National Instruments 68M-50F STEP User manual

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

USER GUIDE

68M-50F STEP/SERVO

BULKHEAD CABLE ADAPTER

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.

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.

Figure 1. 68M-50F Adapter Switch Locations

1 Step/Servo Switch Bank

2 Axis 1 Trigger/Breakpoint Switch

3 Axis 2 Trigger/Breakpoint Switch

4 Axis 3 Trigger/Breakpoint Switch

5 Axis 4 Trigger/Breakpoint Switch

21

3

4

5

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/servoswitches. 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

Youmust set the breakpoint/trigger switches tomatch the desiredoperation

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. Adapter Connection Options

Controller

Connector Cable Accessory

Connector

50-pin 68-pin SCSI-II

50-pin 68-pin VHDCI

68-pin VHDCI 50-pin

68-pin SCSI-II 50-pin

ASH68-68-S

ASH68-C68-S

A

SH68-C68-S

SH68-68-S

A

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