FT2GAS
Gaseous Extinguishing System
Rev No. 1.3
23
2.6
Power Supply Unit (PSU)
2.6.1
PSU Specifications
The main power source of the standard FT2GAS system is a 150W switch mode power supply, the
maximum current capacity is up to 5A @ 28V DC. The PSU supports the following:
•
Total current required for the internal circuits
•
Battery charging current
•
Maximum current required to drive external loads
•
Current required for optional web server and any additional loads.
WARNING: The maximum CIE current capacity shall not be exceeded in any applications. Otherwise
the fuses on the control board may blow and the CIE hardware may be damaged. Check system design
against the power supply and battery calculation spreadsheet in Appendix D page 39.
Table 12 Basic mains power supply requirement
Characteristics
Typical
Range
Input Voltage Range
230V AC
170-264VAC
Input Voltage Frequency
50Hz
47- 63 Hz
Output Voltage
28V
+/- 1%
AC Input Current
< 2A
Varies based on the applications
DC Output Current
5A @ 28V
Varies based on the applications
Larger power supplies can be used depending on the applications. However, larger enclosures would
be required.
The output voltage of the power supply is factory set, it may need to be checked and calibrated on-site.
The calibration procedure is as follows.
•
Use a calibrated and certified multi-meter to measure the DC voltage of the battery connection
(between TB1 POWER IN + and POWER IN -) on the FT2 control board or the battery terminals.
•
Adjust the AC/DC power supply potentiometer until the multimeter reading is stabilized between
27.3V – 27.5V DC.
WARNING: 240V AC.
Care must be taken when adjusting the AC/DC power supply. If you need to
remove the plastic cover protecting the 240VAC terminations use extreme caution. Always ensure the
cover is replaced correctly.
The standard FT2GAS system accommodates up to 12AH batteries.
