Granite Volt 108 8- or 16-Channel 5V Analog Input Module
Ideal for Expansion of Analog Measurements
Interfaces directly to a PC for quick setup and data acquisition
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications

Overview

The Granite™ Volt 108 easily expands the channel count on your data-acquisition system. It has eight differential or 16 single-ended input channels, as well as two excitation channels. The Volt 108 provides programmable, precision excitation for standard sensor measurements and power outputs for controlling sensors and peripherals. This module features a 24-bit, analog-to-digital converter with low-noise performance for superior analog measurements.

Benefits and Features

  • 24-bit ADC and low-noise inputs for increased measurement quality
  • Distributed data acquisition
  • Channel count expansion via the CPI bus on Campbell Scientific data loggers
  • Easier to program than traditional multiplexers
  • Programmable noise rejection
  • CANbus 2.0 A/B output available with the Extended Duty (-XD) version
  • USB 2.0 interface for PC-based operation with Campbell Scientific Surveyor software

Images


Specifications

Power Requirements 9.6 to 32 Vdc voltage
Mounting Standard 1-in. grid (DIN rail mounting available)
Accuracy
  • ±(0.04% of reading + offset) 0° to 40°C
  • ±(0.06% of reading + offset) -40° to +70°C
  • ±(0.08% of reading + offset) -55° to +85°C
Number of Channels 8 differential or 16 single-ended
Operating Temperature Range
  • -40° to +70°C (standard)
  • -55° to +85°C (extended)
Maximum Scan Rate
  • 1 channel at 1 kHz
  • 8 channels at 333 Hz
Input Range ±5000 mV, ±1000 mV, and ±200 mV
Period Averaging Traditional period averaging on analog input channels
CPI For data logger connection. Baud rate selectable from 50 kbps to 1 Mbps. (Allowable cable length varies depending on baud rate, number of nodes, cable quality, and noise environment, but can be as long as 700 m under proper conditions.)
USB USB 2.0 full speed connection available for attaching to a PC. (Port is used to configure the module and download updates via our Device Configuration Utility.)
Warranty One year against defects in materials and workmanship
Dimensions 20.3 x 12.7 x 5.1 cm (8 x 5 x 2 in.)
Weight 0.8 kg (1.75 lb)

Typical Current Drain

Sleep <1 mA
Active 1 Hz Scan 2 mA (estimated)
Assumes one single-ended measurement with the first notch frequency (fN1) at 30 kHz
Note: Any sensor excitation or switched power loads will be additive to this value.
Active 20 Hz Scan 20 mA
Assumes one single-ended measurement with the first notch frequency (fN1) at 30 kHz
Note: Any sensor excitation or switched power loads will be additive to this value.
Active 1 kHz Scan 67 mA
Note: Any sensor excitation or switched power loads will be additive to this value.

Voltage/Current Excitation Outputs

Voltage Excitation ±5 V (@ 50 mA)
Current Excitation ±2.5 mA (±5 V compliance voltage)
Number of Voltage/Current Excitation Outputs 2

General Purpose Outputs

Number of SW5V Outputs 2
SW5V Output Resistance 30 Ω
Number of SW12V Outputs 1
Typical Limit of SW12V Outputs 200 mA
Minimum Limit of SW12V Outputs 180 mA
Number of 12V Outputs 1
Typical Limit of 12V Outputs 200 mA
Minimum Limit of 12V Outputs 180 mA

Compatibility

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
CR1000X Requires OS version 4 or greater.
CR6 Requires OS version 10 or greater.

Miscellaneous

Product Compatible Note
Granite 10 Requires OS version 1 or greater.
Granite 6 Requires OS version 1 or greater.
Granite 9 Requires OS version 1 or greater.

Additional Compatibility Information

The Volt 108 is compatible with CPI-enabled data loggers only.

Videos & Tutorials

Downloads

CPI Calculator v.1.0 (2.49 MB) 06-07-2016

The CPI Calculator is a downloadable Microsoft Excel spreadsheet used to estimate the usage and capacity of a CPI network.  The calculator provides an overview on CPI devices including the CDM-A108, CDM-A116, CDM-VW300, CDM-VW305, and the CSAT3B.  The calculator can also estimate the measurement speed of the CDM-A108 and CDM-A116 based on the number of channels and measurement parameters.

 

The CPI Calculator is an estimation tool and will help you better understand and design CPI networks by considering the following:

  1. What is the capability of each CDM or CPI device
  2. What is the CPI network capacity
  3. How much of the CPI capacity are the CDMs or CPI devices using

 

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