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The 1771-NT2 input module is a thermocouple type of input module with 8 channels. It has been designed and manufactured by Allen-Bradley in the PLC 5 product line. The 1771-NT2 thermocouple input module supports thermocouple inputs that are Type B, E, J, K, R, S, and T thermocouple inputs, and it also supports Type C and Type N thermocouple inputs, which not every PLC 5 thermocouple input module can support. This input module is open-type equipment, which means that it does not have a protective enclosure. The 1771-NT2 thermocouple input module should not be used at temperatures higher than 60 degrees Celsius or at non-condensing relative humidity levels higher than 95%.
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| Manufacturer | Allen Bradley |
|---|---|
| Category | PLCs |
| Product Line | PLC 5 |
| Part Number | 1771-NT2 |
| UPC | 612598123339 |
| Weight | 1.75 lbs (0.79 kg) |
| Module Type | N-Series Analog I/O Module |
| Number of Inputs | 8 Inputs |
| Input Types | TC/Milivolt |
| Input Resolution | -5/+55 Milivolts (0.95 Microvolt/bit); B, R, S, Thermocouple (0.03 Celsius/bit, 0.06 Milivolt/bit); E, J, K, T, Thermocouple (0.1 Celsius/bit, 0.2 Fahrenheit/bit); C Thermocouple (0.07 Celsius/bit, 0.1 Fahrenheit/bit); N Thermocouple (0.03 Celsius/bit, 0. |
| Number of Outputs | 0 Outputs |
| Output Type | N/A |
| Output Resolution | N/A |
| RTP Choice | 1771-RTP1 |
| Backplane Current | 1.5 Amperes |
| Data Format | BDC or Natural Binary |
| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
| Typical DC Signal Delay (Off) | 50 ms |
| Wiring Arm | 1771-WH |
| Mounting | Rack Mountable |
The Allen Bradley High-resolution Isolated Analog Module 1771-NT2 has 0.01% typical accuracy based on 65,000 count capability over Full Scale Range (FSR). This module has programmable reset values for outputs; it selects the best reset value specified by the application requirements, with each channel being configured independently. The 1771-NT2 was designed for demanding applications including process control; it has a 16-bit resolution, an Input Bandwidth of 9 Hertz, and a maximum update time of  25 milliseconds.
The 1771-NT2 has an underrange threshold of -5.5 mV while its overrange threshold is +56.0 mV. Its normal mode rejection  is (50/60 Hertz) of 50dB/60dB (minimum) with a common mode rejection at (60 Hertz) of 150dB (typical). Dissipating power at 5 Volts of 5 Watts, its maximum backplane current is 1 A.
The relative humidity of this unit is generally between 5% and 95% without condensation; its operating temperature usually lies between 0 and 60 degrees Celsius (32 to 140 degrees Fahrenheit) while its nonoperating temperature hangs between -40 and 85 degrees Celsius (-40 to 185 degrees Fahrenheit).
The 1771-NT2 is manufactured as open type equipment: its expected use is in an industrial environment no greater than Pollution 2 (as defined in EN / IEC0664-1) when applied in a Zone 2 environment, and its enclosure should be accessible only by means of the appliance. It is advisable to use IOCONFIG to configure this module.
| Revision Part # | Also known as | |
|---|---|---|
| 1771-NT2 Ser A | 1771-NT2/A, Series A, Rev A | |
| 1771-NT2 Ser B | 1771-NT2/B, Series B, Rev B | |
| 1771-NT2 Ser C | 1771-NT2/C, Series C, Rev C | |
| Don't see your particular revision? Contact us now. | ||
Allen Bradley PLC 5 N-Series Analog I/O Module, 8 Inputs, 0 Outputs, 1.5 Amperes Backplane Current, BDC or Natural Binary Data Format