Eaton PowerXL DC1 20 Series Installation Manual page 101

3.6.2.4 Digital Input Signals
Control terminals 2, 3, 4, and 6 all have the same function and mode of
operation as digital inputs (DI1 to DI4).
A logic level of +24 V (positive logic) is used:
• 8 - 30 V = High (logic "1")
• 0 - 4 V = Low (logic "0")
The internal control voltage from control signal terminal 1 (+24 V, maximum
100 mA) or an external voltage source (+24 V) can be used for this.
The permissible residual ripple must be less than ±5 % ΔU
￫
If you use an external voltage source, make sure to connect the
0-V potentials of the externalvoltage source to the 0-V potentials
of the variable frequency drive.
￫
Control terminals 7 and 9 are the common 0 V reference
potential for all analog and digital input signals.
Optional modules DXC-EXT-IO110 and DXC-EXT-IO230 can be used to
optically isolate the digital inputs (DI1 to DI4) and integrate them directly into
control circuits with 110 V / 230 V. Values of 80 to 110/230 V AC will be
recognized as a high signal, ￫ Section 7.1.1, "DXC-EXT-IO... coupling
module", page 182.
DC1...20... and DC1...OE1 Variable Frequency Drives 02/20 MN040059EN www.eaton.com
3 Installation
3.6 Electrical Installation
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