20