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5.7.3. Interfacing to PLC
5.7.3.1.
Combining Relay Outputs and Remote Computer
If you connect the ACM 150 monitor to a PLC (Programmable Logic Controller), you can
connect the relay and network outputs. Many users connect only the relay outputs to the
PLC so that ACM 150 monitor incidents trigger the desired control functions at the PLC
automatically. They use a remote computer to access the monitoring data associated with
the incidents.
5.7.3.2.
Gas concentration data
Some users prefer to send gas concentration data to the PLC and use the PLC to read
the data generated by incidents. This data may be sent via a network interface.
5.7.3.3.
Ethernet interface
The ACM 150 monitor is designed to connect to a PLC via gateways. The ACM 150
monitor has an Ethernet interface, and an OPC driver is available. If you use this interface,
all data is available to the PLC, i.e., the concentrations of all gases monitored on all ports.
5.7.3.4.
Gateway Interface
The ACM 150 monitor can provide an optional built-in programmable gateway that can
communicate with several different data protocols including many used in popular PLCs.
Ask your Honeywell representative for information regarding your application.