
EtherLite RJ-45 to DB-25M DCE Modtap Adapter
Modtap - RJ-45f (EtherLite) to DB-25m DCE
The wiring diagram for an RJ-45 8-pin to DB-25 DCE modtap is shown in Table 1.
This adapter is used to connect a terminal/printer to an EtherLite port, and is available
from Digi by ordering part number 76000451.
Table 1: EIA-232 RJ-45 8-pin to DB-25 DCE modtap
From
RJ-
45
Signal Direction Signal
To
DB-
25
1 RTS CTS 5
2 nc X DSR 6
3 DCD DTR 20
4 RxD TxD 2
5 TxD RxD 3
6 SG ↔ SG 7
7 DTR DCD 8
8 CTS RTS 4
* Arrows indicate which direction the signal is flowing
NOTES:
• This cable utilizes the RTS/CTS signals of the terminal/printer for hardware flow
control.
• Since null- modem swapping is done within the modtap, a straight-through RJ45
cable is used between EtherLite and modtap adapter.
• EIA-232 cables cannot exceed 2500pF.
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