OPT-SNAP-AITM-2

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

The SNAP-AITM-2 provides two channels of analog input with a range of -50 to +50 mV, -25 to +25 mV, or type
B,C,D,G,N,T,R, or S thermocouple. Use isolated probes for thermocouple inputs. Although the two channels are not
isolated from each other, the module is 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.
 
For a similar module offering eight channels, see SNAP-AITM-8.
 
If you need channel-to-channel isolation, see SNAP-AITM2-i.
 

Input Range	From -50 mV to +50 mVDC From -25 mV to +25 mVDC
Over-Range Limits	From -55 to +55 mV (+/-50 mV range) From -27.5 to +27.5 mV (+/-25 mV range)
Resolution	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 brains
Input Filtering	-3 dB @ 2.4 Hz
Input Response Time (% of span/delta V/delta time)	63.2%/31.5 mV/66 ms
Data Freshness (Max)	167 ms (+/-50 mV) 334 ms (+/-25 mV)
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% (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]	B, R, S	C, D, G	T, N
From factory	±5	±4	±3
After user gain and offset commands	±3	±2	±2
Isolation	1500 V
Power Requirements	5 VDC (±0.15 ) @ 170 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	FM, CE, RoHS, DFARS
Warranty	Lifetime

Rev: 04/13