Hardware configuration.
CNC 8070
5.
CENTRAL UNIT + MONITOR (ETX PLATFORM).
Technical/electrical characteristics of the inputs and outputs.
·76·
(REF: 1911)
5.9 Technical/electrical characteristics of the inputs and outputs.
5.9.1 Digital inputs.
All digital inputs are galvanically isolated through opto-couplers. All the digital inputs have
the following characteristics:
5.9.2 Digital outputs.
All digital outputs are galvanically isolated through opto-couplers. All the digital outputs have
the following characteristics:
5.9.3 Analog outputs.
Use shielded cables connecting their meshes to the corresponding shield pin. All the analog
outputs have the following characteristics:
Characteristic. Value.
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.
Characteristic. Value.
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
/ 2 W) improves signal quality and noise immunity.
Characteristic. Value.
Command voltage within range. ±10 V.
Resolution. 16 bits.
Minimum impedance of the connected device. 10 k.
Maximum cable length (unshielded). 75 mm.
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