Datasheet

Measurement Computing [phone]
1
[e-mail] mccdaq.com
MCC 134
Measurement Computing [phone]
1
[e-mail] mccdaq.com
Raspberry Pi Interface
The MCC 134 header plugs into the 40-pin
general purpose I/O (GPIO) connector on a
user-supplied Raspberry Pi. The MCC 134
was tested for use with all Raspberry Pi
models with the 40-pin GPIO connector.
HAT Configuration
HAT configuration parameters are stored
in an on-board EEPROM that allows the
Raspberry Pi to automatically set up the
GPIO pins when the HAT is connected.
Stackable HATs
Up to eight MCC DAQ HAT boards can be
stacked onto a single Raspberry Pi. Users
can mix and match MCC HAT models
in the stack.
Thermocouple DAQ HAT for Raspberry Pi
®
The MCC 134 is a 24-bit, 4-channel HAT add-on board for thermocouple measurements.
The board is shown here connected to a Raspberry Pi (not included).
Thermocouple Input
Users can connect up to four differential
thermocouples (TC) to the MCC 134 input
channels. TC types are software-selectable
per channel. TC values can be updated
every 1 second, minimum.
Thermocouple inputs are electrically iso-
lated from the Raspberry Pi to minimize
noise and provide protection from harsh
electrical environments.
Cold-Junction Compensation
The MCC 134 has three high-resolution
cold-junction compensation (CJC)
sensors.
Open-Thermocouple
Detection
The MCC 134 is equipped with open-
thermocouple detection (OTD) for all
TC input channels so users can monitor
the board for broken or disconnected
thermocouples.
Features
• Four isolated thermocouple
inputs
• 24-bit A/D converter
• 1 second update interval,
minimum
• Thermocouple types J, K, R, S,
T, N, E, and B supported
• Cold junction compensation
• Linearization
• Screw terminal connections
• Stack up to eight MCC HATs
onto a single Raspberry Pi
Software
• MCC DAQ HAT Library;
available on GitHub
Supported Operating Systems
• Linux
®
Programming API
• C, C++, Python
Overview
The MCC 134 is a thermocouple measurement HAT (Hardware Attached on Top)
designed for use with Raspberry Pi, the most popular single-board computer on
the market today.
A HAT is an add-on board with a 40W GPIO (general purpose input/output) con-
nector that conforms to the Raspberry Pi HAT specification.
The MCC 134 HAT provides four isolated thermocouple inputs. Up to eight MCC
DAQ HATs can be stacked onto one Raspberry Pi.
Power
The MCC 134 is powered with 3.3 V and
5 V provided by the Raspberry Pi through
the GPIO header connector.
MCC DAQ HAT Library
The open-source MCC DAQ HAT Library
of commands in C/C++ and Python
allows users to develop applications on
the Raspberry Pi using Linux.
The library is available to download from
GitHub. Comprehensive API and hard-
ware documentation is available.
The MCC DAQ HAT Library supports
operation with multiple MCC DAQ HATs
running concurrently.
Console-based and user interface (UI)
example programs are available.