A09-HSM-7 Digi International/Maxstream, A09-HSM-7 Datasheet - Page 66

• Manufacturer Part Number: A09-HSM-7
• Description: ANT 900MHZ 7" STRAIGHT W/RPSMA
• Manufacturer: Digi International/Maxstream

Specifications of A09-HSM-7

• Antenna Type: Whip: 1/2 Wave
• Number Of Bands: 1
• Frequency: 915MHz (902MHz ~ 928MHz)
• Vswr: 2
• Gain: 2dBi
• Termination: RP-SMA
• Mounting Type: Connector
• Height (max): 7.0" (177.8mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9XTend™ OEM RF Module ‐ Product Manual v2.x4x [2007.01.04]
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 Ω 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
© 2007 MaxStream, 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
Appendix B: Development Guide
Ground
66