SNAP-AIRTD-8U

$539.00 (USA and Canada only)

Availability: In stock
SNAP 8-Ch Multifunction RTD/Resistance Analog Temperature Input Module

Please call (800) 321-6786 to order.

SNAP-AIRTD-8U

Production Specification

The SNAP-AIRTD-8U analog input 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. It features open circuit detection if any wire breaks.

You can individually configure each of the module's 8 points for a variety of behaviors, including a fixed temperature range for nickel, platinum, or copper RTD inputs; a fixed range in ohms; or two types of auto-ranging where the module scrolls within a range (in ohms) and chooses the best resolution.

The SNAP-AIRTD-8U has a plug-in terminal on top with spring-clamp connectors for easy wiring. An insertion tool is provided in the box with the module.

All 8 inputs share the same reference terminal. Make sure you use isolated RTD probes.

The SNAP-AIRTD-8U requires a SNAP PAC brain or R-series controller with firmware R9.5a or higher. The module cannot be used with legacy brains or controllers.

 

SNAP-AIRTD-8U

3-wire RTD input and maximum temperature table range (actual range depends on your probe)

1000 ohm platinum @ 0 °C α= 0.00385
Range: -200 to 850 °C
(-328 to 1,582 °F)

100 ohm platinum @ 0 °C
α= 0.00385
Range: -200 °C to 850 °C
(-328 to 1,582 °F)

10 ohm copper @ 25 °C
α= 0.00427
Range: -60 to 355 °C
(-76 to 671 °F)

1000 ohm nickel @ 0 °C
α= 0.00618
Range: -60 to 170 °C
(-76 to 356 °F)

100 ohm nickel @ 0 °C
α= 0.00618
Range: -60 to 250 °C
(-76 to 482 °F)

1000 ohm nickel @ 70 °F
α= 0.00637
Range: -46 to 148.9 °C
(-50 to 300 °F)

120 ohm nickel @ 0 °C
α= 0.00672
Range: -80 to 260 °C
(-112 to 500 °F)

Input Range

0 to 4000 ohms

0 to 400 ohms

0 to 40 ohms

Accuracy
 From factory
 After setting gain and offset

 

0.8 °C (Pt); 0.6 °C (Ni)
0.6 °C (Pt); 0.4 °C (Ni)

 

0.8 °C (Pt); 0.6 °C (Ni)
0.6 °C (Pt); 0.4 °C (Ni)

 

1.7 °C
1.2 °C

Excitation Current

0.325 mA

2 mA

4.28 mA

Over-Range Limit

10% overrange for all measurements in ohms

Resolution
 In Ohms
 In RTD Temperature

 

The greater of: (Ohms Range / 100,000) or 1 milliohm

Better than or equal to 0.05 °C (0.09 °F)

Input Filtering
 Front end filtering
 DSP Notch filter

 

-15 dB @ 50 Hz, -20 dB @ 60 Hz

20 Hz (-3 DdB = 5.24 Hz)

Data Freshness (Max)

1.2 s

Auto-range Settle Time

 Step change from 10 to 8000

 Step change from 8000 to 10

1.2 s to the next higher or lower range

<= 10 s ranging up (channel may show overrange until settled)

<= 10 s ranging down (channel will give a reading while settling)

Total Lead Resistance

200 ohms maximum

DC Common Mode Rejection

>-120 dB

AC Common Mode Rejection

>-120 dB at 60 Hz

Maximum Survivable Fault Voltage at Input (between any 2 field wires)

±8 V

Maximum Operating Common Mode Voltage

250 V field terminal to logic connector

Isolation

1500 V field side to logic side

Power Requirements

5.00 to 5.20 VDC @ 135 mA

Operating Temperature

-20 °C to 70 °C

Storage Temperature

-40 °C to 85 °C

Maximum wire size

20 AWG

Torque, hold-down screws

4 in-lb (0.45 N-m)

Agency Approvals

UL, CE, RoHS, DFARS

Warranty

Lifetime

SNAP Analog Input Modules Data Sheet

SNAP I/O analog input modules are part of Opto 22's SNAP PAC System. This document includes descriptions, specifications, and wiring and dimensional diagrams for most analog input modules.

For analog modules with channel-to-channel isolation, see form #1182.

Declaration of Conformity (EMC, LVD, RoHS)

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.

Opto 22 RoHS 2 Statement of Compliance - Restriction of Hazardous Substances

This document is a statement of compliance with the EU Directive 2011/65/EU, Restriction of Hazardous Substances (RoHS 2). This document lists Opto 22 products that comply with the substance restrictions of the RoHS2 directive.

UL Approval Document

This document lists all Opto 22 part numbers that have the Underwriters Laboratory (UL) approval.

CE Declaration: EMC

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

CE Declaration: Low Voltage

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

No downloads are available for this product.

Video: SNAP PAC System Overview

This overview describes the four integrated components of the SNAP PAC system: software, controllers, brains and I/O. This hardware and software system is designed for industrial control, remote monitoring and data acquisition.

Video: Spring Clamps - Quick Tip

A quick tip on spring clamps.