OPT-SNAP-AITM2-i

SNAP-AITM2-i SNAP 2-Ch Isolated Type B,C,D,G,N,T,R, or S Thermocouple Analog Input Module

The SNAP-AITM2-i provides two isolated channels, each with an input range of -50 to +50 mV, -25 to +25 mV, or type
B,C,D,G,N,T,R, or S thermocouple. In addition to having two channels isolated from each other, the module is also
transformer isolated and optically isolated from other modules and devices.
 
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.
 

Input Range	From -50 mV to +50 mVDC From -25 mV to +25 mVDC
Maximum Over Range	± 10% (= ± 27500 counts)
Resolution	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
Input Filtering	-3 dB @ 2.4 Hz
Input Response Time (% of span/delta V/delta time)	63.2%/31.5 mV/66 ms
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	0.1% (50 µV) @ 50 mV (full scale) 0.2% (50 µV) @ 25 mV (full scale)
DRIFT: Gain Temperature Coefficient	5 µV / °C
DRIFT: Offset Temperature Coefficient	2 µV / °C
Thermocouple Accuracy [°C]	B, R, S	C, D, G	T, N
From factory	±5	±4	±3
After user gain and offset commands	±3	±2	±2
Isolation: Optical	4000 V
Isolation: Transformer	1500 V
Isolation: Channel to Channel	250 V continuous (1500 V transient)
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	CE, FM, RoHS, DFARS
Warranty	Lifetime