ADLINK PCI-8154 - Manual (Page 35)

Signal Connections 25
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 PCI-8154, encoder, and the
power supply is shown in the diagram below. Note that an external
current limiting resistor R is necessary to protect the PCI-8154
input circuit. The following table lists the suggested resistor values
according to the encoder power supply.
I
f
= 8mA
For more operation information on the encoder feedback signals,
refer to section 4.4.
Encoder Power (V) External Resistor R
+5V 0
Ω
(None)
+12V 1.5k
Ω
+24V 3.0k
Ω