Installation and Configuration
Ndrive QL Hardware Manual
2.4.2. Opto-Isolated Outputs 0-3
The digital outputs are optically-isolated and may be connected in sourcing or sinking configurations. The
digital outputs are designed to connect to other ground referenced circuits and are not intended to provide
high-voltage isolation.
and
illustrate how to connect the outputs in current sourcing and current sinking modes,
respectively.
The opto-isolator's common connections can be directly connected to the drive's power supply; however,
doing so will effectively defeat the isolation and will reduce noise immunity.
Table 2-8:
Digital Output Specifications
Opto Device Specifications
Value
Maximum Voltage
24 V maximum
Maximum Sink/Source Current (each output)
50 mA/output
Output Saturation Voltage
0.3 V at maximum current
Rise / Fall Time
250 usec (2K pull up to 24V)
Reset State
Output Off (High Impedance State)
Table 2-9:
Digital Output Connector Pin Assignment (J108)
Pin
Description
7
Opto-Isolated Output 0
8
Opto-Isolated Output 1
9
Opto-Isolated Output 2
15
Common for Opto-Isolated Outputs 0-3
16
Opto-Isolated Output 3
28
Chapter 2
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