Sierra Wireless AirLink MP890, Руководство пользователя

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Hardware and Software Installation
Rev 1.0 Mar.10 31
• An Ethernet cable with RJ-45 connectors. The type of cable you use affects
the performance of the MP modem. The minimum requirement for the
Ethernet cable is an unshielded twisted pair (UTP) cable, category 3 or 4. For
better performance, use a shielded, category 5 cable. The theoretical
maximum length is 100 m (328 feet).
You can connect the MP modem Ethernet port directly to a computer or other
Ethernet device with either a cross-over or a straight-through cable.
Note: 5.5-meter cable part
number: 6000083. • A serial cable (with a DB9 connector on the MP modem end). The maximum
length of the serial cable is 5.5 m (18 feet). Sierra Wireless sells suitable
serial cables in 5-meter (16-feet) lengths.
Serial connector (DB9) pinouts
The MP modem is configured as DCE (Data Communications Equipment) and
uses the standard RS232 pin designations: Pinouts for an RS232 male DB9 serial
cable (left) that connects to the MP modem’s female DB9 serial connector (right).
Note that the two figures’ pinouts are mirror images of each other, since they plug
together.
The serial connector uses these voltage specifications:
Figure 4-8: 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.)
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