Aerotech Automation1 XC4e, Hardware Manual

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2.5.3. Digital Outputs
Optically-isolated solid-state relays drive the digital outputs. You can connect the digital outputs in
current sourcing or current sinking mode but you must connect all four outputs in the same
configuration. Refer to
Figure 2-40 and Figure 2-41 .
You must install suppression diodes on digital outputs that drive relays or other inductive devices. To see
an example of a current sourcing output that has diode suppression, refer to
Figure 2-40 . To see an
example of a current sinking output that has diode suppression, refer to Figure 2-41
The digital outputs are not designed for high-voltage isolation applications and they should only be used
with ground-referenced circuits.
The digital outputs have overload protection. They will resume normal operation when the overload is
removed.
Table 2-40: Digital Output Specifications
Digital Output Specifications Value
Maximum Voltage 24 V (26 V Maximum)
Maximum Sink/Source Current 250 mA/output
Output Saturation Voltage 0.9 V at maximum current
Output Resistance 3.7 Ω
Rise / Fall Time 250 µs (2K pull up to 24V)
Reset State Output Off (High Impedance State)
Table 2-41: Digital Output Pins on the Auxiliary I/O Connector
Pin# Description In/Out/Bi
7 Digital Output 0 Output
8 Digital Output 1 Output
9 Digital Output 2 Output
15 Digital Output Common N/A
16 Digital Output 3 Output
2.5. Auxiliary I/O Connector XC4e Hardware Manual
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