Dinverter
A
User Guide
Issue code: d2au9
50
Alternative function (1) Remote speed-reference
Signal type Unipolar current
Current range (programmable) 0 to 20mA
4mA to 20mA
20mA to 0
20mA to 4mA
Maximum operating common-mode
voltage
–5V to +10V on both terminals relative to 0V
Absolute maximum common-mode
voltage
–7V to +12V on both terminals relative to 0V
Input resistance 100Ω (termination resistor in the terminal chamber)
Resolution 10-bit (from 0 to 20mA)
Absolute accuracy ±0.6mA
Sampling period 16ms (60Hz)
Alternative function (2) Motor thermistor input
Trip threshold 3.3kΩ
Reset threshold 1.8kΩ
Recommended motor-thermistor value 250Ω (embedded in the motor by the manufacturer)
Multiple thermistors Up to six thermistors can be connected in series
Serial communications requirements
Warning
The RS485 serial communications connections in the Drive
are not isolated from the other control circuits and are
separated from the live parts by basic insulation; if the
serial communications circuit is to be accessible to
personnel, an isolation unit must be used. When multiple
RS485 networks are to be used, each network will require
its own isolation unit.
If more than one Drive is to be connected to a serial link, make connections
as shown in Figure 4–12. If only one Drive is to be connected, make the
connections shown for the last Drive.
1 A 100Ω termination resistor must be fitted in the last (or only) Drive
on the serial link. Use wire-cutters to remove the termination resistor
from all Drives except the last Drive on the serial link.
2 Connect two 2.2kΩ ±10% resistors as shown in Figure 4–12 to the last
(or only) Drive, on the serial link. Adding these resistors improves
noise immunity.
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