Campbell CR510 Manual del operador descargar pdf (Pagina 71)

6-1

SECTION 6. 9-PIN SERIAL INPUT/OUTPUT

6.1 PIN DESCRIPTION

All external communication peripherals connect

to the CR510 through the 9-pin subminiature D-

type socket connector located on the front of

the Terminal Strip (Figure 6.1-1). Table 6.1-1

shows the I/O pin configuration, and gives a

brief description of the function of each pin.

FIGURE 6.1-1. 9-pin Female Connector

TABLE 6.1-1. Pin Description

ABR = Abbreviation for the function name.

PIN = Pin number.

O = Signal Out of the CR510 to a

peripheral.

I = Signal Into the CR510 from a

peripheral.

PIN ABR

I/O Description

1 5 V O 5V: Sources 5 VDC, used

to power peripherals.

2 SG Signal Ground: Provides

a power return for pin 1

(5V), and is used as a

reference for voltage

levels.

3 RING I Ring: Raised by a

peripheral to put the

CR510 in the

telecommunications

mode.

4 RXD I Receive Data: Serial

data transmitted by a

peripheral are received

on pin 4.

5 ME O Modem Enable: Raised

when the CR510

determines that a

modem raised the ring

line.

PIN ABR

I/O Description

6 SDE O Synchronous Device

Enable: Used to

address Synchronous

Devices (SDs), and can

be used as an enable

line for printers.

7 CLK/HS I/O Clock/Handshake: Used

with the SDE and TXD

lines to address and

transfer data to SDs.

When not used as a

clock, pin 7 can be used

as a handshake line

(during printer output,

high enables, low

disables).

8 12 V: Sources

continuous 12 V, used to

power telephone

modems.

9 TXD O Transmit Data: Serial

data are transmitted

from the CR510 to

peripherals on pin 9;

logic low marking (0V)

logic high spacing (5V)

standard asynchronous

ASCII, 8 data bits, no

parity, 1 start bit, 1 stop

bit, 300, 1200, 9600,

76,800 baud (user

selectable).

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 263 264

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