INFICON Protec P3000(XL) Helium Leak Detector - Manual (Page 27)

General Information
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1.6.4 RS232 Interface
The Protec P3000 is equipped with a RS232 interface which is located on the rear
right side of the main unit. This interface is of the DCE type (Data Communications
Equipment) and allows the connection of a PC for monitoring and data logging. The
connection is provided through a commercially available Sub-D plug. For further
information see “Interface Description Protec P3000” (kins26e1).
1.6.5 I/O Port
The I/O port allows communication with and control through external equipment via
PLC and analog data. For details see Section
6.1 .
Through this connection some functions of the Protec P3000 can be controlled
externally or measurement data or the status of the Protec P3000 may be
communicated to external equipment.
Through relay changeover contacts the trigger levels as well as the operating mode
(Ready) of the Protec P3000 may be monitored.
Warning
Only 3-core mains cables having a protective ground conductor must be used.
Operation of the Protec P3000 with the ground conductor unconnected is not
permissible.