Nx Networks NX series user manual 4486, Digital input signal inversions, +24V Ground

44(86) Cabling and connections

6.2.2.1Digital 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 (0 V). See Figure 6-18.

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

+24V

Ground

DIN1

DIN2

DIN3

DIN1

DIN2

DIN3

Ground

CMA

+24V

CMA

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

Figure 6-18. Positive/Negative logic

6.2.2.2Jumper selections on the NXOPTA1 basic board

The user is able to customise the functions of the frequency converter to better suit his needs by selecting certain positions for the jumpers on the NXOPTA1 board. The positions of the jumpers determine the signal type of analogue and digital inputs.

On the A1 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 6-20.

Figure 6-19. Jumper blocks on NXOPTA1

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