4.1.2.5 3-Wire Connection – (4-20mA Current Input and Separate Supply)
Connection Procedure
• Disconnect power from the system.
• Remove the grey protective cover from the appropriate input module
• Configure the jumper switches as shown below (i.e. J6, J7, J10, J12, J13 and J14
switched ON, all others OFF)
• Connect a voltmeter between pins 22 (+V) and 24 (0V).
• Connect power to the system.
• Adjust VR1 and VR2 until the correct voltage can be measured for the detector head
being used.
• Disconnect power to the system.
• Connect the detector head to the input module observing the above diagram.
• Refit grey protective cover.
• Connect power to the system and confirm that the detector head operates.
• Perform software configuration (refer to ‘MCU Software Configuration and System
Calibration Manual’).
• Perform system calibration. Refer to ‘MCU Software Configuration and System Calibration
Manual’ and detector head manufacturers instructions.
4.2 Analogue Output Configuration
In addition to providing the connections for various connector types, the Input Module can also
provide an analogue output. This output mimics the signal detected so that it may be used by
external equipment (e.g. chart recorders, data loggers) for a variety of purposes.
Note:
It is important to ensure that the Analogue Output is calibrated if in use (refer to ‘MCU Software
Configuration and System Calibration Manual’).
To Next Page
Loading...