Related FAQ: Can the Compax3 be used at 24volts? Or other dc voltage? (with video)
Yes. All Compax and Compax3 products can take a DC voltage instead of AC voltage input. All drives rated for 240 V input can be supplied up to 340 VDC and all drives rated for 480 V input can be supplied up to 680 VDC.
For the CPX1000SL, 2500S and C3 xxxx V2 products use the following installation connections.
|CPX1000SL||CPX2500S||C3 xxxx V2|
|DC +||X2/1 L||X2/1 L1||X1/1 L|
|DC -||X2/2 N||X2/2 L2||X1/2 N|
|PE||X2/3 PE||X2/3 PE||X1/3 PE|
For the CPX4500S, 8500S, NMD10, NMD20 and C3 xxxx V4 products use the following installations connections.
|CPX4500S/8500S||NMD10/20||C3 xxxx V4|
|DC +||X2/1 L1||X2/1 L1||X2/4 +HV|
|DC -||X2/2 L2||X2/2 L2||X2/5 -HV|
|PE||X2/3 PE||X2/3 PE||X2/3 PE|
For the C3S running on DC power, the internal mains filter has no function, so ensure that the DC power supply includes a DC filter. When the DC voltage is connected to X2, the drive can be supplied up to 680V without any derating. Otherwise, connecting to X1 (using L1 and L2 instead of +HV and -HV) the maximum allowed DC voltage is max 500V. The Compax3's overvoltage protection and regenerative circuitry is active when powering through either X1 and X2.