National Instruments NI MID-7654, User Manual And Specifications

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© National Instruments Corporation 15 MID-7654/7652 Servo Power Motor Drive User Guide
Caution The servo motor connectors on this drive are energized when the unit is powered on. The
rear guard must be in place at all times while the unit is connected to a power outlet. Disconnect the
MID-7654/7652 unit from power outlet before connecting wires to or disconnecting wires from
the servo motor connectors. Strip back the insulation of the servo motor wires to the servo motor
connectors no more than 7 mm. Reattach the rear guard before you reconnect the unit to a power
outlet.
Failure to do so could result in electric shock leading to serious bodily injury or death . Refer
to the Rear Guard section of this guide for information on using the rear guard.
Take the following steps to wire your motion system to your MID-7654/7652:
1. Connect the motion controller to the MID-7654/7652 using the interface cable. Wire the motor
power, limit switch, encoder, and I/O terminal blocks to your motion control system.
2. For proper operation, configure the power entry module to match the voltage of your power source.
Refer to the
Modifying the Power Entry Module section for more information.
Caution You must change the MID-7654/7652 main input fuse on the rear panel if you change the
line voltage from the factory setting. Refer to the Replacing a Fuse section in the Modifying the
Power Entry Module section of this guide for information on changing a fuse.
3. Install the power cord into the back panel AC connector and plug it into a correctly rated power
source.
Terminal Block Wiring
This section describes how to wire the terminal blocks on your MID-7654/7652.
Servo Motor Power Terminal Blocks
For motor power wiring, each MID-7654/7652 axis has a separate 5-position removable screw terminal
block. Figure 7 shows a typical servo motor configuration pin assignment. The dotted loop indicates a
shielded cable.
Figure 7.
Typical Servo Motor (DC Brush Type) Terminal Block Pin Assignment
Caution The servo motor connectors on this drive are energized when the unit is powered on. The
rear guard must be in place at all times while the unit is connected to a power outlet. Disconnect the
MID-7654/7652 unit from power outlet before connecting wires to or disconnecting wires from
the servo motor connectors. Strip back the insulation of the servo motor wires to the servo motor
connectors no more than 7 mm. Reattach the rear guard before you reconnect the unit to a power
outlet.
Failure to do so could result in electric shock leading to serious bodily injury or death . Refer
to the Rear Guard section of this guide for information on using the rear guard.
You should use shielded 20 AWG wire or larger for the motor power cable. If available, connect a motor
case ground wire to pin 3 (Ground/Shield) on the MID-7654/7652 as shown in Figure 7; this wire helps
avoid ground loops and signal noise problems. (Case ground connects to the motor housing, not to any
of the motor power terminals.)
1
2
3
4
5
Motor +
Motor –
Motor Case Ground
+ –
Shield
Servo Motor