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$1,145.00 (USA and Canada only)

Availability: In stock
Analog input, 8 channel, thermocouple or mV, channel-to-channel isolation

Production Specification

The GRV-ITMI-8 analog module is part of the groov EPIC® system. This flexible module provides 8 channels of input from millivolt or thermocouple field devices. Each channel is individually configurable for ±1200 mV, ±600 mV, ±300 mV, ±150 mV, ±75 mV, ±50 mV, ±25 mV or Type B, E, J, K, N, R, S, or T thermocouples.

The eight channels on the module are isolated from each other. Since these channels do not share any common connections, you can use grounded sensors and field devices with them.

The GRV-ITMI-8 mounts on a groov EPIC chassis with a GRV-EPIC-PR1 processor and additional analog, discrete, and serial groov I/O modules, to provide the mix of signals you need at any location.
Features GRV-ITM-12 GRV-ITMI-8
Scaling x x
Offset and Gain x x
Minimum/Maximum Values x x
Average Filter Weight x x
Simple Moving Average x x
Analog Totalizing x x
Problem indication x x
Specification GRV-ITM-12 and GRV-ITMI-8
Millivolt Input Ranges ±1200.0 mV, ±600.0 mV, ±300.0 mV, ±150.0 mV, ±75.0 mV, ±50.0 mV, ±25.0 mV
Over range limits (± 10%) ±1320.0 mV, ±660.0 mV, ±330.0 mV, ±165.0 mV, ±82.5 mV, ±55.0 mV, ±27.5 mV
Resolution mV Range / 1,048,576 (20 bits)
Accuracy 0.1% of Range ±1200 µV, ±600 µV, ±300 µV, ±150 µV, ±75 µV, ±50 µV, ±50 µV
Thermocouple ITS90 Types Accuracy (Default) / Accuracy (User-Calibrated) / Resolution
B: 90 °C to 1,820 °C 5.0 °C / 3.0 °C @ 250 °C / 0.05 °C
E: -270 °C to 1,000 °C 2.0 °C / 0.5 °C @ 0.0 °C / 0.05 °C
J: -210 °C to 1,200 °C 2.0 °C / 0.5 °C @ 0.0 °C / 0.05 °C
K: -270 °C to 1,372 °C 2.0 °C / 0.5 °C @ 0.0 °C / 0.05 °C
N: -270 °C to 1,300 °C 3.0 °C / 0.8 °C @ 0.0 °C / 0.05 °C 
R: -50 °C to 1,768 °C 5.0 °C / 2.5 °C @ 250 °C / 0.05 °C
S: -50 °C to 1,768 °C 5.0 °C / 3.0 °C @ 250 °C / 0.05 °C
T: -270 °C to 400 °C 3.0 °C / 0.5 °C @ 0.0 °C / 0.05 °C
Specification GRV-ITM-12 GRV-ITMI-8
Cold Junction Compensation Automatic Automatic
Data Refresh Time mV Ranges = 0.9 s
T/C Ranges = 1.2 s
mV Ranges = 100 ms
T/C Ranges = 200 ms
Analog Data Filtering -3 dB @ 14 Hz
-25 dB @ 60 Hz
-3 dB @ 14 Hz
-25 dB @ 60 Hz
Software Filtering: Simple Moving Average (SMA) 1 to 32 readings 1 to 32 readings
Software Filtering: Weighted Average 1 to 4096 1 to 4096
Step Input Response Time 1.2 s x SMA value
(38.4 s @ 32 SMA, Default SMA = 6)
16.5 ms x SMA value
(0.53 s @ 32 SMA, Default SMA = 8)
Common Mode Rejection > -120 dB > -120 dB
Input Resistance 100 megohm 100 megohm
Problem Indication out of range, open thermocouple out of range, open thermocouple
Isolation (field-to-logic) 300 V working, 1500 V transient (1 minute) 300 V working, 1500 V transient (1 minute)
Isolation (channel-to-channel) 300 V between channel group 0-5 & channel group 6-11.
None within a group.
300 V working, 1500 V transient (1 minute)
Number of Channels 12 8
Chassis Power Consumption 1.3 W 1.4 W
Minimum GRV-EPIC-PR1 Firmware Version 1.4.2 1.0.0
Minimum PAC Project Version 10.2003 10.0000
Minimum Library Package for CODESYS Version
Wire Size 28–14 AWG 28–14 AWG
Torque, connector screw 2.5 in-lb (0.28 N-m) 2.5 in-lb (0.28 N-m)
Torque, hold-down screw 3.5 in-lb (0.4 N-m) 3.5 in-lb (0.4 N-m)
Temperature (operating) -20 °C to +70 °C -20 °C to +70 °C
Temperature (storage) -40 °C to +85 °C -40 °C to +85 °C
Humidity (non-condensing) 5–95% RH 5–95% RH
Agency Approvals UL/cUL (Class 1 Div. 2)a; CE, ATEX (Category 3, Zone 2), RoHS; DFARS; CB Scheme; UKCA
Warranty Lifetime Lifetime
a For use in hazardous locations, equipment must be mounted in an enclosure that meets the requirements of the National Electrical Code, ANSI/NFPA 70, and ANSI/ISA-61010-1 (82.02.01).

groov Analog Thermocouple/Millivolt Input Module Data Sheet

The groov® analog thermocouple/millivolt input modules are part of Opto 22's groov EPIC® System. This document includes descriptions, specifications, and wiring and dimensional diagrams for the following part numbers:

groov I/O Modules Firmware Release Notes

This document lists the latest updates to the firmware for groov I/O modules. It includes information on new features, enhancements, and bug fixes.

List of groov I/O module firmware download pages

Note: This document was formerly called a readme. The name was changed to more accurately describe its content.

UKCA Declaration of Conformity (groov EPIC and groov RIO)

This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with the rules, regulations and standards of the United Kingdom. The models cited have been tested to the essential requirements listed in the Standards section, and fully comply with the legislation as listed in UK Legislation section.

ATEX Letter of Conformity for groov EPIC

This ATEX Letter of Conformity is provided to support CE Declaration of Conformity (groov EPIC and groov RIO), form 2261.

Declaration of Conformity (groov EPIC and groov RIO)

This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with European, international, and/or national standards and regulations.

CAD Drawing: groov I/O Module

This ZIP file includes drawings in a variety of file formats (pdf, dwg, stp) that apply to all groov I/O modules.

Note: These drawings do not apply to groov RIO modules.

CAD Drawings: groov EPIC and groov RIO I/O wiring

This ZIP file contains I/O wiring diagrams for groov EPIC I/O modules and groov RIO models, in DWG format.

GRV-ITMI-8 Module Firmware

This download contains current firmware for the GRV-ITMI-8 module. For a list of bug fixes and enhancements included in this firmware, see the groov I/O Modules Firmware Release Notes.

You can download previous versions of the firmware by clicking on the following links: 1.3c1.3b1.3a1.2d

Accuracy vs Resolution

What's the difference between accuracy and resolution in analog I/O specifications? Try your own specs in the calculator.