Perle Systems IOLINK-520 manual 24 & RS232C Link Pinouts, RS232 Link Pinouts

Link Interfaces Reference

V.24 & RS232C Link Pinouts

The connector shown here and pinouts described here correspond to

the connector labeled “RS232/ V.24” on the back of the IOLINK-PRO & 520.

		13	1
		25	14
			DB25 Female DTE
	CCITT			Direction
Contact	Circuit		Circuit	To	From
Number	Number	Circuit	Name	DCE	DCE
1	101	AA	Protective Ground	NA
2	103	BA	Transmitted Data	X
3	104	BB	Received Data		X
4	105	CA	Request to Send	X
5			----------
6	107	CC	Data Set Ready		X
7	102	AB	Signal Ground	NA
8	109	CF	Received Line Signal Detector (CD)		X
9			----------
10			----------
11			----------
12			----------
13			----------
14			----------
15	114	DB	Transmit Signal Element Timing (DCE Source)		X
16			----------
17	115	DD	Receive Signal Element Timing (DCE Source)		X
18	141		Local Loopback	X
19			----------
20	108.2	CD	Data Terminal Ready	X
21			----------
22	125	CE	Ring Indicator		X
23			----------
24	113	DA	Transmit Signal Element Timing (DTE Source)	X
25			----------
		Figure 3 - 7 RS232 Link Pinouts

The connecting cable must be a shielded cable.

NOTE For U.K. Approval:

The connecting cable should be manufactured from Belden Cable, or a cable with equivalent specifications. Each end must be terminated in a male 25 pin X.21 bis connector as defined in ISO-2110 1989. The cable may be any length between 0 and 5M.

IOLINK-PRO & 520 Reference Manual — 3.5