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pinout (распиновка) |
EIA-449 (RS-449) Secondary connector
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Common names: EIA-449, RS-449, ISO 4902. Secondary (auxilary) channel
9 pin D-SUB MALE connector at the computer |
| Pin |
Name |
RS232 |
V.24 |
Dir |
Description |
| 1 |
|
n/a |
101 |
 |
Shield |
| 2 |
SSR |
SRR |
122 |
 |
Secondary Receiver Ready |
| 3 |
SSD |
SSD |
118 |
 |
Secondary Send Data |
| 4 |
SRD |
SRD |
119 |
|
Secondary Receive Data |
| 5 |
SG |
SG |
102 |
|
Signal Ground |
| 6 |
RC |
RC |
102b |
|
Receive Common |
| 7 |
SRS |
SRS |
120 |
|
Secondary Request To Send |
| 8 |
SCS |
SCS |
121 |
|
Secondary Clear To Send |
| 9 |
SC |
SC |
102a |
|
Send Common |
| |
Note: Direction is DTE (Computer) relative DCE (Modem).
Note: RS232 column is RS232 circuit name.
Note: V.24 column is ITU-TSS V.24 circuit name.
Источник: RS449 Page at Connectivity Knowledge Platform (Made IT)
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