Dräger Pulsar 7000 Serie Instrucciones De Uso página 49

3. Select one of the following connection variants:
Power supply of the gas warning system via the TX transmitter (see Fig. A on Page 49)

Power supply of the gas warning system via the RX receiver (see Fig. B on Page 49)

Power supply for TX transmitter and RX receiver (see Fig. C on Page 49)

TX
A
C
1 Control unit and power supply
A Instrument cable of the transmitter
B, E Line between transmitter and receiver
C, F, G Line to the control unit
D Instrument cable of the receiver
4. Calculate the necessary cross-sections in accordance with the chosen cable lengths and the power intake of the transmitter
and receiver. An operating voltage of 18 V - 32 V must be present on the terminals of the transmitter and receiver.
In determining the cable lengths and the cable cross-section, the power supply must not be less than 18 V on the terminal
box (Power (+) to Power (-)).
The impedance of the 4 to 20 mA signal loop must not exceed 500 ohms.
®
If HART is used, the 4 to 20 mA signal loop must not fall below an impedance of 230 ohms. Observe the safety manual
(9033709).
RX
B
D
1
TX
F
TX
A
RX
A D
1
E
D
A
C
1
G
Operation en
RX
B
C
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