Feedback Connector For Each Axis - National Instruments UMI-7664 User Manual And Specifications

The Enable output circuit provides a current source to an external device. The maximum output current
for the Enable output depends on the V
different V voltages.
iso
Note If the load current exceeds the over current trip point, the output shuts off.
The output voltage is within 1.2 V of the voltage provided on the V
for an illustration of the Enable output interface circuit.
Vcc
UMI-7774/72
Figure 20. UMI-7774/72 Optically Isolated Digital Output Circuit and Connection to an External Device

Feedback Connector for Each Axis

Each axis connected to the UMI-7774/72 has a 25-pin D-SUB feedback connector to which you can wire
incremental encoders, limits, and home sensors. Figure 14 shows the pin locations of the feedback
connector for each axis. Table 5 shows the corresponding signals for each pin.
Pin
1
2
NI UMI-7774/72 User Guide and Specifications
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voltage. Refer to Table 4 for the maximum output current at
iso
Table 4. Maximum Available Output Current
V
iso
30 V
24 V
5 V
Current Limiter
Table 5. Per Axis Feedback Connector Pin Assignment
Signal
Encoder Phase A
Encoder Phase B
22
Maximum Output Current (mA)
160 mA
150 mA
60 mA
power supply. Refer to Figure 20
iso
Viso
Current
Sense
Digital
Output
Load
Ciso
Optically Isolated
No
No
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