Product manual

XStream-PKG-R™ RS-232/485 RF Modem – Product Manual v5.x00

Adapters

The XStream Development Kit comes with several adapters that support the following functions:

• Performing Range Tests (Serial Loopback)

• Connecting to other RS-232 DCE and DTE devices (Male-to-Male NULL modem)

• Testing Cables (Female-to-Female NULL modem)

• Connecting to terminal blocks or RJ-45 (for RS-485/422 devices)

Serial Loopback Adapter

Part Number: JD2D3-CDL-A (Red, DB-9 M-F) The serial loopback adapter is used for range

testing. During a range test, the serial loopback adapter configures the radio modem to function

as a repeater by looping serial data back into the radio for retransmission.

Figure B.1. Serial loopback adapter and pinouts

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).

Figure B.2. Male NULL modem adapter and pinouts

Figure B.3. Example of a Digi Radio Modem (DCE Device) connecting to another DCE device)

NULL Modem Adapter (female-to-female)

Part Number: JD3D3-CDN-A (Gray, DB-9 F-F) The female-to-female NULL modem adapter is

used to verify serial cabling is functioning properly. To test cables, insert the female-to-female

NULL modem adapter in place of a pair of modem assemblies (XIB-R-R interface board +

XStream Modem) and test the connection without radio modems in the connection.

Figure B.4. Female NULL modem adapter and pinouts

For use in RS-485/422 systems:

DB-9 to RJ-45 adapters are

illustrated in the RS-485/422

Connection Guidelines section.