Eaton DC1-124D1FN-A20N - Page 79

3 Installation
3.4 Electrical Installation
DC1 Frequency Inverter 10/12 MN04020003Z-EN www.eaton.com 75
3.4.2.5 Digital Input Signals
Control signal 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 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 % U
a
/U
a
.
The parameter configuration and the way functions are assigned are
described in  Section 6.2.1, “Digital Input (DI)“, page 108.
Optional modules DXC-EXT-IO110 and DXC-EXT-IO230 can be used to inte-
grate the digital inputs (DI1 to DI4), optically isolated, directly into controllers
with 110 V / 230 V. Values of 80 to 110/230 V AC will be recognized as a high
signal.
￫
Control signal terminals 7 and 9 are the common 0 V reference
potential for all analog and digital input signals.