Advantech PCI-1241, Руководство пользователя

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25 Chapter 3
3.3 Pulse Output Connection
PCI-1241/1242 supports 4-axis pulse output channels for pulse-type
servo motor driver and stepping motor driver control.
Pulse Output Specifications
• Differential signal transmission method.
Refer to Figure 3-6. A transmitter will convert the input signal X into
X and X/ before outputting, and a receiver will compare the X and X/
inputs to obtain Y. Its truth table is shown in Figure 3-7. The advantage
of using the differential signal transmission method is that it eliminates
common mode noise. Please note that the reference point for the trans-
mitter and the receiver must be connected to prevent current leakage
from damaging the sending and receiving end due to potential differ-
ences.
• Pulse output format.
A/B Phase, CW/CCW, Pulse/Direction (please refer to Figure 3-7). In
A/B Phase mode, the encoder input signal can also be multiplied by 0
(input forbidden), 1, 2 or 4 times.
• A*_ECAP and A*_ECBP channels support polarity reversion.
• A*_ECAP and A*_ECBP channels support interchange function.
• Line driver: MC3487, output with 5V differential method.
Figure 3.6: Differential Signal Transmission Method