1128 CONNECTIONS AND MAINTENANCENew2001n Power supply connectionsCAUTION: IC-GM651 should be connected to the DCpower supply through the PS-250 dc - dc power supply,sold by the set with the IC-GM651, when it is operated.Before connecting the DC power cable, make sure thepower is OFF, and the DC power cable polarity is correct.• Red : positive + terminal• Black : negative − terminalBE SURE to connect the supplied DC power cable only,and DO NOT extend the cable length.The PS-250 dc - dc power supply, sold by the set with theIC-GM651, converts the input voltage (10.8 to 31.2 V DC)from the DC power supply, then provides 12.5 V DC, 5.3 A ofthe continuous power to the transceiver.The optional PS-240 ac-dc power supply converts the inputvoltage (85.0 to 264.0 V AC: 47 to 63 Hz; nominal operatingfrequency 50 Hz) from the AC outlet, then provides 14.5 VDC, 7 A of the continuous power to the PS-250.D Connecting to the DC power supply through thePS-250GNDGND12 V or 24 VbatteryPS-250IC-GM651DC power cable(Supplied withthe PS-250)DC power cable(Supplied withthe IC-GM651)Terminal guardKeep the terminal guard attachedafter connecting cables.
