XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 77

• 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 (4-wire) & RS-422 Operation
DIP Switch Settings and Serial Port Connections
Figure B‐22.
RS‐485 (4‐wire)& RS‐422 w/ Termination (optional)
Termination is the 120  resistor between T+ and T‐.

DIP Switch settings are read and applied only while powering‐on.
Figure B‐20.
RS‐485 (4‐wire) & RS‐422
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‐06. RS‐485/422 (4‐wire) Signals and their implementations on the XTend Module Assembly
© 2010 Digi Internatonal, Inc.
DB-9 Pin
1, 4, 6
2
3
5
7
8
9
RS-485/422
R+ (RB)
R- (RA)
T+ (TB)
Name
T- (TA)
PWR
GND
Transmit Negative
Receive Negative
Transmit Positive
Receive Positive
Description
Signal Ground
Data Line
Data Line
Data Line
Data Line
Power
Figure B‐21.
Pins used on the female RS‐232 (DB‐9) 
Serial Connector
not used
Serial data received by the XTend Module Assembly
Serial data received by the XTend Module Assembly
Serial data sent from the XTend Module Assembly
Serial data sent from the XTend Module Assembly
Optional power input that is connected internally
to the front power connector
Implementation
Ground
77