National Instruments NI MID-7652, Руководство пользователя и технические характеристики, Страница: 22 / 32

© National Instruments Corporation 21 MID-7654/7652 Servo Power Motor Drive User Guide
Note Using an unshielded cable may produce noise, which can corrupt the encoder signals and
cause lost counts, reduced accuracy, or other erroneous encoder and controller operation.
Limit Switch Terminal Blocks
For end-of-travel limit, home, inhibit input, and inhibit output connections, MID-7654/7652 axes have
a separate, 6-position removable screw terminal connector block. Figure 16 shows the limit switch
terminal block pin assignments.
Figure 16. Limit Switch Terminal Block Pin Assignment
(Passive Limit Switch Connection Example)
You can configure the inhibit output signal to be asserted low or asserted high from the MID-7654/7652
when an axis is inhibited. This signal can be useful for actuating mechanical brakes or for monitoring
an axis status. Refer to the
Amplifier Inhibit LEDs section of this guide for a description of the
conditions that will cause an axis to be inhibited.
Breakpoint and Trigger Terminal Blocks
Both the breakpoint and trigger connectors use a 6-pin removable terminal block.
The trigger terminal block provides access to the trigger input lines, shutdown input line, and digital
ground. The breakpoint terminal block provides access to the breakpoint output lines, the +5 V supplied
by the MID-7654/7652, and the digital ground. Figures 17 and 18 show the breakpoint and trigger
6-position terminal block assignments.
Figure 17. Trigger Terminal Block Pin Assignment
Figure 18. Breakpoint Terminal Block Pin Assignment
1
6
2
3
4
5
Forward Limit
Home Input
Inhibit Input
Digital Ground
Reverse Limit
Inhibit Output
1
2
3
4
5
6
Trigger Input 1
Trigger Input 2
Trigger Input 4
Digital Ground
Trigger Input 3
Shutdown Input
1
2
3
4
5
6 Breakpoint Output 1
Breakpoint Output 2
Breakpoint Output 4
Digital Ground
Breakpoint Output 3
+5 V