3. External Connection
CNT-3208M-PE
33
External Device Connection 2 -TTL level input-
Connecting the TTL level input
Use the TTL-compatible input to connect the board to the TTL-compatible output circuit of a rotary
encoder or linear scale. The maximum input frequency is 10 MHz.
For use in two-phase input mode, connect both of the phase-A and phase-B inputs. For use in single-
phase input mode, connect either of them. If phase-Z is not used, the input need not be connected.
Detailed description of TTL level input circuit
Figure 3.7. TTL level input circuit and its sample connection
Figure 3.8. Input signal
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The connection cable length should be within 1.5 m.
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To prevent noise from causing a malfunction, arrange the connection cable as away from any other
signal conductor or noise source as possible.
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In the input pin+, TTL level input circuit is parallel-connected.
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Please use the shielded cable to meet “CE EMC Directive”.
t
PWL
t
PWH : High-level count input pulse width 50nsec (Min.)
t
PWL : Low-level count input pulse width
50nsec (Min.)
t
PWH
CAUTION
Summary of Contents for CNT-3208M-PE
Page 7: ...vi CNT 3208M PE ...
Page 15: ...1 Before Using the Product 8 CNT 3208M PE ...
Page 30: ...2 Setup CNT 3208M PE 23 3 Click on the End button to finish condition setting Click on End ...
Page 35: ...2 Setup 28 CNT 3208M PE ...
Page 71: ...4 Functions 64 CNT 3208M PE ...
