
Signal Connections 21
Figure 3-4: Connection to Line Driver Output
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 HSL-4XMO, encoder, and
the power supply is shown in the diagram below. Note that an
external current limiting resistor R is necessary to protect the HSL-
4XMO input circuit. The following table lists the suggested resistor
values according to the encoder power supply.
X I
f
= 6mA max.
Encoder Power (VDD) External Resistor R
+5V
0
Ω (None)
+12V
1.8kΩ
+24V
4.3kΩ
Table 3-1: Encoder Power / External Resistor
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