Oldham MX 52, Руководство по установке

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1.2.2. DC supply
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Voltage : 21 to 30 volts DC. The “minus” of the DC supply is earthed (and the
earth is linked to the chassis).
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Maximum power : 240 W
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Maximum current in the cable : 12.5 A
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Cable = 2 x 2.5 mm2 or 2 x 4 mm2 depending on the length.
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Location of the terminal : Fig.8 ref : D page
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Protection : via 2 fuses located et the rear of the supply module (Fig 8 – ref : E)
1.3. THE SENSORS (Fig. 9 – Fig. 12)
NOTE :
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The sensors are linked by SHIELDED cables.
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The use of shielded cables is OBLIGATORY
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The ground braid of the shielded cables must be earthed at one end
1.3.1.. Explosimetric detectors of PONT type
Three connecting wires for a shielded cable.
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Resistance of detector / unit cable: 16 ohms maximum per wire, i.e. 32 ohms in
loop (1 km for cable 3 x 1.5 mm²).
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Connection on MX52 unit: see Fig. 10
ATTENTION
Each channel has been configured in the factory for one type of sensor (explo. Gas, toxic
gas, fire or flames).
Interchanging two types of sensor will lead to the destruction of the central board or of the
sensor.