Carrier 8DF-13 Guida Utente Pagina 47

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3. External Connection
40
SMC-4DF-PCI, SMC-8DF-PCI
Connection with the TTL level output
Board Driver Unit
A+
A-
AM26LS32A or
equivalence to it
Phase A+
Vcc
B+
B-
AM26LS32A or
equivalence to it
Phase B+
Vcc
Z+
Z-
AM26LS32A or
equivalence to it
Phase Z+
Vcc
Vcc
Vcc
GND
GND
Vcc
TTL level
output
Vcc
TTL level
output
Vcc
TTL level
output
Vcc
Figure 3.12. Encoder input circuit
CAUTION
- When connecting TTL level output signals, please do not insert a terminating resistor with reference
to "Setting the Terminating Resistor in chapter 2". When inserted with a terminating resistor
(factory setting), this product may malfunction, overheat, or causes a failure.
- Restrict the use of cables to 1.5m for the TTL level output.
- To prevent the circuit from malfunctioning due to noise, wire it as far away from other signal lines
and noise sources as possible.
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