Black Box PCW22A-R3, PCW22A-R4 manual RS-232 Cable Chart, Gnd

PROTOCOL CONVERTER A/S-2G

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

RS-232 Interface

SIGNAL		PIN	PIN			SIGNAL
DESTINATION	NUMBER		NUMBER			DESTINATION
SECONDARY TRANSMITTED DATA		14		1	PROTECTIVE GROUND
				2	TRANSMITTED DATA
DCE TRANSMITTER SIGNAL ELEMENT TIMING 15
				3	RECEIVED DATA
SECONDARY RECEIVED DATA		16
				4	REQUEST TO SEND
RECEIVER SIGNAL ELEMENT TIMING 17
				5	CLEAR TO SEND
		18
				6	DATA SET READY
SECONDARY REQUEST TO SEND 19
				7	SIGNAL GROUND/COMMON RETURN
DATA TERMINAL READY 20
				8	RECEIVED LINE SIGNAL DETECTOR
SIGNAL QUALITY DETECTOR 21
				9	+VOLTAGE
RING INDICATOR		22
			10		-VOLTAGE
DATA SIGNAL RATE SELECTOR 23
			11
DTE TRANSMITTER SIGNAL ELEMENT TIMING 24
			12		SECONDARY RECEIVED LINE SIGNAL DETECTOR
		25
			13		SECONDARY CLEAR TO SEND

Figure 5-1. The RS-232 Interface.

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