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2 Technical Description
2.3 Features
!
WARNING
The relays are designed for a maximum switching voltage of AC 250 V/8 A in
overvoltage class III and degree of contamination 2 according to DIN EN
61010 Part 1.
The same applies for the air- and creep lines on the circuit board.
Resonance increases up to three times the rated operating voltage may oc-
cur when phase shift motors are controlled. These voltages are available at
the open relay contact. Therefore such motors may only be controlled under
observance of the technical data and the pertinent safety conditions via isola-
ted switching elements.
D Voltage output
A voltage output L+ for feeding two-wire-transmitters or contacts for digital inputs.
D Slots for options
Four rear slots can be used for functional expansions. The options modules are slot coded
so that wrong installation is largely ruled out.
Slot assignment, see figure 2-2 Rear view, page 25.
D Power supply unit
The power supply unit is designed for the following voltages depending on the standard con-
troller:
-
230 V/115 V AC, switchable by plug-in jumpers in the instrument.
-
24 V UC
20
Manual
SIPART DR21
C73000-B7476-C143-08
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