Hardware configuration
CNC 8065
4.
(REF: 1404)
·53·
CENTRAL UNIT ICU.
4.4.5 Digital inputs and outputs. Electrical characteristics.
Digital inputs.
All digital inputs are galvanically isolated through opto-couplers. All the digital inputs have
the following characteristics:
Digital outputs.
All digital outputs are galvanically isolated through opto-couplers. All the digital outputs have
the following characteristics:
Nominal voltage. +24 V DC (between +18 V DC and +30 V DC).
High threshold "1". Over +18 V DC.
Low threshold "0". Under +9 V DC.
Typical consumption of each input. 5 mA.
Maximum consumption of each input. 7 mA.
Nominal voltage. +24 V DC (between +18 V DC and +30 V DC).
Output voltage. 2 V less than the supply voltage.
Maximum output current. 500 mA per output.
Minimum cycle on. Pins LI/O1 LI/O2: 25 µs (optional).
Rest of pins: 75 µs
For the PWM and synchronized switching, only pins LI/O1 or LI/O2 may be used. Depending on the
input receiving the PWM pulse and the cable, an external load resistor (at least 10% of rated current;
if 24 V, 470
Ω
/ 2 W) improves signal quality and noise immunity.
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