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PROTOCOL CONVERTER A/S-2G
28
5.3 RS-232 CABLE CHART
RS-232C pins are defined as follows:
1 = Chassis (or Frame or Protective) Ground F-GND, C-GND, or P-GND
2 = Transmit Data TD or TXD
3 = Receive Data RD or RXD
4 = Request to Send RTS
5 = Clear to Send CTS
6 = Data Set Ready DSR
7 = Signal Ground S-GND
8 = Carrier Detect CD
15 = Transmit Signal Element Timing (Clock) T-CLK or TXCLK
17 = Receive Signal Element Timing (Clock) R-CLK or TXCLK
20 = Data Terminal Ready DTR
22 = Ring Indicator RI
Figure 5-1. The RS-232 Interface.
1
2
3
4
5
6
7
8
9
10
11
12
13
PROTECTIVE GROUND
TRANSMITTED DATA
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DATA SET READY
SIGNAL GROUND/COMMON RETURN
RECEIVED LINE SIGNAL DETECTOR
+VOLTAGE
-VOLTAGE
SECONDARY RECEIVED LINE SIGNAL DETECTOR
SECONDARY CLEAR TO SEND
14
15
16
17
18
19
20
21
22
23
24
25
SECONDARY TRANSMITTED DATA
DCE TRANSMITTER SIGNAL ELEMENT TIMING
SECONDARY RECEIVED DATA
RECEIVER SIGNAL ELEMENT TIMING
SECONDARY REQUEST TO SEND
DATA TERMINAL READY
SIGNAL QUALITY DETECTOR
RING INDICATOR
DATA SIGNAL RATE SELECTOR
DTE TRANSMITTER SIGNAL ELEMENT TIMING
PIN
NUMBER
PIN
NUMBER
SIGNAL
DESTINATION
SIGNAL
DESTINATION
RS-232 Interface