Hach Accu4 User Manual page 10

Figure 5 Wiring overview
1 Analog output connections (2x)
2 RS232 connection (not used)
3 TTL connection
4 Sensor cable connections
General wiring procedure
W A R N I N G
Potential Electrocution Hazard. Always disconnect power to the
instrument when making electrical connections.
10 English
5 AC input power connections
6 Fuses (2x)
7 Relay connections (4x)
8 Grounding strip
Connect wiring to the controller as shown in the illustrated steps in
Figure 6. When wiring is complete, close the controller cover and tighten
all the cover screws in order to maintain the NEMA/IP environmental
ratings of the enclosure.