ELTEX Terrabox TCB030, Руководство по эксплуатации

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BA-en-4003-2005_TUE30
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4. Operation
Caution!
Please note the type plate indicating the connection data (supply voltage)
of the units.
Electrical systems used in explosion hazard areas must at all times be in a
technically faultless condition. Any defects must be repaired or remedied
immediately.
4.1 Start-up
If all connections (supply voltage, ground clamps, etc.) have been made
correctly, the system is operational and the supply voltage may be
activated.
4.2 Function
If the ground clamp has been connected properly and clamped to the
container/ bin to be grounded and monitored, the intrinsically safe circuit is
closed.
This status is indicated by the green light of the lamp and the relay
contacts pick up at the same time. Using the relay, pumps or primary
detectors may now be switched on or off. Interruptions or breaks in the
ground link are indicated by the red light and the relays dropping at the
same time. Any sensor contacts or conveyors switched via the relays will
be switched off.
The diagram of the TUE30 ground monitoring system is shown in Fig. 13.
Operating points see chapter 8 Technical specifications.
Rz is the resistance between clamp 1 and PAL 2, i.e. Rx plus any
resistance occurring between the PAL terminals;
Imess = intrinsically safe measuring circuit
Ex!
Fig. 13:
Diagram of the
TUE ground
monitoring system
z00
037
y
PAL
Rx
Ex ia
Z1
Z2
PAL
Imess