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Connect Tech Blue Heat/Net Sync User Manual
14 Revision 0.03
Loopback Connectors
Loopback connectors are useful for performing diagnostics. The following figure illustrates the
recommended pinouts for creating loopback connectors for Blue Heat/Net Sync.
Figure 7: Recommended Pinouts for V.28 (RS-232) Loopback Connector
Figure 8: Recommended Pinouts for a V.11 (RS422) Loopback Connector
NOTES:
1. For an asynchronous loopback, omit the TXC and RXC pin.
2. When using clock signals, one signal must be configured as an
input, while the other must be configured as an output.
3. When using a DB-25 female loopback connector, solder cup
DB-25 connectors and 24 AWG solid core wire, such as wire
from a CAT5 cable is recommended.
2 - TX-
14 - TX+
16 - RX+
3 - RX-
9 - RXC+
17 - RXC-
11 - TXC+
12 - TXC-
7 - SR
DB-25 Male
2 - TX
3 - RX
4 - RTS
5 - CTS
6 -DSR
8 - DCD
20 - DTR
22 - RI
15 - TXC
17 - RXC
DB-25 Male