User Manual

22
OPERATION
Connect up SRPT-30/40A to the AC Line Receptacle or External
DC Supply
CAUTION & WARNING
NEVER CONNECT THE SRPT-30/40A TO THE AC LINE AND EITHER OF THE EXTERNAL DC
SUPPLIES AT THE SAME TIME.
DOING SO MAY DAMAGE THE INTERNAL SWITCHING SUPPLY OR THE EXTERNAL DC
SUPPLY.
AC Line Operation
Position AC LINE switch to “OFF”, then plug SRPT-30/40A into a 110-120 VAC (if internal supply switched to
115) or 220-240 VAC (if internal supply switched to 230), grounded, 3-prong receptacle.
WARNING
DO NOT PLUG INTO AC WITHOUT FIRST KNOWING POSITION POWER SUPPLY SWITCH.
WARNING
THIS EQUIPMENT MUST BE OPERATED WITH A 3-PRONG, GROUNDED, 110-120 or 220-240 VAC
RECEPTACLE!
FAILURE TO USE A PROPERLY GROUNDED OUTLET COULD RESULT IN A SAFETY HAZARD
OR FAULTY EQUIPMENT PERFORMANCE.
IF AN EXTENSION CORD IS USED, IT MUST BE THE THREE-WIRE GROUNDING TYPE TO
INSURE SAFETY.
DO NOT CUT OFF THE GROUND PIN OF A 3-PRONG PLUG!!
External DC Supply (12-15 Volt) Operation
Make sure that the SRPT-30/40A is not connected to an AC line. Place the front panel AC LINE switch in the ON
position. This turns off External DC Supply (12-15 Volt) to the unit.
The external supply or battery must be capable of delivering 10 Amps if running the SRPT-40A at 50 Watts.
Connect up the unit using the Marti 585-141 12-15 VDC External Supply Cable. If choose to build your own cable then
follow the drawing on Figure 2A: Connect three positive leads of the supply to pins 6, 7, and 14 of a 15-pin female D
connector. Connect three negative leads of the supply to three ground pins (pins 1, 11, and 12) of the 15-pin female D
connector. Each of the three positive leads and each of the three negative leads should be an 18 gauge wire. You may