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09 PREVENTIVE AND CORRECTIVE MAINTENANCE
9.3.3.2
S500 I/O modules
The S500 modules have protected outputs and are used for
comprehensive diagnosis that covers a wide range of signal types.
Figure 9-5 S500 I/O modules in a COU
9.3.3.3
Serial communication interfaces
To identify the serial communication interface in the drive, see
“Appendix D – Wiring diagrams”.
For more information, see "Modbus TCP - NETA-21 remote monitoring tool
user manual" (3AUA0000031044).
9.3.3.4
LEDs on optional heat exchangers
Two LEDs on the front of the heat exchanger indicate the status of
the unit.
Alarm signals are also shown on the control panel.
