West Control Solutions KS 94 - Manual (Page 5)

8. Electrical connections
galvanic isolation
* Versions with integrated supply voltage (connection example look at page 10)
8.1 Notes
q The ground connection of earth terminal A11 (terminal P13 with continuous controllers, too) should
be kept separate from the mains and as short as possible (15 cm during test). Keep mains cables
separate from signal and measurement input leads. We recommend twisted and screened
measurement input leads (screen contacted to measurement earth).
q When connecting a contactor to a relay output, an RC protective circuit is necessary, to avoid voltage
peaks which can cause trouble to the controller.
q Individual or common fuse protection must be fitted (1 A per instrument).
8.2 Connecting input INP1 1
Input for main process value x1 (actual value).
x1
a Thermocouple b Resistance thermometer
(Pt 100)
c Temperature difference (}1-}2)
(2x Pt 100)
d Potentiometric transducer e Current (0/4...20mA) f Voltage (0/2...10V)
Electrical connections
7 Operating instruction KS94