Perle Systems IOLINK-PRO IOLINK-520 - Manual (Page 34)

Link Interfaces Reference
IOLINK-PRO & 520 Reference Manual — 3.5
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
Contact
Number
CCITT
Circuit
Number Circuit
Circuit
Name
Direction
To From
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.