Introduction - ICP DAS USA GPS-721 User Manual

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GPS-721 User Manual

1 Introduction

The I-7000 series is a family of network data acquisition and control
modules, providing analog-to-digital, digital-to-analog, digital
input/output, timer/counter and other functions. The modules can
be remotely controlled by using a set of commands, which we call
the DCON protocol. Communication between the module and the
host is in ASCII format via an RS-485 bidirectional serial bus
standard. Baud Rates are software programmable and
transmission speeds of up to 115.2 Kbps can be selected.
GPS-721 module features high sensitivity, low power and ultra
small form factor with DCON and GPS protocols. The inside GPS
module is powered by MediaTek solution and it can provide you
with superior sensitivity and performance even in urban canyon and
dense foliage environment. Except for the GPS data, GPS-721
includes 1 channel DO and 1 channel PPS for users to apply. A
Pulse per second (PPS) is an electrical signal that very precisely
indicates the start of a second. PPS signals can be used for precise
timekeeping and time measurement. One can combine the PPS
functionality with another time source that provides the full date and
time in order to ascertain the time both accurately and precisely.
Therefore, GPS-721 can be a powerful GPS remote module as well
as a general purpose GPS module with RS232 interface. It can also
be applied in Automotive navigation, Personal positioning and
navigation, Marine navigation, Satellite time correction and etc...
5/98 GPS-721 User Manual V2.0, Oct. 2010