J. T. Eaton LCX9000 user manual Digital Input Signal Inversions, 10 Positive/Negative Logic

LCX9000 Liquid-Cooled Drives User Manual

January 2007

Digital Input Signal Inversions

The active signal level depends on which potential the common inputs CMA and CMB (terminals 11 and 17) are connected to. The alternatives are either +24V or ground (0V). See Figure 4-10.

The 24V control voltage and the ground for the digital inputs and the common inputs (CMA, CMB) can be either internal or external.

	1	2	3
+24V		Ground
	DIN1		DIN1
	DIN2		DIN2
	DIN3		DIN3
Ground	CMA	+24V	CMA

Figure 4-10: Positive/Negative Logic

Positive logic (+24V) is the active signal) = the input is active when the switch is closed.

Negative logic (0V is the active signal = the input is active when the switch is closed.

Requires setting of jumper X3 to position “CMA/CMB isolated from ground.”

Jumper Selections on the OPT-A9 Basic Board

The user is able to customize the functions of the drive to better suit his needs by selecting certain positions for the jumpers on the OPT-A9 board. The positions of the jumpers determine the signal type of analogue and digital inputs.

On the A9 basic board, there are four jumper blocks X1, X2, X3 and X6 each containing eight pins and two jumpers. The selectable positions of the jumpers are shown in Figure 4-12.

Figure 4-11: Jumper Blocks on OPT-A9

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