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1771-TCM
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Other Available Revisions for the 1771-TCM 1771-TCM//A1771-TCM//B1771-TCM//C
Common misspellings:
- l771-TCM
- 177l-TCM
- 1771TCM
The Allen-Bradley 1771-TCM is the temperature control module which uses a thermocouple-based temperature sensor for the PLC-5 systems it works with. The 1771-TCM module is designed to provide 8 separate loops for temperature control. The module carries out PIC and TAP algorithms for each of the 8 analog inputs. The subsequent output of the 1771-TCM module is processed by the PLC ladder logic before an output is sent via an output module. The auto-tuning feature of the module is supported. The module needs to be calibrated once every six months. The analog-to-digital resolution offered by the module is 16-bits or 15 bits-plus-sign-bit.
The 1771-TCM can be installed in any slot in the 1771 I/O chassis. The Series A module draws a maximum of 1.1 Amps in a steady-state condition whereas the series B, C, and D modules draw 1.0 Amps. At system startup, the series A module draws 1.5 Amps whereas the series B, C, and D modules draw 1.0 Amps. Two types of cable are available for connecting the module with termination panels: the 1771-NC6 cable (6 feet in length) and the 1771-NC15 cable (15 feet in length). Static discharge precautions should be followed when removing/installing the module or when connecting the module with terminal panels via associated cables. The following thermocouple types are available for different temperature range requirements: Type B for 572 to 3272 degrees Fahrenheit, Type E for -454 to 1822, Type J for -346 to 2192, Type K for -454 to 2502, Type R for -58 to 3214, Type S for -58 to 3214 and Type T for -454 to 752 degrees Fahrenheit. The module supports a thermocouple input from one of the above-mentioned thermocouple types or a ±100 millivolt input for each PID loop. The working temperature range for the 1771-TCM is 32 to 140 degrees Fahrenheit whereas the storage temperature range is -40 to 185 degrees Fahrenheit. The module requires 5 to 95% relative humidity for optimal operation. The module weighs 0.8 kilograms.
Technical Specifications for 1771-TCM
| Manufacturer | Allen-Bradley / Rockwell Automation |
|---|---|
| Series | PLC 5 |
| Part Number | 1771-TCM |
| Product Type | Temperature Control Module |
| Calibration Interval | 6 months first, then yearly |
| I/O Chassis Location | Any I/O module slot |
| A/D Resolution | 16 bits or 15 bits plus sign |
| Input Filtering | 6-pole low-pass hardware filter |
| Operating Temperature | 32 to 140 degrees Fahrenheit |
| Storage Temperature | -40 to 185 degrees Fahrenheit |
About 1771-TCM
The 1771-TCM module is a PLC 5 temperature control module that has been designed by Allen-Bradley. This module has been enhanced and it includes different features such as an autotune feature through which errors can be reported as warnings rather than faults and the anti-repeat windup feature that is faster and more active than the same option in regular modules. The Allen-Bradley 1771-TCM temperature control module comes with 8 individually isolated loops and the module can be mounted in any slot of the I/O chassis. The A/D resolution of this module goes from 15 and 16 bits plus sign. It comes with a calibration interval of 6 months for the first time and then yearly afterwards.
The Allen-Bradley PLC 5 1771-TCM temperature control module is able to withstand 1000 Volts DC continuous between input channels and between the input and backplane connections. This module is tested initially at 1200 Volts DC for 1 second. This test was performed between the input channels and the backplane connections. The Allen-Bradley 1771-TCM temperature control module needs to be installed in a clean and climate-controlled space where the ideal operating conditions are constantly maintained. The operating temperature range is from 0 to 60 degrees Celsius and the humidity levels (without condensation) can go from 5 to 95 percent. If there are ambient temperature changes where the temperature increases at a rated greater than 0.5 degrees Celsius per minute, the performance of the module might be affected.
