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RS-232C
The logic analysis system interfaces with
RS-232C Signal Definitions
Pin | Function | Signal Direction and Level | |
Number |
| Standard |
|
1 | Protective Ground | AA | Not applicable |
2 | Transmitted Data (TD) | BA | Data from Mainframe |
|
|
| High = Space = "0" = +12 V |
|
|
| Low = Mark = "1" = |
3 | Received Data (RD) | BB | Data to Mainframe |
|
|
| High = Space = "0" = +3 V to +25 V |
|
|
| Low = Mark = "1" = |
4 | Request to Send (RTS) | CA | Signal from Mainframe |
|
|
| High = ON = +12 V |
|
|
| Low = OFF = |
5 | Clear to Send (CTS) | CB | Signal to Mainframe |
|
|
| High = ON = +3 V to +12 V |
|
|
| Low = OFF = |
6 | Data Set Ready (DSR) | CC | Signal to Mainframe |
|
|
| High = ON = +3 V to +25 V |
|
|
| Low = OFF = |
7 | Signal Ground | AB | Not applicable |
8 | Data Carrier Detect (DCD) | CF | Signal to Mainframe |
|
|
| High = ON = +3 V to +25 V |
|
|
| Low = OFF = |
20 | Data Terminal Ready (DTR) | CD | Signal from Mainframe |
|
|
| High = ON = +12 V |
|
|
| Low = OFF = |
23 | Data Signal Rate Selector | CH/CI | Signal from Mainframe |
|
|
| Always High = ON = +12 V |