Boundless Technologies ADDS 3153 ASCII manual Terminal to Host DTE or Printer

Models: ADDS 3153 ASCII

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Terminal to Host (DTE) or Printer

Communications 11

SES1 EIA

Host

SES2 AUX

Host

 

 

 

 

 

 

D

Modem

 

 

D

Modem

 

 

C

 

 

 

C

 

DTE

 

E

 

DCE

 

E

 

 

 

 

 

 

 

Transmit

pin2

pin2

Transmit

Receive

pin2

pin2

Transmit

 

 

 

 

Receive

pin3

pin3

Receive

Transmit

pin3

pin3

Receive

 

 

 

 

DTR

pin20

pin20

DTR

DTR

pin20

pin20

DTR

 

 

 

 

DSR

pin6

pin6

DSR

DSR

pin6

pin6

DSR

 

 

 

 

Terminal to Host (DTE) or Printer

Refer to the diagram below to understand why a null modem adapter may be needed when connecting the first serial port (SES1-EIA) to a host port without a modem (Most serial printers are DTE devices and most hosts are not). The second port (AUX) will connect directly without a null modem since it is a DCE device.

SES1 EIA

Host

SES2 AUX

Host

 

 

 

 

 

 

 

Serial

 

 

 

Serial

 

 

D

Printer

 

 

D

Printer

 

 

 

 

 

 

 

 

T

 

 

 

T

 

DTE

 

E

 

DCE

 

E

 

 

 

 

 

 

 

Transmit

pin2

pin2

Transmit

Receive

pin2

pin2

Transmit

 

 

 

 

Receive

pin3

pin3

Receive

Transmit

pin3

pin3

Receive

 

 

 

 

DTR

pin20

pin20

DTR

DTR

pin20

pin20

DTR

 

 

 

 

DSR

pin6

pin6

DSR

DSR

pin6

pin6

DSR

 

 

 

 

Page 24
Image 24
Boundless Technologies ADDS 3153 ASCII manual Terminal to Host DTE or Printer