OPT-SNAP-AITM-8

SNAP-AITM-8 SNAP 8-Ch Type B, C, D, E, G, J, K, N, R, S, or T Thermocouple or +/-75, +/-50, or +/-25 mV Analog Input Module

The SNAP-AITM-8 provides eight channels of thermocouple or millivolt input. Each channel can be individually configured
to accept a type B, C, D, E, G, J, K, N, R, S, or T thermocouple or a -75 to + 75 mV, -50 to +50 mV, or -25 to +25 mV
input.
 
Part of the SNAP PAC System, the module mounts on a SNAP PAC rack with a SNAP PAC brain or rack-mounted
controller. Analog, digital, and serial I/O modules can all be on the same rack. Such an I/O unit is also well suited for PC-
based control or for use as intelligent remote I/O for an Allen-Bradley RSLogix PLC system, such as ControlLogix,
MicroLogix, or CompactLogix.
 
Used with an Opto 22 SNAP PAC controller, the SNAP-AITM-8 module is ideal for customers with applications requiring
high-resolution temperature monitoring, data acquisition, and control of autoclaves, industrial ovens, pasteurizers, heat
exchangers, and other equipment that requires precise thermal regulation. The high density of points on the module
reduces panel space for applications using a high number of thermocouple inputs, such as semiconductor, food,
petrochemical, and pharmaceutical processing.
 
Compatibility: The SNAP-AITM-8 works with SNAP PAC brains and R-series controllers only. Like all SNAP analog input
modules, the SNAP-AITM-8 provides transformer isolation to reduce noise and installation problems, and 4000 volts
optical isolation (4000 volts of transient protection for 1 ms) from other modules on the same mounting rack.
 
The SNAP-AITM-8 is UL and CE approved. If you need Factory Mutual approval, see the SNAP-AITM-8-FM instead.
 
NOTE: This module does not provide channel-to-channel isolation. If you need an isolated module, see the SNAP-AITM-i.
 

Input Range	From -75 mV to +75 mV From -50 mV to +50 mV From -25 mV to +25 mV
Over-Range Limits	From -82.5 to +82.5 mV (+/-75 mV range) From -55 to +55 mV (+/-50 mV range) From -27.5 to +27.5 mV (+/-25 mV range)
Resolution	3 microvolts from -75 mV to +75 mV 2 microvolts from -50 mV to +50 mV 1 microvolts from -25 mV to +25 mV
Cold Junction Temperature Compensation	Automatic when used with SNAP I/O processors
Input Filtering	-3 dB @ 5 Hz
Data Freshness (Max)	2.25 s
DC Common Mode Rejection	>-120 dB
AC Common Mode Rejection	>-120 dB @ 60 Hz
Maximum Survivable Input	±15 volts
Maximum Operating Common Mode Voltage	250 V
Accuracy at Full Scale	0.1% (75 microvolts) @ 75 mV 0.1% (50 microvolts) @ 50 mV 0.2% (50 microvolts) @ 25 mV
DRIFT: Gain Temperature Coefficient	5 microvolts / °C
DRIFT: Offset Temperature Coefficient	2 microvolts / °C
Thermocouple Accuracy [°C]	E, J, K	B, R, S	C, D, G	T, N
From factory	±2.0	±5	±4	±3
After user gain and offset commands	±0.5	±3	±2	±2
Isolation	1500 V
Power Requirements	5 VDC (±0.15 ) @ 200 mA
Input Resistance	100 Megohms (each channel)
Ambient Temperature:   Operating   Storage	0 °C to 70 °C -25 °C to 85 °C
Torque, hold-down screws	4 in-lb (0.45 N-m)
Torque, connector screws	3 in-lb (0.34 N-m)
Agency Approvals	SNAP-AITM-8: UL, CE, RoHS, DFARS SNAP-AITM-8-FM: FM, CE, RoHS, DFARS
Warranty	Lifetime