Remote-processing RPC-220 Manuel d'utilisateur télécharger pdf (Page 46)

TECHNICAL SPECIFICATIONS SECTION 15

Page 15-2

Interfaces to RPC P/ N 1723 char acter display. Contrast

adjustment provided.

Serial Ports

Type: RS-232

Ports: 2. One hardware from C PU, other is software.

Control

lines: Software lines may be used for RTS/CTS

control.

MECHANICAL

Size: 2.85" x 3.85"

Mounting: Mounting hole centers are 0.150" from

each corner. Hole sizes are 0. 125" d ia. in

0.250 pad. Use 0.250" standoffs for

mounting.

SHOCK AND VIBRATION

The RPC -220 board should withstand 5 g's r andom

vibration, 5 to 500 Hz if some moderate amount of

precautions are taken.

Secure voltage regulator U10 to the board and/or heat

sink using a 4-40 or 6-32 nut and screw. The pad under

U10 is not connected to a ny signal. It is there to aid in

power dissipation.

U3 is plastic and has relatively little mass. It is not as

susceptible to shock and vibration as a ceramic chip. It

can be secured by using a nylon tie wrap around the

chip. Another m ethod is to carefully apply silicon

rubber to each end of the chip and socket.

The batter y is soldered to the board. H owever , in

continuous vibr ation environments the welds could

break. Metal fatigue is possible in the bands connecting

the battery to the board. You will have to put a non-

conductive piece between the batter y and IC under it.

Keep in mind that the clock and RAM draw micro-amps

of current. Any conduction between the + and - sides

of the battery drains it. Be careful of chemical adhesives

as they may initially draw a lot of current unit they cure.

Another way ar ound the batter y problem may be to

remove B1 and solder leads to jumper W7. W 7 is for an

external battery.

Secure the settings for the reference and contrast pots R4

and R9. These pots are relatively open, so a high

viscosity fluid should be used.

MOUNTING TO A MOTHER BOARD

The RPC-220 can plug into a "mother board" which has

power, signal and other functions on it. F igure 15-1

shows pin 1 connector locations. Mother board

connectors are dual row, female, on a 0. 1" x 0.1"

matrix, for 0.025" square posts. Suggested connector

types are:

Manufacturer P/N and size

3M 929852-01-26 26 position

3M 929852-01-20 20 position

3M 929852-01-10 10 position

AMP 2-17314508 26 position

Oupiin 204-126GS PCB mount, 26 pin

Oupiin 204-120G S PC B mount, 20 pin

Oupiin 204-110G S PC B mount, 10 pin

Samtec SSM series (sur face mo unt)

Samtec SSW, SSQ series (through hole)

Samtec ESW, ESQ series (elevated)

Samtec connectors come in a variety of plating and

lengths. Contact them at 800-726-8329 for more

information.

Maximum component height is 0.350". However, other

components differ in height around the boar d. T ake this

into account when laying out your board.

Remote Processing can, on special order and in quantity,

put connectors on the circuit side of the board.

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Remote-processing RPC-220 Manuel d'utilisateur Page 46

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