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Digital input signal inversions – TREND NX Variable Speed Drives User Manual

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64 • vacon

CABLING AND CONNECTIONS

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6

OPT-A2

Terminal

Signal

Technical information

21

RO1/1

22

RO1/2

23

RO1/3

Relay output 1

Switching capacity

24VDC/8A

250VAC/8A
125VDC/0.4A
Min.switching load

5V/10mA

24

RO2/1

25

RO2/2

26

RO2/3

Relay output 2

Switching capacity

24VDC/8A

250VAC/8A
125VDC/0.4A
Min.switching load

5V/10mA

Table 6-10. Control I/O terminal signals on basic relay board OPT-A2

OPTA-3

Terminal

Signal

Technical information

21

RO1/1

22

RO1/2

23

RO1/3

Relay output 1

Switching capacity

24VDC/8A

250VAC/8A
125VDC/0.4A
Min.switching load

5V/10mA

25

RO2/1

26

RO2/2

Relay output 2


Switching capacity

24VDC/8A

250VAC/8A
125VDC/0.4A
Min.switching load

5V/10mA

28

TI1+

29

TI1–

Thermistor input

Table 6-11. Control I/O terminal signals on basic relay board OPT-A3

6.2.2.1 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 (0 V). See Figure 6-27.

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

Figure 6-27. Positive/Negative logic

+24V

+24V

DIN1

DIN2

DIN3

CMA

DIN1

DIN2

DIN3

CMA

nk6_16

Ground

Ground

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’