National Instruments CRIO-FRC Bedienungsanleitung

Cleaning Your cRIO-FRC and Installing Protective Gaskets

This document describes how to clean the cRIO-FRC if it has been internally contaminated by metallic

debris such as wire fragments, flakes, or dust. You must be ery careful disassembling the cRIO-FRC.

When you remo e the printed circuit board (PCB) from the enclosure, it is ulnerable to electrostatic

discharge (ESD) and physical damage. Failure to follow the directions in this document may result in

damage to your cRIO-FRC and oid the warranty.

If you are uncomfortable with disassembling and cleaning your controller, you can provide a minimal

level of protection by installing the external Module Connector Gasket. To do that, skip to the

Installing the Module Connector Gasket section of this document.

Table of Contents

•Preparation

•Disassembling the cRIO-FRC

•Cleaning the cRIO-FRC

•Installing the I/O Gasket

•Reassembling the cRIO

•Installing the Module Connector Gasket

Preparation

Before getting started, make sure you ha e the following tools and an appropriate work en ironment.

Required Tools:

•#1 Philips Head Screwdri er (Caution: If you use a different-sized screwdri er, you can easily

destroy the cross recesses in the screw heads, making the screws nearly impossible to tighten or

remo e. Do not use a power screwdri er.)

On the left is a #1 screwdri er. On the right is a different-sized screwdri er.

•Compressed air

•Protecti e Gasket Kit

•Small, soft, clean paintbrush with non-conducti e bristles

•Small Ziploc® bag or other sealable container for holding loose parts such as screws

•ESD grounding wrist straps and an ESD mat, properly installed and grounded

NOTE: You should use an ESD mat whene er you handle electronics. Howe er, if a mat is not

a ailable, you can discharge static electricity from your body by touching the bare metal of a

grounded computer or other electrical equipment before touching the cRIO-FRC.

cRIO-FRC, Gasket Kit, ESD wristband, compressed air, #1 screwdri er, and clean paintbrush

Preparation:

•Clean your work area. You should disassemble the cRIO-FRC in a location free of dust and

metallic debris.

•Properly ground yourself and the cRIO-FRC to pre ent any electrostatic discharge (ESD) by using

an ESD wristband and mat.

•Take off all rings, bracelets, and dangling necklaces to reduce the risk of ESD

Disassembling the cRIO-FRC

C UTION

When handling the cRIO-FRC circuit board, ne er hold it by the components or connectors. Make sure to

hold the board only by the edges. Do not touch the integrated circuits. Before starting, make sure you

ha e read the abo e sections listing the tools and preparation required.

1. Remo e all external components from the cRIO. This includes any I/O modules, dust co ers,

power cable and connector, and any Ethernet or serial cables.

cRIO-FRC with all external components remo ed

2. Place the cRIO-FRC face down on the ESD mat. Using the #1 Philips screwdri er, remo e the

eight screws that secure the back plate to the chassis (Note: Take care to apply moderate

downward force and work slowly to reduce the risk of damaging the cross recesses in the screw

heads). Place the screws in a safe place like a Ziploc® bag or other sealable container.

Remo ing the screws

3. Keeping the cRIO-FRC facing downward, use one hand to gently press on the serial connector to

raise the back plate and PCB board and use your other hand to lift off and set aside the back

plate.

Remo ing the back plate

4. Using the same method as in the pre ious step, raise the PCB by lifting the serial port from

under the chassis with one hand, and carefully remo e the PCB with the other hand. Place the

PCB on the ESD mat with the connectors facing up, and set the chassis aside.

Remo ing the PCB

Cleaning the cRIO-FRC

C UTION

Use only compressed air to clean the cRIO-FRC. Do not clean the cRIO-FRC casing or PCB with any

cleaners or sol ents.

C UTION

When using compressed air, do not hold the can upside down or in a manner that causes liquid

propellant to spray onto the cRIO-FRC casing or PCB.

1. Hold the chassis away from your work surface and use compressed air to dislodge and remo e

debris from all sides of the chassis. Note that holding the chassis away from the work surface

remo es the risk of blowing debris from the chassis to the PCB.

Remo ing debris from the chassis with compressed air

2. Check to see if there are any foreign objects on or in the chassis that were not dislodged by the

compressed air. If so, use a small, soft, clean, dry paintbrush to remo e the debris.

Using a paintbrush to remo e foreign objects from the chassis

3. Repeat steps 1 and 2 to clean the PCB and back plate. Be careful not to force debris under the

components.

Installing the I/O and thernet Gaskets

Before reassembling the cRIO-FRC, you can install two gaskets to help pre ent future contamination.

NOTE

The gaskets reduce the risk of contamination but do not completely eliminate it. You should still keep

the cRIO-FRC away from conducti e debris such as metal sha ings and grinding debris.

C UTION

The gaskets are made of a thin, flexible material that can tear if they are repositioned after application.

Make sure each gasket is properly aligned before applying pressure to set the adhesi e.

1. Place the chassis face down on the ESD mat.

2. Remo e one of the gaskets from the packaging and peel away the paper backing to re eal the

adhesi e. Take care to minimize adhesi e contact with foreign objects such as fingers or dust.

3. Lightly place the gasket in the chassis adhesi e side down making sure it is aligned correctly

according to the following diagram.

4. Repeat steps 2 and 3 for the other gasket.

5. Before firmly seating the gaskets, flip the chassis o er and confirm that the gasket openings and

chassis openings are centered.

6. Using your finger, firmly press each gasket into place. Work slowly and take care not to tear the

gasket material.

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