National Instruments 68M-50F STEP, 68M-50F SERVO, 68M-50F User Manual

USER GUIDE

68M-50F S
B

ULKHEAD CABLE ADAPTER

/S

TEP

Thank you for purchasing a 68M-50F step/servo bulkhead cable adapter.
Using the 68M-50F step/servo bulkhead cable adapter, you can connect a

68-pin motion controller to a 50-pin motion accessory , or you can connect
a 50-pin ValueMotion controller to a 68-pin motion accessory. You set
switches to configure the adapter for stepper or servo operation, as well as
to set each axis as either a trigger input or a breakpoint output.

ERVO

Configuring Your Adapter

Make sure the power is off to the controller and the accessory before setting
the switches.

Figure 1 shows the location of the switches on the adapter.

21

345

1 Step/Servo Switch Bank
2 Axis 1 Trigger/Breakpoint Switch
3 Axis 2 Trigger/Breakpoint Switch

Figure 1.

ValueMotion™ is a trademark of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names
of their respective companies.

322543A-01 © Copyright 1999 National Instruments Corp. All rights reserved. August 1999

68M-50F Adapter Switch Locations

4 Axis 3 Trigger/Breakpoint Switch
5 Axis 4 Trigger/Breakpoint Switch

Step/Servo Configuration

You must set all of the step/servo switches to match your motor type. Refer
to Figure 1 for the location of the step/servo switches. If you are controlling
a stepper motor, set all of the switches to STEP. If you are controlling a
servo motor, set all of the switches to SERVO.

Breakpoint/Trigger Configuration

You must set the breakpoint/trigger switches to match the desired operation
of your motion controller. Refer to Figure 1 for the location of the
breakpoint/trigger switches. Each breakpoint/trigger switch is associated
with a single axis and can be set individually for either breakpoint output
or trigger input operation. Set the switch to TRIG if the axis is used as a
trigger input. Set the switch to BP if the axis is used as a breakpoint output.

Installing Your Adapter

You have several options for installing your adapter, depending on the
devices you are connecting to each other and the cable that you are using to
make the connection. To install the adapter, make sure the power is off to
the controller and the accessory, and set the switches as required for your
application. Then, refer to Table 1 to determine how to connect your
controller to your accessory using the adapter and the appropriate cable.
The adapter is shown as a box with an “A” inside it.

Table 1.

Controller
Connector

50-pin 68-pin SCSI-II

50-pin 68-pin VHDCI

68-pin VHDCI 50-pin

68-pin SCSI-II 50-pin

Adapter Connection Options

Cable

A

A

SH68-68-S

SH68-C68-S

SH68-C68-S

SH68-68-S

A

A

Accessory

Connector