Sierra Wireless AirLink MP, User Manual

Page: 35 / 63

Hardware and Software Installation
Rev 1.0 Mar.10 29
Figure 3-8: Pinout for MP DB9 connector
The serial connector uses these voltage specifications:
Figure 3-9: Voltage specifications for the MP modem’s serial connector.
Install the USB, Ethernet or serial cable
Note: Ensure that the MP
modem and your computer
are powered off while
installing cables. To install the USB, Ethernet, or serial cable, thread the cable through the vehicle
and attach it to the USB, Ethernet, or serial connector on the MP modem.
Note: Do not connect the cables to the computer until you have installed the software.
GPS configuration and reporting
GPS receivers use an array of orbiting satellites operated by the United States
Department of Defense to triangulate their coordinates on the Earth’s surface. In
order to use the GPS module in the MP modem, a GPS antenna must be
connected to the MP modem. (The installation requires either two antennas—one
Main RF and one GPS—or a single combination RF/GPS antenna.)
For more information about GPS, see the Primer on GPS Operations (document
#2130313) on the Sierra Wireless web site,
www.sierrawireless.com
.
3. Received Data (RxD)*
2. Transmitted Data (TxD)*
4. Data Terminal Ready (DTR)
5. Signal Ground (GND)
6. Data Set Ready (DSR)
7. Clear To Send (CTS)
8. Request To Send (RTS)
9. Ring Indicator (RI)
DB9 MALE
* RxD and TxD are named with respect to the MP modem
(that is, RxD is the Receive Data input to the MP modem,
and TxD is the transmit data out of the MP modem)
DB9 female connector
1. Data Carrier Detect (DCD)
1
5
6
9
Serial Host
Diversity RF
USB Host
Space logic 0
Transmission
region
Mark logic 1
Space logic 0
Transmission
region
Mark logic 1
˝
RS-232-C
Driver
RS-232-C
Receiver
+15 V
+5 V
-5 V
-15 V
+15 V
+3 V
-3 V
-15 V
2 V
noise margin