Terminal Description - Hach SC4200c Manuel D'utilisation De Base

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 with analog outputs, analog inputs and Profibus communication are available for
the controller. Refer to the documentation supplied with the module for additional information.
4.4 Close the cover
Close the controller cover and make sure that the cover screws are tight to keep the environmental
rating of the enclosure.
After the power connections are made, install the high-voltage barrier. Make sure that the high-
voltage barrier is correctly put on the enclosure guides and fixed to the main PCBA. Refer to
on page 15.
Close the controller cover. Tighten the cover screws with a maximum torque of 2.26 Nm (20 lbf-in).
Refer to Figure 7 on page 14.
Table 4 Wiring information—relays
W A R N I N G
N O T I C E
Terminal Description
4 Relay 1, NC
5 Relay 1, common
6 Relay 1, NO
Figure 8
English 19