RS232 25 pin Serial I/O Cable and connector pinouts

Information about cable, connector or adapter : RS232 25 pin

RS232 25 pin
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Category : All cables and connectors > Connectors > Computer > Serial I/O >
Added to database : 2005-12-20 12:17:01
Description : RS-232 was created for one purpose, to interface between Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) employing serial binary data interchange. So as stated the DTE is the terminal or computer and the DCE is the modem or other communications device.

RS232 25 pin

At the DTE

RS232 25 pin

At the DCE

Pinout :

Pin	Name	Direction	Color	Description
1	GND	------		AA: Protective Ground
2	TXD	OUT		BA: Transmit Data
3	RXD	IN		BB: Receive Data
4	RTS	OUT		CA: Request to Send
5	CTS	IN		CB: Clear to Send
6	DSR	IN		CC: Data Set Ready
7	GND	------		AB: Signal Ground
8	CD	IN		CF: Carrier Detect
9	-	-		RESERVED - Positive test
10	-	-		RESERVED - Negative test
11	STF	OUT		Select Transmit Channel
12	S.CD	IN		SCF: Secondary Carrier Detect
13	S.CTS	IN		SCB: Secondary Clear to Send
14	S.TXD	OUT		SBA: Secondary Transmit Data
15	TCK	IN		DB: Transmission Signal Element Timing
16	S.RXD	IN		SBB: Secondary Receive Data
17	RCK	IN		DD: Receiver Signal Element Timing
18	LL	OUT		Local Loop Control
19	S.RTS	OUT		SCA: Secondary Request to Send
20	DTR	OUT		CD: Data Terminal Ready
21	RL	OUT		Remote Loop Control
22	RI	IN		CE: Ring Indicator
23	DSR	OUT		CH/CI: Data Signal Rate Selector
24	XCK	OUT		DA: Transmit Signal Element Timing
25	TI	IN		Test Indicator

Note : RS232 25 pin

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