VOLT108 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 VOLT 108 is a general-purpose, multiplexed analog measurement module. Designed specifically for static measurement applications, it can also be used for dynamic measurements up to 10 to 100 Hz depending on the application. The VOLT 108 supports all standard analog sensor measurements and easily expands the GRANITE™ data-acquisition system. The VOLT 108 has eight differential or 16 single-ended input channels and two excitation channels. It provides a 12 V and a switched 12 V port and two switched 5 V ports for peripheral control.

Benefits and Features

  • 24-bit ADC and low-noise inputs
  • Channel count expansion via the CPI bus
  • Scales up the number of channels without adding measurement time
  • Easy to configure
  • Selectable noise rejection
  • CANbus 2.0 A/B output available
  • USB 2.0 interface for direct-to-PC-based operation

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Specifications

Power Requirements 9.6 to 32 Vdc voltage
Mounting Standard 1-in. grid (DIN rail mounting available)
Estimated 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
  • -40° to +70°C (standard)
  • -55° to +85°C (extended)
Maximum Multiplexed Sample Rate 3.0 kHz (using fast [100 μs] input setting)
Maximum Burst Sample Rate 30 kHz
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
Active 20 Hz Scan 20 mA
Assumes one single-ended measurement with the first notch frequency (fN1) at 30 kHz

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.

Distributed Data Acquisition

Product Compatible Note
GRANITE10 Requires OS version 1 or greater.
GRANITE6 Requires OS version 1 or greater.
GRANITE9 Requires OS version 1 or greater.

Additional Compatibility Information

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

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