Terminal Description - Hach Sc4500 Manuel D'utilisation Simplifié

Figure 10 Connect the relays
Terminal Description
1 Relay 2, NC
2 Relay 2, common
3 Relay 2, NO
NC = normally closed; NO = normally open
4.3.5 Install an expansion module
Explosion hazard. This manual is only for installation of the unit in a non-hazardous location. For
installation of the unit in hazardous locations, use only the instructions and approved control drawing
provided in the hazardous location installation manual.
Expansion modules for analog outputs, analog inputs, analog sensors and Profibus communication
are available for the controller. Refer to the documentation supplied with the expansion module for
additional information.
4.4 Close the cover
Electrocution hazard. High voltage wiring for the controller is connected behind the high voltage
barrier in the controller enclosure. The barrier must remain in place except when installing modules,
or when a qualified installation technician is wiring for power, relays or analog and network cards.
20 English
Table 4 Wiring information—relays
W A R N I N G
D A N G E R
Terminal Description
4 Relay 1, NC
5 Relay 1, common
6 Relay 1, NO