XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 76

• 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
RS-485 (2-wire) Operation
DIP Switch Settings and Serial Port Connections
Wiring Diagram
Figure B‐18.
RS‐485 (2‐wire) w/ Termination (optional)
Termination is the 120  resistor between T+ and T‐.

DIP Switch settings are read and applied only while powering‐on.
When operating within the RS-485 protocols, all communications are half-duplex.
Figure B‐16.
RS‐485 (2‐wire) Half‐duplex
DIP Switch Settings
Note: Refer to Figures B-09 and B-10 for RJ-45 connector pin designations used in 
RS-485/422 environments.
Table B‐05. RS‐485 (2‐wire half‐duplex) signals and their implementations on the XTend Module Assembly
Figure B‐19. XTend Module Assembly in an RS‐485 (2‐wire) half‐duplex environment
© 2010 Digi Internatonal, Inc.
1, 3, 4, 6, 7
DB-9 Pin
2
5
8
9
RS-485 Name
T/R+ (TRB)
T/R- (TRA)
PWR
GND
Negative Data Line
Positive Data Line
Description
Ground Signal
Power
Figure B‐17.
Pins used on the female RS‐232 (DB‐9) 
Serial Connector
not used
Transmit serial data to and from the XTend Module Assembly
Transmit serial data to and from the XTend Module Assembly
Optional power input that is connected internally
to the front power connector
Implementation
Ground
76