20
Getting Started
it is equipped with: (1) a differential line driver or (2) an open col-
lector output.
Connection to Line Driver Output
To drive the PCIe-8154 encoder input, the driver output must pro-
vide at least 3.5V across the differential pairs with at least 8mA
driving capacity. The grounds of both sides must be tied together.
The maximum frequency is 3Mhz or more depends on wiring dis-
tance and signal conditioning.
Figure 2-5: Line Driver Connection Output Circuit
Connection to Open Collector Output
To connect with an open collector output, an external power sup-
ply is necessary. Some motor drivers can provide the power
source. The connection between the PCIe-8154, encoder, and the
power supply is as shown. Note that an external current limiting
resistor R is necessary to protect the PCIe-8154 input circuit.
Table 2-5: Device/Encoder/Power Connection
Encoder Power (V) External Resistor R
+5V
0
Ω
(None)
+12V
1.5k
Ω
+24V
3.0k
Ω
Содержание PCIe-8154
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