Chapter 4: Modules
HOBO Energy Logger Pro User’s Guide 15
Chapter 4:
Modules
This chapter discusses the following FlexSmart modules:
a Analog (CVIA) module
a TRMS module
Analog (CVIA) module
The Analog module (S-FS-CVIA) is an easy-to-configure, flexible DC signal-conditioning module for the HOBO
Energy Logger Pro. This two-channel module can accept (and provide excitation power to) a wide range of Onset
and third-party sensors with 0-20 V or 0-20 mA output, including devices with 4-20 mA current loop interface, and
sensors with 0-2.5, 0-5, and 0-10 V DC output.
The Analog module features input protection and signal filtering, as well as delta-sigma A/D conversion and factory
calibration. This module features extremely low-power operation, resulting in long battery life for unattended data
logging applications. Precision electronics provide ±0.25% accuracy from 50 mV to full scale (FS).
Sensors connected to this Analog module can be configured in HOBOware Pro software. Configuration options
include channel names, scaling parameters, and excitation power. Sensors are connected to the module via a seven-
pin Phoenix-style detachable screw terminal connector.
Functional block diagram
Using the module
Set up the Analog module as described below. When logging begins, the logger will acquire and store measurements
from the sensors attached to the module.
Connecting sensors to the module
Insert the Phoenix-style screw terminal connector into the connector on the end of the module.
Tip: The Analog module is a single-ended device. Pins 3 and 7 are connected to signal ground and to each other.
Refer to the sensor documentation for terminal connection details and use the pinout diagram below to connect a
two- or three-wire sensor or transducer to the module’s terminals. To make the connection, loosen the screw for
each pin on the connector, insert the appropriate wire, and tighten the screw.
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