OPTO 22 - GRV-IRTD-8 _ Analog input, 8 channels, temperature/RTD or resistor

Quick Specs:

Analog input
8 channels
temperature/RTD or resistor

The GRV-IRTD-8 analog input module is part of the groov EPIC® system. This module provides 8 input channels, each individually software configurable.

This module is commonly used for 3-wire RTD temperature inputs but is also suited to high-resolution resistance measurements. You can individually configure each of the module's 8 channels for a
fixed range in ohms or choose from two methods of auto-ranging:

Full Auto-rangeThe module scrolls up and down the entire set of ranges and dynamically chooses the appropriate range for best resolution. Note that this channel type can result in higher latency when ranging up; the data returned is resistance in ohms.
Auto-range DownThe module scrolls down and up within the specified range limit. If the value goes above the specified range, the module issues an out-of-range value (16-bit). These channel types allow auto-ranging within the selected range but limit the data latency when ranging up. The data returned is resistance in ohms.

The GRV-IRTD-8 module does not offer channel-to-channel isolation, so make sure you use isolated RTD probes.

The GRV-IRTD-8 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-IRTD-8
Input Ranges (Ohms)	8.0 K, 4.0 K, 2.0 K, 1.0 K, 800, 400, 200, 100, 80, 40, 20, 10, and Autoranges
Accuracy (Ohms @ Range)	4.2@8 K, 2.6@4 K, 1.8@2 K, 1.4@1 K, 0.47@800, 0.31@400, 0.23@200, 0.19@100, 0.082@80, 0.066@40, 0.058@20, 0.058@10 Ohms
Excitation RMS Current (Range & Load Watts Dissipated)	>301 µA (8 K & 363 µW), (4 K & 182 µW), (2 K & 91 µW), (1 K & 46 µW), >1.84 mA (800 Ohms & 1.355 mW), (400 Ohms & 677 µW), (200 Ohms & 339 µW), (100 Ohms & 169 µW), >3.96 mA (80 Ohms & 627 µW), (40 Ohms & 313 µW), (20 Ohms & 156 µW), (10 Ohms & 78 µW)
Data Refresh Time	600 ms
Analog Data Filtering	-3 dB @ 23.5 Hz / -18 dB @ 60 Hz
Software Filtering: Simple Moving Average (SMA)	1 to 32 readings
Software Filtering: Weighted Average	1 to 4096
Step Input Response Time	600 ms x SMA value (19.2 s @ 32 SMA, Default SMA = 4)
Total Lead Resistance^¹	200 Ohms Max
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 0-3 & group 4-7. None within a group.
Number of Channels	8
Chassis Power Consumption	1.3 W
Minimum GRV-EPIC-PR1 Firmware Version	1.4.2
Minimum PAC Project Version	10.2003
Minimum Library Package for CODESYS Version	1.0.2.0
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)^a, CE, ATEX (Category 3, Zone 2), RoHS, DFARS; UKCA
Warranty	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).

1. The sum of the resistance in both lead wires cannot exceed this value. For example: a 24 AWG wire would need to be longer than 4,000 feet (or 1.2 kilometers), in each lead, to exceed 200 Ohms.

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