TREND NX Variable Speed Drives - Manual (Page 81)

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’