XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 78

• Manufacturer Part Number: XTH9-MI-128
• Description: MODULE RF 900MHZ 1W 115K W/MMCX
• Manufacturer: Digi International/Maxstream

Specifications of XTH9-MI-128

• Frequency: 900MHz
• Data Rate - Maximum: 230kbps
• Modulation Or Protocol: FHSS, FSK
• Power - Output: 30dBm
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Receiving: 80mA
• Current - Transmitting: 260mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -

XTend™ RF Module ‐ Product Manual v2.x6x
Wiring Diagrams
RS-485/422 Connection Guidelines
Figure B‐23. XTend Module Assembly in an RS‐485 (4‐wire) environment
Figure B‐24. XTend Module Assembly in an RS‐422 environment
The RS-485/422 protocol provides a solution for wired communications that can tolerate high
noise and push signals over long cable lengths. RS-485/422 signals can communicate as far as
4000 feet (1200 m). RS-232 signals are suitable for cable distances up to 100 feet (30.5 m).
RS-485 offers multi-drop capability in which up to 32 nodes can be connected. The RS-422 proto-
col is used for point-to-point communications.
Suggestions for integrating the XTend RF Module with the RS-485/422 protocol:
1.
2.
3.
4.
© 2010 Digi Internatonal, Inc.
When using Ethernet twisted pair cabling: Select wires so that T+ and T- are connected to
each wire in a twisted pair. Likewise, select wires so that R+ and R- are connected to a
twisted pair. (For example, tie the green and white/green wires to T+ and T-.)
For straight-through Ethernet cable (not cross-over cable) - The following wiring pattern
works well: Pin3 to T+, Pin4 to R+, Pin5 to R-, Pin6 to T-
Note that the connecting cable only requires 4 wires (even though there are 8 wires).
When using phone cabling (RJ-11) - Pin2 in the cable maps to Pin3 on opposite end of
cable and Pin1 maps to Pin4 respectively.
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