STATUS SCIENTIFIC CONTROLS MCU3 - Page 34

STATUS SCIENTIFIC CONTROLS
MCU System Installation and Hardware Configuration Manual
TD06/001
Issue:
6
Change Note:
1696
Page 4-4
4.1.1.3 FGD10B Infrared Current Sink
PL1
Terminals
24V
0V
21
22
23
24
Current
sense
circuit
Variable
voltage
output
4-20mA
Out
0V Sup
FGD10B
Connection Procedure
• Disconnect power from the system.
• Remove the grey protective cover from the associated input module
• Configure the jumper switches as shown below (i.e. J6, J7, J11, J13 and J14 switched
ON, all others OFF)
J12 J11 J10
J9 J8 J7 J6
J14
J13
• Connect a voltmeter (range 0-24V min) between pins 22 (+V) and 24 (0V) of PL1.
• Connect power to the system.
• Adjust VR1 and VR2 until voltmeter reads between 15V and 24V (VR1 and VR2 provide
fine and coarse voltage adjustment respectively).
• Disconnect power to the system and connect the wires from the detector head to PL1 on
the input module observing the following:
Detector Head
PL1
Pin Number
0
24
Supp
22
4-20mA out
21
• Connect power to the system and ensure the detector head operates.
• Measure the voltage between the + and 0 terminals at the detector head.
• Refit grey protective cover.
• Perform software configuration (refer to ‘MCU Software Configuration and System
Calibration Manual’).
• Perform system calibration.
The electronics for the head derives its power from the
current loop. A separate supply is provided for the sensor
due to the sensor requiring more than the 4-20mA loop
current range.