Perle Systems IOLINK-520 manual RS530 Null-Modem Cable Configuration, 13 RS530 Null-Modem Cable

Link Interfaces Reference

RS530 Null-Modem Cable Configuration

DB25 MALE

1Shield

2Transmitted Data (A)

14Transmitted Data (B)

3Received Data (A)

16Received Data (B)

4Request To Send (A)

19Request To Send (B)

5Clear To Send (A)

13Clear To Send (B)

6DCE Ready (A)

22DCE Ready (B)

20DTE Ready (A)

23DTE Ready (B)

7Signal Ground

8Received Line Signal Detector (A)

10Received Line Signal Detector (B)

15Transmit Timing (A) DCE Source

12Transmit Timing (B) DCE Source

24Transmit Timing (A) DTE Source

11Transmit Timing (B) DTE Source

18Local Loopback

21Remote Loopback

17Receiver Timing (A) DCE Source

9Receiver Timing (B) DCE Source

25Test Mode

DB25 MALE

Shield	1
Received Data (A)	3
Received Data (B) 16
Transmitted Data (A)	2
Transmitted Data (B) 14
DCE Ready (A)	6
DCE Ready (B) 22
Clear To Send (A)	5
Clear To Send (B) 13
Request To Send (A)	4
Request To Send (B) 19
Received Line Signal Detector (A)	8
Received Line Signal Detector (B) 10
Signal Ground	7
DTE Ready (A) 20

DTE Ready (B) 23 Receiver Timing (A) DCE Source 17

Receiver Timing (B) DCE Source	9
Transmit Timing (A) DTE Source 24
Transmit Timing (B) DTE Source	11
Local Loopback 18
Remote Loopback	21

Transmit Timing (A) DCE Source 15

Transmit Timing (B) DCE Source 12

Test Mode 25

Figure 3 – 13 RS530 Null-Modem Cable

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.

This cable is needed when it is necessary to connect two units back-to-back and a set of modems is not available. Note that this cable specifies DB25 connectors on each end to allow direct connection to the link interface connector on each unit.

The link speed must be defined for each of the two units.

IOLINK-PRO & 520 Reference Manual — 3.11