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Product > Others > Placer 455DR |
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The Placer™ GPS 450/455 mobile
units provide a versatile and economical
platform for mobile positioning
applications.
Using state-of-the-art GPS
receiver technology, the Placer
unit has been optimized for ehicle
installation and operation, providing
reliable vehicle position, direction,
speed, time and tatus in any
weather, anywhere in the world.
The Placer units integrate GPS
and protocol support onto a
single board enclosed in a owprofile,
ruggedized housing.
The Placer units support the
worldwide standard TCP/IP (e.g.,
CDPD) packet data protocol, the
industry-standard MAP27 trunked
radio protocol (popular in Europe)
and the proprietary Ericsson RDI
trunked radio protocol. In all
instances, a Placer unit, with the
proper cable, can be connected
directly to a CDPD, MAP27 or
RDI radio with no other hardware.
Also, for conventional private
(UHF/VHF) and spread-spectrum
radio networks, the Placer units
can operate in a transparent mode
by simply passing the data to the
base station.
[download] Datasheet & Specifications
[download] Manual
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GENERAL SPECIFICATIONS |
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| Power (typical) |
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Source: 10-32 VDC, capable of 500mA
Operation: 250mA @ 13V; 3.25W (Max)
Standby: 10mA @ 13V; 1.3W
Backup: Lithium battery, 3.6VDC; 5 year shelf life |
Serial ports |
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Radio : (1) RS-232 DTE
MDT/RTCM : (2) RS-232 DCE |
Serial port speed, bps |
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300, 600, 1200, 2400, 4800, 9600(def ), 19200, 38400 |
Message formats |
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TAIP, TSIP, NMEA-0183 Version 2.1, RTCM SC-104 |
Comm protocols |
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TCP/IP (CDPD), MAP27, RDI, Transparent TAIP |
Digital I/O port
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Inputs: (2) switch closures
Outputs: (2) 300mA low-side drivers; ignition;
GPS, power, 1 pps |
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GPS SPECIFICATIONS |
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| Receiver |
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L1 frequency, C/A code (SPS), 8-channel
continuous tracking receiver, 16 correlators |
Update rate |
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Once per second; up to once per 9,999 seconds |
Accuracy |
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Position, meters (1 sigma) |
CrossCheck |
DR |
Non-Differential |
58 |
45 |
Differential (1Hz) |
2 |
1 |
Velocity (1 sigma): 1 meter/second
Time: UTC to nearest microsecond |
First acquisition |
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Typical (seconds) |
CrossCheck |
DR |
Cold start |
<120 |
<120 |
Warm start |
<45 |
<2 |
Hot back-up |
<20 |
<2 |
Reacquisition |
<2 |
0 |
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Datum |
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WGS-84 |
Differential
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Inverted Differential (non-DR operation), RTCM
SC-104, TAIP DC and DD messages via network |
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HEADING SENSOR SPECIFICATIONS |
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| Gyro |
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Piezoelectric vibrating beam |
Port |
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Gyro, Odometer, Backup light |
Odometer pulse |
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100mV to 28V peak to peak signal (user-supplied)
digital frequency proportional to speed. Min. output
2,000 pulses/mile. Recommended output: >8,000
pulses/mile. Use signal conditioner for analog. |
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PHYSICAL SPECIFICATIONS |
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| Assembly |
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Sheet metal, black anodized
Heading sensor: Injection molded plastic |
Size |
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45X: 229mm W x 95mm D x 33mm H
9” W x 3.75” D x 1.28” H
Heading sensor: 102mm W x 64mm D x 92mm H
4” W x 2.5” D x 3.625” H |
Weight |
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0.45 kg (1 lbs)
Heading sensor: 0.16 kg (0.35 lbs) |
Connectors |
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GPS antenna |
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SMB (receptacle) |
Radio
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DB9 (receptacle) |
MDT/RTCM |
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DB9 (receptacle) |
Digital I/O
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DB9 (receptacle) |
Heading sensor |
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DB9 (receptacle) |
Power |
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Switchcraft TA3 (plug) |
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