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4.3
COM loops
Each FT1020G3 has four COM loops (0-3) to which the loop units are connected.
Connections according to drawing F733.
On each COM loop, up to 255 COM loop units can be connected (COM loop address 001
– 255). 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). Regarding type and number of COM loop units in relation to the
cable length / type, see drawing F733 and chapters "FT1020G3 cable length", page 170
and "Current consumption", page 174.
NOTE: In total, up to 1020 (4 x 255) COM loop units can be used.
Each COM loop unit has a COM loop address (e.g. 123) and depending on the loop number
(e.g. 0) and the Control Unit number (e.g. 04), each COM loop unit has a technical number
(04 0 123). Each alarm point and zone line input has a fire alarm presentation number
(Zone-Address), e.g. 001-01. See FT1020G3 Operation Manual for more information.
Normally the communication (and power supply) direction alternates every 22 second.
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.
4.4
Programmable voltage outputs (S0-S3)
The 24V
DC
connected, for connection diagram, refer to drawing F732-02. When all connections are
completed, a calibration has to be performed, see chapter "Calibration of supervised
outputs" (menu H5/A1)", page 122 and the FT1020G3 Operation Manual. The calibration
value should be 1K-50K.
Each output has to be programmed via EBLWin for the following:
Type of output (Control, Alarm devices, etc).
Output signal period (steady, pulse, delay, etc.).
Supervised / non-supervised.
Logic, i.e. normally low (default) or normally high (24V
Control expression (contains one or more trigger conditions).
See also chapter "Programmable outputs", page 79.
4.5
Programmable relay outputs (R0-R1)
Connections according to drawing F732-02. Each output has to be programmed (via
EBLWin) for the following:
Type (Control, Alarm devices, etc.).
Output signal period (steady, intermittent, pulse, delay, etc.)
Logic, i.e. normally open (NO) or normally closed (NC) contacts
Control expression (one or more trigger conditions).
21
The outputs in EBLWin are set by default as supervised however, it is possible to change the setting of S0-S3 individually to be
not supervised.
A normally high output cannot be supervised. The supervision voltage is 1.5 – 3.6 V
22
resistors) and the polarity is reversed compared to activated output.
outputs S0-S3 are supervised (monitored)
Technical/Programming Manual
21
. One to five 33K resistors can be
(depending on the number of supervision
DC
22
FT1020G3 Rev 2.2.1
).
DC
22
.
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