Null Modem Adapter (Male-To-Male); Null Modem Adapter (Female-To-Female); Serial Loopback Adapter - Digi XTend vB DigiMesh User Manual

Development Kit

NULL Modem Adapter (male-to-male)

Part Number: JD2D2-CDN-A (Black, DB-9 M-M)
The male-to-male NULL modem adapter is used to connect two DCE devices. A DCE device connects
with a straight-through cable to the male serial port of a computer (DTE). The following image shows
the Male NULL modem adapter and its pinouts.

NULL Modem Adapter (female-to-female)

Part Number: JD3D3-CDN-A (Gray, DB-9 F-F)
Use the female-to-female NULL modem adapter to verify that serial cabling is functioning properly. To
test cables, insert the female-to-female NULL modem adapter in place of a pair of device assemblies
(RS-232 interface board and XTend vB RF Module) and test the connection without devices in the
connection.
The following figure shows the adapter and its pinouts.

Serial Loopback Adapter

Part Number: JD2D3-CDL-A (Red, DB-9 M-F)
Use the serial loopback adapter for range testing. During a range test, the serial loopback adapter
causes the device to function as a repeater by looping serial data back into the device for
retransmission.
The following image shows the adapter and its pinouts.
XTend vB DigiMesh RF Module User Guide
Adapters
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