Brooks Firetracker FT128 CIE - COM Loop; Programmable Voltage Outputs (S0-S1); Programmable Relay Output (R0)

Technical / Programming Manual
FT128 Rev 2.2
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 AS1668 Fire Fan Control
 Zone status indications and control
 Gaseous Extinguishing System
 NZ Fire Brigade mimic display
 MDH power supply and control
3.3 COM Loop
FT128 has one COM loop (0), to which the loop units are connected. Connections to the
COM loop are made via the external termination board on the equipment plate as shown
in drawing no. F665. Up to 255 loop units can be connected to the COM loop (i.e. address
1-255) when the panel is upgraded with software version ≥ V2.0.x. The exact number of
loop units and the cable length are dependent on the cable type (cable resistance) and the
total COM loop unit current consumption (i.e. the type and number of loop units). See
chapter “Current Consumption” page 168 and battery calculation spreadsheet. Each COM
loop unit has a Technical address (1-255) and each alarm point and Zone Line Input has a
presentation number (zone-address). Refer to the FT128 Operation Manual for more
information.
Normally the communication (and power supply) direction alternates every 22 seconds.
When the communication is in the COM loop A-direction, the COM loop voltage is checked
when the COM loop cable returns to the control unit. The voltage has to be > 12 V DC. If
not, a fault will be generated.
3.4 Programmable Voltage Outputs (S0-S1)
The 24VDC outputs S0-S1 are supervised (monitored)
7
. One to five 33K resistors can be
connected
8
, for connection diagram, refer to drawing F665. When the connections are
completed, a calibration has to be performed. See the FT128 Operation Manual chapter
"Calibration of Supervised Outputs (menu H5/A3)".
Each output has to be programmed (via EBLWin) for the following:
 Type (Control, Fire ventilation, Alarm device, etc.)
 Output signal period (steady, intermittent, pulse, delay, etc.)
 Supervised / Non-supervised
 Logic, i.e. normally low (default) or normally high (24 V
DC
)
9
.
 Control expression (contains one or more trigger conditions)
Note: The outputs S0-S1 are programmed as outputs for alarm devices by default.
S0: maximum 500 mA (Fuse F8).
S1: maximum 200 mA (Fuse F6).
See also chapter “Programmable Outputs”, page 77.
3.5 Programmable Relay Output (R0)
Refer to drawing F665 for connection diagram.
The output has to be programmed (via EBLWin) for the following:
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A normally high output cannot be supervised. The supervision voltage is 1.5 – 3.6 V
DC
(depending on the number of supervision
resistors) and the polarity is reversed compared to activated output.
8
PCB. no. 9285-5A: One to five 470 nF capacitors. The calibrated value has to be in the range 1K – 50K and 1 to 5 x 470 nF
respectively.
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See Section Table 1, page 15 regarding system voltage.