Omega Engineering EN-EIC-325-PCI, Руководство пользователя

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26
I/O
Index input per each axis (indicating Marker/Home/Zero). The user may instruct the
card to reset its counter and/or generate an "Event Signal" output upon recognizing
the index input.
11 Logical Inputs. The inputs are TTL/CMOS compatible Schmidt trigger single
ended. Ten of them are general inputs and one is being used for requesting a real-time
counters snapshot of all four channels.
"Event Signal" opto-isolated output per each axis that may be used for Set Point,
Carry (Overflow) or Index (Marker) indi three general opto-isolated outputs.
"Voltage Failure" indicator allows the user to know if there is a short-circuit between
the output voltage source and the encoders (the thermal resettable fuse in the card
will resume normal operation after the short is ended).
Input Signals from the Encoders
Square wave signal:
Square wave Phase A and Phase B (Sine and Cosine) shifted by 90
°
.
Max. input pulse rate: 500 kpps.
Signals may be either single ended or differential.
Sine wave signal:
Two incremental sinusoidal signals Phase A and Phase B (Sine and Cosine) shifted by
90
°
.
Max. input pulse rate: 500 kpps.
General:
Index (marker) signals may be either single ended or differential.
HTL 0.5–5V or TTL compatible.
Characteristics of the electrical signals (encoder output impedance < 1 K Ω ):
Current output encoders: >
±
100
µ
A.
Voltage output encoders:
Differential: >
±
100mV for phases A, B (Sine and Cosine) and for the reference
index (marker) pulse.
Single ended: >2V amplitude (not recommended for Sine wave signal).
Excitation to the encoders: 5V DC.
Light source current: Max. 900 mA total. Protected by a polyswitch resettable
fuse.