(USA and Canada only)
From -50 mV to +50 mVDC
From -25 mV to +25 mVDC
Maximum Over Range
(= ± 27500 counts)
2 µV from -50 mV to +50 mV
1 µV from -25 mV to +25 mV
Cold Junction Temperature Compensation
Automatic when used with SNAP brains
-3 dB @ 2.4 Hz
Input Response Time
(% of span/delta V/delta time)
63.2%/31.5 mV/66 ms
65 ms for +/- 50 mV
130 ms for +/- 25 mV
130 ms for B-, R-, S-, and T-type thermocouples
65 ms for C-, D-, G-, and N-type thermocouples
DC Common Mode Rejection
AC Common Mode Rejection
>-120 dB @ 60 Hz
Maximum Survivable Input
Common Mode Voltage
0.1% (50 µV) @ 50 mV (full scale)
0.2% (50 µV) @ 25 mV (full scale)
Drift: Gain Temperature
5 µV / °C
Drift: Offset Temperature Coefficient
2 µV / °C
Thermocouple Accuracy [°C]
After user gain and offset commands
B, R, S C, D, G T, N
±5 ±4 ±3
±3 ±2 ±2
Isolation: Channel to Channel
250 V continuous
(1500 V transient)
5 VDC (±0.15 ) @ 200 mA
100 megohms (each channel)
-20 °C to 70 °C
-40 °C to 85 °C
Torque, hold-down screws
Not to exceed 1 in-lb (0.11 N-m)
Torque, connector screws
3 in-lb (0.34 N-m)
Wire size range
22 to 14 AWG
CE, FM, RoHS, DFARS; UKCA
This document lists and describes all current Opto 22 SNAP PAC System part numbers, including PAC Project software, SNAP PAC controllers, and SNAP I/O modules of all kinds. SNAP PAC mounting racks and SNAP power supplies are also listed.
The isolated analog input modules described in this document are part of Opto 22's SNAP PAC System. They provide optical isolation, transformer isolation, and channel-to-channel isolation. This data sheet covers the following part numbers:
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.
This document is written in Chinese.
This white paper describes various temperature sensors such as RTDs, thermocouples, ICTDs, thermistors, and infrared sensors, and the Opto 22 solutions for using them.
This primer describes various temperature sensors such as RTDs, thermocouples, ICTDs, thermistors, and infrared sensors, and the Opto 22 solutions for using them.
This document is a statement of compliance with the EU Directive 2015/863/EU, Restriction of Hazardous Substances (RoHS 3). This document lists Opto 22 products that comply with the substance restrictions of the RoHS 3 directive.
This document lists all Opto 22 part numbers that have Factory Mutual (FM) approval.
This document lists all Opto 22 part numbers that have the Underwriters Laboratory (UL) approval.
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.
This CAD file includes drawings that apply to most SNAP analog and digital I/O modules.
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.
A quick overview on securing a SNAP Module to a SNAP rack.
A quick overview on removing a SNAP module.
A quick overview on I/O Solutions for temperature monitoring.
What's the difference between accuracy and resolution in analog I/O specifications? Try your own specs in the calculator.