Hach SP-51 Manual Básico Del Usuario página 14

4.3.3 Wiring for power
To connect the instrument to power, refer to
Figure 10 Power connection
1 Voltage switch (in 115 V position)
2 Voltage switch (in 230 V position)
Wire color code
North America
International
electrotechnical
commission (IEC)
4.3.4 Select the voltage
To prevent serious damage to the instrument, make sure that the line voltage is set correctly. Refer
to Figure 10 on page 14.
The instrument is set to 115-volt operation at the factory. To change the line voltage to 230-volt
operation, slide the voltage switch to the 230 V position. Refer to
Note: The fuses are approved for North American and European use and do not need to be changed with the
voltage.
4.3.5 Connect the alarm relays
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.
The current to the relay contacts must be 5 A or less. Make sure to have a second switch available to
remove power from the relays locally in case of an emergency or for maintenance. Power can be
removed with an external switch and a 5 A fuse or with a switched 5 A circuit breaker.
14 English
Figure 10
Table 1 Terminal wiring
Protective earth
ground
Green
Green with yellow line
N O T I C E
C A U T I O N
and Table 1.
3 AC power connector
4 Fuses (F1 and F2)
Hot or Ø1
Black
Brown
Figure 10
Neutral or Ø2
White
Blue
on page 14.