OPTO 22 - GRV-ITR-12 _ Thermistor, 12 ch, non-isolation

Quick Specs:

Thermistor
12 ch
non-isolation

The GRV-ITR-12 module is part of the groov EPIC^® system. This module has 12 channels of analog to digital conversion that convert resistance to temperature or to Ohms.

The module is ideal for NTC thermistors commonly used in HVAC, refrigeration, and process control applications. It may also be used with PTC thermistors in resistance sensing applications. The module has 12 channels of analog to digital conversion that convert resistance to temperature or to Ohms. The module reads variable resistance type transducers, with input ranges from 500 Ohms to 400 K Ohms, plus Autorange. You can also select from predefined curves for popular thermistors, as well as create custom curves. The module also offers options to decrease data refresh time and step input response time.

The GRV-ITR-12 module mounts on a groov EPIC^® chassis with a GRV-EPIC-PR1 processor and assorted discrete, analog, and serial groov I/O modules.

Specifications:

Features	GRV-IRTD-8	GRV-ITR-12
Scaling	x	x
Offset and Gain	x	x
Minimum/Maximum Values	x	x
Average Filter Weight	x	x
Simple Moving Average (SMA)	x	x
Analog Totalizing	x	x
Problem indication	x	x

Specification	GRV-ITR-12
Input Ranges (Ohms)	400 k, 200 k, 100 k, 50 k, 40 k, 20 k, 10 k, 5 k, 4 k, 2 k, 1 k, 500 and Autorange
Accuracy, normal mode (Ohms @ Range)	0.1%; specific values for indicated range: 400@400 k, 200@200 k, 100@100 k, 50@50 k, 40@40 k, 20@20 k, 10@10 k, 5@5 k, 4@4 k, 2@2 k, 1@1 k, 0.5@500
Accuracy, fast ADC mode (Ohms @ Range)	0.5%; specific values for indicated range: 2000@400 k, 1000@200 k, 500@100 k, 250@50 k, 200@40 k, 100@20 k, 50@10 k, 25@5 k, 20@4 k, 10@2 k, 5@1 k, 2.5@500
Excitation Current (Range & Load Watts Dissipated)	>7.9 µA (400 K & 25 µW), (200 K & 12.4 µW), (100 K & 6.2 µW), (50 K & 3.1 µW), >84.7 µA (40 K & 287 µW), (20 K & 144 µW), (10 K & 72 µW), (5 K & 36 µW), >169.2 µA (4 K & 115 µW), (2 K & 57 µW), (1 K & 29 µW), (500 & 14 µW)
Analog Data Filtering	-3 dB @ 2.4 Hz -25 dB @ 60 Hz
Software Filtering: Simple Moving Average	1 to 32 readings
Software Filtering: Weighted Average	1 to 4096
Data Refresh Time (normal mode)	900 ms
Data Refresh Time (fast ADC mode)	450 ms
Step Input Response Time (normal mode)	900 ms x SMA value (for example, 28.8 s @ 32 SMA, Default SMA = 4)
Step Input Response Time (fast ADC mode)	450 ms x SMA value (for example, 14.4 s @ 32 SMA, Default SMA = 4)
Problem Indication	out of range
Isolation (field-to-logic)	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.
Number of Channels	12
Chassis Power Consumption	1.3 W
Minimum groov EPIC Firmware Version	1.3.0
Minimum PAC Project Version	10.2000
Minimum Library Package for CODESYS Version	1.0.0.0
Wire Size	28 - 14 AWG
Torque, connector screw	2.5 in-lb (0.28 N-m)
Torque, hold-down screw	3.5 in-lb (0.4 N-m)
Temperature (operating)	-20 °C to +70 °C
Temperature (storage)	-40 °C to +85 °C
Humidity (non-condensing)	5 - 95% RH
Agency Approvals	UL/cUL(Class 1 Div. 2), CE, ATEX(Category 3, Zone 2), RoHS, DFARS; UKCA
Warranty	Lifetime

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