Brooks FireTracker FT2GAS, Руководство по эксплуатации и техническому обслуживанию

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FT2GAS
Gaseous Extinguishing System
Rev No. 1.3
18
2.5.2 Control Input and Output
2.5.2.1 Non Supervised Outputs
The standard FT2 module provides the following five non-supervised outputs:
•
Alarm relay output, changeover voltage free contacts
• Fault relay output, changeover voltage free contacts
• Isolate relay output, changeover voltage free contacts
•
Zone alarm level 1 relay output, changeover voltage free contacts
•
Zone alarm level 2 relay output, changeover voltage free contacts
The current carry capacity of each relay contacts is 2A.
The zone alarm level 1 relay and the zone alarm level 2 relay are only activated by the zones. The LCS
gas release input on the gas manual release input do not change the states of the two zone relay outputs.
2.5.2.2 Alarm Devices Output
FT2 control board provides 22-30V DC supervised output which can be used to activate warning devices
such as sounders, strobes, etc. The front display of FT2 has a segregated section for warning system
output which includes a disable facility with LED to confirm switch operation, fault and fire indications.
The warning system output can also be used to control external relays to control ancillary equipment.
Figure 4 below shows the connection diagram and end of line resistor. Series diode must be fitted if the
ancillary devices have no polarity.
NOTE: The voltage polarity is shown with the output in the active state.
Figure 4 Typical Relay or Sounder Control Circuit
The alarm devices (shown as ACF on the (PCB) output is 22-30V DC, maximum current is 1A. The
output is fully supervised for open and short circuit faults. The EOL resistor type is 47K, 1/2W or 1W,
1%, metal film.
2.5.2.3 Extinguishing System Inoperative Sign Output
The gas control board provides a supervised output to activate the Extinguishing System Inoperative
warning sign. The output is 22-30V DC @ 0.5A and fully supervised for open and short circuit faults.
The EOL resistor type is 20K, 1/2W or 1W, 1%, metal film.
For more details, refer to the data sheet of the system inoperative sign in Brooks product datasheets in
Appendix I 4.9.2 Warning Signs