Hach CD500, Руководство пользователя

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Figure 6 Connect to DC power
Table 4 DC wiring information
Pin Connection Typical color
1 VIN1, 12–24 VDC (+) Red
2 VIN1, 12 VDC return (–) Black
3 VIN2, 12–24 VDC (+) Red
4 VIN2, 12 VDC return (–) Black
5 PE (Protective Earth) Green
Connect the relays
D A N G E R
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.
W A R N I N G
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 relay connections to start or stop an external device such as an alarm. Use wire that is rated
for 300 V. Use a minimum wire gauge of 18 AWG. Make sure to obey the relay connection
requirements in
Specifications on page 3. Make sure to have a second switch available to remove
power from the relays locally if there is an emergency or for maintenance.
1. Remove the power to the instrument.
2. Open the controller cover. Refer to Open the controller cover on page 10.
English 13