Compax3 Hardware - Can the Compax and Compax3 Products Take a DC Voltage Supply?

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.