Link Interfaces Reference
RS442 & RS530 Link Pinouts
The connector shown here and pinouts described here correspond to the connector labeled “RS530” on the back of the
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| 13 | 1 |
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| 25 | 14 |
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| DB25 Female DTE |
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| Direction | |
Contact |
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| Circuit | To | From |
Number | Circuit |
| Name | DCE | DCE |
1 | Shield |
| Protective Ground | NA | |
2 | BA (A) |
| Transmitted Data | X |
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3 | BB (A) |
| Received Data |
| X |
4 | CA (A) |
| Request to Send | X |
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5 | CB (A) |
| Clear to Send |
| X |
6 | CC (A) |
| Data Set Ready |
| X |
7 | AB |
| Signal Ground | NA | |
8 | CF (A) |
| Received Line Signal Detector |
| X |
9 | DD (B) | Receive Signal Element Timing (DCE Source) |
| X | |
10 | CF (B) |
| Received Line Signal Detector |
| X |
11 | DA (B) | Transmit Signal Element Timing (DTE Source) | X |
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12 | DB (B) | Transmit Signal Element Timing (DCE Source) |
| X | |
13 | CB (B) |
| Clear to Send |
| X |
14 | BA (B) |
| Transmitted Data | X |
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15 | DB (A) | Transmit Signal Element Timing (DCE Source) |
| X | |
16 | BB (B) |
| Received Data |
| X |
17 | DD (A) | Receive Signal Element Timing (DCE Source) |
| X | |
18 | LL |
| Local Loopback | X |
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19 | CA (B) |
| Request to Send | X |
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20 | CD (A) |
| Data Terminal Ready | X |
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21 | RL |
| Remote Loopback | X |
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22 | CC (B) |
| Data Set Ready |
| X |
23 | CD (B) |
| Data Terminal Ready | X |
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24 | DA (A) | Transmit Signal Element Timing (DTE Source) | X |
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25 |
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Figure 3 – 9 RS530 Link Pinouts
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.