Hach CD300 Manual Del Usuario página 15

Figure 4 Connect to DC power
Pin
1
2
3
4
5
Connect the compressed air cleaning
Electrocution hazard. Do not mix high and low voltage. Make sure that the relay connections are all
high voltage AC or all low voltage AC.
Fire hazard. Relay loads must be resistive. Always limit current to the relays with an external fuse or
breaker. Obey the relay ratings in the Specifications section.
Use the valve box connection to open or close the optional cleaning valve. Use wire that is rated for
300 V. Use a minimum wire gauge of 0.82 mm
Use the optional compressed air valve to make sure that measurements stop during the sensor
cleaning.
Note: Set the air pressure from 4 to 6 bar (58 to 87 psi).
Note: Make sure that the length of the air hose from the compressor to the sensor is 25 m (82 ft) maximum.
Table 4 DC wiring information
Connection
VIN1, 12–24 VDC (+)
VIN1, 12 VDC return (–)
VOUT2, Control voltage 1 (+)
VOUT2, Control voltage 1 (–)
PE (Protective Earth)
D A N G E R
W A R N I N G
2
(18 AWG).
Typical color
Red
Black
Red
Black
Green
English 15