Trimble CAT GCS900 MS990 3D GPS GLONASS RTK Grade Control System

Trimble GCS900

Trimble GCS900 Grade Control System

Trimble GCS900 Grade Control System: 3D Automatic Control
One of the most revolutionary changes in the way earthworks are performed has been the introduction of 3D systems originally by Trimble in 1995. The Trimble GCS900 Grade Control System represents the next-generation 3D system from the company that invented 3D grade control.

The GCS900 Grade Control System is a cutting-edge earthmoving grade control system that puts design surfaces, grades and alignments inside the cab. The system uses GPS, GPS and laser, or advanced total station technology to accurately position the blade or bucket in real time, significantly reducing material overages and dramatically improving the contractor’s productivity and profitability.

The Trimble GCS900 is extremely flexible and can be used on excavators, dozers, motor graders and scrapers. You may purchase the GSC900 outright or as an upgrade from a Trimble GCS300 through GCS600 Grade Control System. And with its CAN-based design, the GCS900 can be easily moved from machine to machine, as needed.

Trimble GCS900 Features: How Does it Do That?

The positioning sensors are used to compute exact position of the blade or bucket many times per second. The on-board computer uses this position information, and compares it to the design elevation to compute cut or fill to grade. This information displays on the SV170 screen— in plan, profile, cross-section view, or text. The cut/fill data is also used to drive the valves for automatic blade control.
Additionally, the cut/fill data is passed to the GCS900 lightbars, providing additional visual guidance to the operator for up/down to grade and right/left to a defined alignment. The light bars are separate from the display so that the operator can focus on safely operating the machine by having the light bar in the field of view.


The MS980 GPS Smart Antenna, the SR300 laser receiver and the ATS Construction Total Station all connect to the same cable harness. This allows the contractor to easily switch between sensors; the contractor has the flexibility to use their system for all phases of earthmoving—from mass excavation through to finished grading.

Trimble MS990 Smart Antenna

A rugged and reliable new GPS-based positioning sensor, the MS990 is designed to provide advanced positioning capability with Trimble GCS900 3D Grade Control Systems.

The MS990 is the only commercially available integrated GPS smart antenna that offers the performance enhancements of a new Trimble RTK engine and supports the newest GPS signals.

Each unit contains a GPS receiver, antenna, and isolation system all in a single housing. It is designed specifically for installation on the blade or cab for use with GCS900 3D Grade Control Systems.

The MS990 uses an advanced RTK engine to provide faster system initialization times when satellite lock is lost. It also allows the GCS900 Grade Control System to increase machine productivity and utilization in tough areas of the jobsite, where tree canopies or other obstructions may exist.

The MS990 supports the L2C and planned L5 modernized GPS signals, improving performance of the GCS900 Grade Control System in job site areas where dense tree cover exists. The MS990 can also utilize signals from additional satellite constellations such as GLONASS. When combined with signals from GPS, this reduces system downtime when satellite availability is obstructed, such as when working against high walls or in deep cuts.

Trimble SNR900 Machine Radio

The Trimble SNR900 machine radio modem enables you to establish a robust, wireless data broadcast network for real-time, high-precision earth moving applications in the construction industry.

The 900MHz frequency offers many advantages for the construction site:

  • Virtually immune to inference
  • No licensing is required
  • Low-latency, high-speed link allows two-way data between office and site machines
  • Ideal operating range for construction sites
  • Single Radio for ATS or GPS and Two Way IP Data

The Trimble SNR900 radio has improved power conditioning over the Trimble SiteNet 900 radio, allowing operation on 12V or 24V machines using direct machine harness power with no intermediate conditioning. The integral antenna, status LEDs and rugged 8-pin connector are durable and waterproof to ensure longevity even under the harshest conditions.

Utilizing 900 MHz spread-spectrum technology, the Trimble SNR900 radio enables seamless network connectivity from office to field. With more memory, more processing power, and 128 kbps over-the-air data rate, the SNR900 is truly the smart choice for your critical wireless networking needs.

Trimble CB430 Control Box

The CB430 Control box is a computer that runs the system software. The control box has a color LCD screen to display guidance and other information, and push button controls to operate the system. In addition, the control box has a data card slot for loading and saving machine and display configuration data, and for loading and saving designs.

Trimble GCS900 Grade Control

Machine Compatibility

  • Compatibile Machine Models
    • 12H, 120H, 135H, 14H, 140H, 143H, 16H, 160H, 163H, 14M, 16M

(Trimble GCS900) MS990 Specifications:

Performance Characteristics
Tracking and performance: GPS: L1 C/A, L2C, and L5C Code with Full Cycle Carrier
Code differential Positioning: Horizontal accuracy: ±(0.25 m + 1 ppm) RMS, ±(0.820 ft + 1 ppm) RMS
Vertical accuracy: ±(0.50 m + 1 ppm) RMS, ±(1.640 ft + 1 ppm) RMS
Real Time Kinematic (RTK) positioning: Horizontal accuracy: ±(10 mm + 1 ppm) RMS, ±(0.032 ft +1 ppm) RMS
Vertical accuracy: ±(20 mm + 1 ppm) RMS, ±(0.065 ft +1 ppm) RMS
Initialization time: 10 seconds + 0.5 times baseline length in km, up to 30 km (Regular RTK operation with base station)
Initialization Reliability: Typically > 99.9%
Physical Characteristics:
Size: (height x width x depth) 147 mm x 231.9 mm x 251.1 mm
Weight: 3.8 kg (8.28 lb) with mount bracket
Mounting: Mast Mounting Bracket
Network Connector: 16 pin Amphenol bayonet, sealed
Indicators (3 yellow LEDs): Upper: DC Power on
Middle: GPS correction signal status (via radio link or cable)
Lower: GPS signal status
Environmental Characteristics:
Operating Temperature: -40°C to +70°C (-40°F to +158°F)
Storage Temperature: -50°C to +85°C (-67°F to +185°F)
Humidity waterproof, 100% fully sealed
Sealing +/- 5 psi sealing
Shock 75 Gs, 6 milliseconds duration, 3 shocks in each of the three mutually perpendicular axes
Vibration 20.4 gRMS
EMC: EN13309:2000, CE Mark, C-Tick

CB430 Specifications:

Key Features & Benefits
  • Rugged, ergonomically designed, 100% sealed cast aluminum on-machine display housing, with no internal moving parts
  • Advanced LCD display screen with adjustable brightness capability and viewing angle to accommodate different operational lighting conditions
  • A real-time multitasking operating system designed for mobile applications
  • Positive contact keyboard with backlit keys and tactile feel when pressed
  • Environmentally sealed data card slot with quick release door
  • Integrated, operator feedback beeper
  • High speed processor with low power consumption specifically for mobile applications which ensures reliable field operation and performance
  • Input connection – single power and data connector (39-pin Mil-spec)
  • Display mounting system which includes mount post and quick release locking swivel arm for a wide range of articulation
  • Quick System Configuration ensuring that all necessary operator display and machine configuration information are saved and can be restored when swapping the display between machines, for faster system startup
Size: 170mm (6.7″)
Length: 230mm (9.0″)
Depth: 101mm (4.0″)
Weight: < 3 kg (6 lb)
Display: 178mm (7.0”), 480(w) x 234(h) pixel extended quarter VGA, 65,536 true colour, TFT active matrix, 400+ lux, sunlight readable, scratchresistant, low-glare glass.
General Housing Materials: Fully sealed, high pressure die cast aluminum housing

SNR900 Specifications:

Physical Characteristics
Size 250 mm (height) x 85 mm (width) (10″ x 3.4″)
Weight 0.9 kg (2.0lb)
Environmental Characteristics
Operating temperature –40 °C to +70 °C (–40 °F to +158 °F)
Storage temperature –40 °C to +85 °C (–40 °F to +185 °F)
Humidity: Exceeds MIL-STD-810E (aggravated cyclic humidity),
Sealing: Environmentally sealed to ±34.5 kPa (±5 psi), immersible to 1m
Vibration: 6 gRMS, 20–2000 Hz random vibration
Shock: Operational: ±40 g 10 msec
Survival: ±75 g 6 msec
Radio-Modem Performance
Modes: Rover
Range: Optimal: 10 km (6 miles), line-of-sight
Typical: 3–5 km (2–3 miles) Varies with terrain and operating conditions.
Frequency range: US/Canada 902–928 MHz
Australia 917-928 MHz
New Zealand 921-928 MHz
Networks: 40 user selectable networks
Transmit power: Meets FCC requirements of 30dBm maximum power output.
Wireless data rate 128 Kbps

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Trimble GCS900Spec Sheet