Advanced MxPro 5 Mx-5100, Руководство пользователя

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5.2.2 Sounder Circuit Lengths
The voltage drop on each alarm circuit should be calculated to ensure that the minimum voltage at the end of
the circuit exceeds the minimum required by each sounding device at the minimum alarm circuit output voltage.
The voltage at the end of the circuit is given by:
Minimum Alarm Voltage = V
OUT(MIN)
– (I
ALARM
x R
CABLE
)
Minimum Output Voltage (V
OUT(MIN)
) is V
BAT(MIN)
– 0.5V = 20.5V
Alarm Current (I
ALARM
) is the sum of the loads presented by the sounding devices in alarm
Cable Resistance (R
CABLE
) is the sum of the cable resistance in both cores x cable length.
Cable Resistance (R
CABLE
) for 1.0mm
2
is 0.036Ω / metre
Cable Resistance (R
CABLE
) for 1.5mm
2
is 0.024Ω / metre
Cable Resistance (R
CABLE
) for 2.5mm
2
is 0.015Ω / metre
Insulation Resistance
(Core-Core and Core-
Screen)

2M Ω
5.2.3 Fire / Fault Routing Circuit Lengths
The voltage drop on each transmission circuit should be calculated to ensure that the minimum voltage at the
end of the circuit exceeds the minimum required by the relay coil at the minimum circuit output voltage.
Typically, relays will energise at 75% of their nominal drive voltage (i.e. 18V for a 24V coil)
The voltage at the end of the circuit is given by:
Minimum Coil Voltage = V
OUT(MIN)
– (I
ON
x R
CABLE
)
Minimum Output Voltage (V
OUT(MIN)
) is V
AUX(MIN)
– 0.8V = 19.7V
Maximum On Current (I
ON
) is 35mA.
Cable Resistance (R
CABLE
) is as above.
Insulation Resistance
(Core-Core and Core-
Screen)

2M Ω
5.2.4 Network Cables
For a list of recommended cables, refer to the AdNeT document 680-502.