Perle Systems IOLINK-520 manual Link Pinouts, DB25, Number Name

Link Interfaces Reference

V.35 Link Pinouts

		13	1
		25	14
			DB25 Female DTE
DB25	M.34	CCITT			Direction
Contact	Contact	Circuit		Circuit	To	From
Number	Number	Number		Name	DCE	DCE
1	A			Protective Ground	NA
2				----------
3				----------
4	C	105		Request to Send	X
5				----------
6	E	107		Data Set Ready		X
7	B	102		Signal Ground	NA
8	F	109		Data Channel Received Line Signal Detector		X
9	P	103		Transmitted Data (A)	X
10	S	103		Transmitted Data (B)	X
11	R	104		Received Data (A)		X
12	T	104		Received Data (B)		X
13				----------
14	V	115		Receiver Signal Element Timing (A)		X
15				----------
16	X	115		Receiver Signal Element Timing (B)		X
17				----------
18	U	113		Transmitter Signal Element Timing (A) DTE	X
19	W	113		Transmitter Signal Element Timing (B) DTE	X
20	H	108.2		Data Terminal Ready	X
21		141		Local Loopback	X
22	J	125		Calling Indicator		X
23	Y	114		Transmitter Signal Element Timing (A)		X
24				----------
25	a	114		Transmitter Signal Element Timing (B)		X

Figure 3 - 10 V.35 Link Pin Outs

The connecting cable must be a shielded cable.

Circuits which are paired (contain an (A) and (B) reference) should be connected to twisted pairs within the connecting cable.

NOTE For U.K. Approval:

The connecting cable should be manufactured from Belden Cable, or a cable with equivalent specifications. One end must be terminated in a male 34 pin X.21 bis connector as defined in ISO-2593 1984. The other 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.

3.8— IOLINK-PRO & 520 Reference Manual