The Rs-232C Interface; The Rs-232C Interface Pinout - Black Box 232/CL-E Manual

RS-232 ↔ CURRENT LOOP INTERFACE CONVERTER

5. The RS-232C Interface

5.1 The RS-232C Interface Pinout

Pin
1
2
3
4
5
6
7
20
SIGNAL
DESTINATION
SIGNAL GROUND / COMMON RETURN
RECEIVED LINE SIGNAL DETECTOR
SECONDARY RECEIVED LINE SIGNAL INDICATOR
18
Circuit
AA
BA
BB
CA
CB
CC
AB
CD
RS-232 Interface (Female)
NUMBER
PROTECTIVE GROUND
TRANSMITTED DATA
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DATA SET READY
+ VOLTAGE
- VOLTAGE
SECONDARY CLEAR TO SEND
Figure 5-1. The RS-232C Interface.
Description
Protective Ground
Transmit Data
Receive Data
Request to Send
Clear to Send
Data Set Ready
Signal Ground
Data Terminal Ready
PIN PIN
NUMBER
1
14 SECONDARY TRANSMITTED DATA
2
15 DCE TRANSMITTER SIGNAL ELEMENT TIMING
3
16
SECONDARY RECEIVED DATA
4
17
RECEIVER SIGNAL ELEMENT TIMING
5
18
6
19 SECONDARY REQUEST TO SEND
7
20 DATA TERMINAL READY
8
21
SIGNAL QUALITY DETECTOR
9
22
RING INDICATOR
10
23
DATA SIGNAL RATE SELECTOR
11
24
DTE TRANSMITTER SIGNAL ELEMENT TIMING
12
25
13
Direction
---
To DCE
From DCE
To DCE
From DCE
From DCE
---
To DCE
SIGNAL
DESTINATION