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5.4 Retrofitting relays

(not in PROFIBUS

version)

Delivery range:

1relay circuit set with 2 screw fasteners

1relay cable set with socket

1 seal

Press-out relay opening

WARNING

Disconnect the S3Ca from the mains power supply and rinse liquid end before commencing

work (see section 10)!

IMPORTANT

When preparing the opening, ensure that the punch is not forced through the entire pump

base!

Pump circuits may become damaged.

왘 Place the S2Ca on a firm surface with the relay opening press-out section at the top (see

fig. 15)

왘 Place a punch (dia. 8-15 mm) in the centre of the relay opening press-out section , and

strike briefly and sharply with a hammer (approx. 250 g)

왘 If necessary clean up the edges of the opening

왘 Remove the pressed out section from the S2Ca

Inserting the relay component 왘 Hold the relay component with your right hand gripping the left and right hand edges of

the relay cover, and tilt the front end slightly to the left (see fig. 16)

왘 Push the relay component through the relay opening, holding the upper corner of the lower

edge against the guide rail on the pump base, until the contact of the relay component has

reached the controller contact. (test: can you still move the end of the circuit back and

forth?)

왘 Gently push the relay component right into the opening

왘 Screw the relay cover firmly onto the housing using the screws provided

왘 Insert the relay cable plug seal into the relay cover and screw on the plug (see fig. 18)

왘 The pump is generally programmed ex-factory to ”drop-out action alarm relay“ and – if

fitted – ”pull-up action clock pulse generator relay“. If a switching function is required, the

pump can be reprogrammed at the Heidelberg plant (not necessary by PROFIBUS

-version).

IMPORTANT

• The universal signal cable, the external/contact cable and the level monitor cable should

not be less than 1.20 m long, otherwise cable recognition will fail.

Features of the S2Ca metering pumps

Fig. 15 Fig. 16

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Sigma S2Ba Betriebsanleitung Seite 41