National Instruments GPIB-232CT-A IBCL EPROM Bedienungsanleitung

NATIONAL

INSTRUMENTS

The Software is the Instrument

Installation Guide

_____________________________

NI-488.2™ is a trademark of National Instruments Corporation. Product and

company names are trademarks or trade names of their respective companies.

GPIB-232CT-A IBCL EPROM

Installation Guide

This guide describes how to replace the factory-installed EPROM that comes

with your GPIB-232CT-A. This kit is meant to be used with the GPIB-CT IBCL

Reference Manual.

The procedures in this guide should be performed only by qualified persons.

This guide contains separate instructions for the AC and DC versions of the

GPIB-232CT-A. Be sure you follow the appropriate instructions for

disassembling and reassembling your GPIB-232CT-A.

Introduction

The Interface Bus Control Language (IBCL) is a powerful, interactive language

that you can use to program the GPIB-232CT-A. You can use IBCL to create

custom applications that are outside the scope of the NI-488.2™software and the

firmware that comes with your GPIB-232CT-A. IBCL is intended for

experienced users who require additional functionality and stand-alone capability.

If you want to use IBCL, you must replace the factory-installed EPROM. The

original warranty for your GPIB-232CT-A is still valid if you follow the

directions in this installation guide.

What You Need to Get Started

One of the following boxes:

GPIB-232CT-A (100-120 VAC)

GPIB-232CT-A (220-240 VAC)

GPIB-232CT-A (DC)

GPIB-232CT-A IBCL EPROM

The following tools:

• Phillips screwdriver

• 3/16 in. nutdriver

• 1/4 in. nutdriver or pliers

• Scribe

Caution: Most of the circuitry in the GPIB-232CT-A uses advanced CMOS

technology and can be damaged by static electricity. Avoid

touching any of the components and take any necessary CMOS

handling precautions.

Disassembling the GPIB-232CT-A (AC Version)

This section describes the disassembly of the AC version of the GPIB-232CT-A.

The disassembly instructions for the DC version are located in the next section.

Warning: The GPIB-232CT-A contains circuitry which operates with

hazardous voltages. Do not open the unit unless you have removed

the power cord.

Refer to Figure 1 and complete the following steps to disassemble the

GPIB-232CT-A.

Note: You may find that organizing the pieces as you disassemble the

GPIB-232CT-A simplifies reassembly.

1. Disconnect any GPIB cables, the serial cable, and the power cord from the

GPIB-232CT-A.

2. Using a 1/4 in. nutdriver or pliers, remove the jackscrews (A), the lock

washers (B), and the GPIB connector shield (C) from the GPIB connector (I).

3. Using a 3/16 in. nutdriver or pliers, remove the jackscrews (D) and the

washers (E) from the 9-Pin D-Sub serial connector (L).

4. Lift the metal cover (F) from the lower assembly (M) of the GPIB-232CT-A.

5. Remove the four screws (G) that hold down the printed wiring board (H) at

each corner with the screwdriver.

Disassembling the GPIB-232CT-A (DC Version)

This section describes the disassembly of the DC version of the GPIB-232CT-A.

Refer to Figure 2 and complete the following steps to disassemble the

GPIB-232CT-A.

Note: You may find that organizing the pieces as you disassemble the

GPIB-232CT-A simplifies reassembly.

1. Disconnect any GPIB cables, the serial cable, and the power cord from the

GPIB-232CT-A.

2. Using a 1/4 in. nutdriver or pliers, remove the jackscrews (A), the lock

washers (B), and the GPIB connector shield (C) from the GPIB connector (I).

3. Using a 3/16 in. nutdriver or pliers, remove the jackscrews (D) and the

washers (E) from the 9-Pin D-Sub serial connector (L).

4. Lift the metal cover (F) from the lower assembly (M) of the GPIB-232CT-A.

5. Remove the four screws (G) that hold down the printed wiring board (H) at

each corner with the screwdriver.

Warning: Straining the power wires that connect the printed wiring board (H)

to the DC power jack (R) and the transistor (S) can damage your

GPIB-232CT-A. Do not strain these wires when changing the

EPROM (O). Be sure to support the printed wiring board to reduce

strain on the power wires (Refer to Figure 2).

6. Lift the printed wiring board (H) from the lower assembly (M).

Figure 2 shows the location of the parts you need to disassemble the DC version

of the GPIB-232CT-A.

Changing the GPIB-232CT-A EPROM (AC Version)

Refer to Figure 3 and complete the following steps to change the GPIB-232CT-A

EPROM.

1. Turn the printed wiring board (H) so that the underside is facing upwards.

2. Use the scribe to remove the old EPROM (O) by carefully prying it out of the

EPROM socket (P). Be careful not to put too much force on the EPROM

socket (P) which might cause it to crack.

3. Notice that the EPROM (O) and the EPROM socket (P) are each keyed in one

corner so that you can only insert the EPROM (O) in one orientation.

Remove the new EPROM from the antistatic bag. Align the new EPROM

(O) correctly with the EPROM socket (P).

4. Press firmly to ensure that the EPROM (O) is secure in the EPROM socket

(P).

5. Store the old or original EPROM in the antistatic bag for future use.

Changing the GPIB-232CT-A EPROM (DC Version)

Refer to Figure 4 and complete the following steps to change the GPIB-232CT-A

EPROM.

1. Turn the printed wiring board (H) so that the underside is facing upwards.

2. Use the scribe to remove the old EPROM (O) by carefully prying it out of the

EPROM socket (P). Be careful not to put too much force on the EPROM

socket (P) which might cause it to crack.

3. Notice that the EPROM (O) and the EPROM socket (P) are each keyed in one

corner so that you can only insert the EPROM (O) in one orientation.

Remove the new EPROM from the antistatic bag. Align the new EPROM

(O) correctly with the EPROM socket (P).

4. Press firmly to ensure that the EPROM (O) is secure in the EPROM socket

(P).

5. Store the old or original EPROM in the antistatic bag for future use.

Reassembling the GPIB-232CT-A (AC Version)

This section describes how to reassemble the AC version of the GPIB-232CT-A.

The reassembly instructions for the DC version are located in the next section.

Refer to Figure 5 and complete the following steps to reassemble the AC version

of the GPIB-232CT-A.

1. Align the printed wiring board (H) on the lower assembly standoffs (N). Be

certain that the berg sticks (Q) on the printed wiring board (H) line up with

the socket on the lower assembly (M).

2. Insert the four screws (G) to secure the printed wiring board (H) to the lower

assembly (M). Tighten the screws.

3. Gently press the metal cover (F) back onto the lower assembly (M) and

ensure that the metal cover (F) is positioned so that the tops of the light-

emitting diodes (J) are flush with the top of the GPIB-232CT-A.

4. Place one washer (E) on one jackscrew (D) and insert the jackscrew (D) into

the mounting holes on the 9-Pin D-Sub serial connector (L) and tighten using

a 3/16 in. nutdriver or pliers. Repeat with the other washer (E) and

jackscrew (D).

5. Place one lock washer (B) on one jackscrew (A). Hold the GPIB connector

shield (C) on the GPIB connector (I) and insert the jackscrew (A) through the

GPIB connector shield (C). Tighten using a 1/4 in. nutdriver or pliers.

Repeat with the other lock washer (B) and jackscrew (A).

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