Servicing Information
89
RS530 / RS422 Null-Modem CableShield
TransmittedData(A)
TransmittedData(B)
ReceivedData(A)
ReceivedData(B)
RequestToSend (A)
RequestToSend (B)
ClearToSend (A)
ClearToSend (B)
DCEReady(A)
DCEReady(B)
DTEReady(A)
DTEReady(B)
SignalGround
ReceivedLineSignalDetector(A)
ReceivedLineSignalDetector(B)
TransmitTiming(A)D CESource
TransmitTiming(B)DCE Source
ReceiverTiming (A)DCE Source
ReceiverTiming (B)DCE Source
LocalLoopback
RemoteLoopback
TransmitTiming(A)DTE Sourc e
TransmitTiming(B)DTE Sourc e
TestMode
ClearToSend (A)
D
B
2
5
M
A
L
E
1
2
14
3
16
4
19
5
13
6
22
20
23
7
8
10
15
12
17
9
18
21
24
11
25
D
B
2
5
M
A
L
E
1
3
16
2
14
6
22
5
13
4
19
8
10
7
20
23
24
11
17
9
18
21
15
12
25
TransmittedData(A)
ReceivedData(A)
TransmittedData(B)
ReceivedData(B)
DCEReady(A)
DCEReady(B)
ClearToSend (B)
RequestTo Send (A)
RequestTo Send (B)
ReceivedL ineSignalDetector(A)
ReceivedL ineSignalDetector(B)
DTEReady(A)
DTEReady(B)
SignalGround
TransmitTiming(A)DTE So urce
TransmitTiming(B)DTE So urce
LocalLoopback
RemoteLoopback
ReceiverTiming(A)DCE Sourc e
TransmitTiming(A)DCE Source
TransmitTiming(B)DCE Source
TestMode
Shield
ReceiverTiming(B)DCE Sourc e
Figure C-13 RS530 / RS422 Null-Modem Cable
The connecting cable must be a shielded cable.