STATUS SCIENTIFIC CONTROLS MCU3 - Page 36

STATUS SCIENTIFIC CONTROLS
MCU System Installation and Hardware Configuration Manual
TD06/001
Issue:
6
Change Note:
1696
Page 4-6
4.1.1.5 FGD10A Infrared Current Source
The FGD10A is a current source device, i.e. the 4 to 20 mA signal is derived from the detector.
PL1
Terminals
24V
0V
21
22
23
24
Current
sense
circuit
Variable
voltage
output
PSU
- +
Aout
- +
FGD10A
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, J10, J12, 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
PSU -
24
PSU +
22
Aout +
23
• Connect power to the system and ensure the detector head operates.
• Verify that the voltage between the PSU+ and PSU- terminals at the detector head are
correct.
• Refit grey protective cover.
• Perform software configuration (refer to ‘MCU Software Configuration and System
Calibration Manual’).
• Perform system calibration.