Figure 22: Open collector output as additional alarm output
The open collector output is an additional alarm output on the CS and can control an external relay e.g. In
addition the analogue output can be used simultaneously.
3.2.3 Direct connection to a RS232 on the computer
For a bidirectional RS232 connection of the sensor the following interface circuit can be used: MAX3381E
(manufacturer: Maxim) ► Appendix C: