Product Specification
| Manufacturer | Allen Bradley | 1756-IF16H |
| Part Number | 1756-IF16H | AB 1756-IF16H |
| Product Type | HART Analog Input Module | AB Analog Input Module |
| Inputs/Outputs | 16 differential current inputs, HART interface | AB ControlLogix |
| Range | 0…20 mA, 4…20 mA | Allen Bradley PLC |
| Resolution | 16…21 bits | 1756-IF16H |
| Dimensions | 6.0" x 6.0" x 1.5"(15.2 cm x 15.2 cm x 3.8 cm) | AB 1756-IF16H |
1756-IF16H Physical Features
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| Item | Description |
| 1 | Backplane connector - Connects the module to the ControlBus™ backplane. |
| 2 | Connector pins - Input/output, power, and ground connections are made through these pins with the use of an RTB (removable terminal block) or IFM (interface module). |
| 3 | Locking tab - Anchors the RTB or IFM cable on the module, which helps to maintain wire connections. |
| 4 | Slots for keying - Mechanically key the RTB to help prevent inadvertently making the wrong wire connections to the module. |
| 5 | Status indicators - Display the status of communication, module health, and input and output devices. Use these indicators to help in troubleshooting. Some modules offer calibration and module status-only indicator LEDs, whereas other modules offer additional per-channel status and fault indicator LEDs. |
| 6 | Top and bottom guides - Help to seat the RTB or IFM cable onto the module. |
Product Details
The 1756-IF16H is an analog input/output module manufactured by Allen-Bradley. The 1756-IF16H HART analog input module has three data formats: analog only, analog and HART PV, and analog and HART by channel. It has 2 input ranges: 0 to 20 mA and 4 to 20 mA. Other features include a module filter, real-time sampling (RTS), under range and over range detection, wire-off detection, and highway addressable remote transducer (HART) communication. The module filter reduces the frequency of the input signal on a module-wide basis.
It does so by around -3 dB or 0.707 of the applied amplitude. The module gets instructions for how often to scan the input channels through the RTS and this also happens on a module-wide basis.
A useful function of the 1756-IF16H module is the under range and over range detection system through which it lets the module know if it is operating outside the limits of the input range. The digital filter feature smoothes out the variations of the input noise and it does so on a per channel basis.
When a wire-off condition occurs, 2 things happen - input data for that channel changes to the scaled value that corresponds to the under-range condition, and a fault bit is set in the input tag which can indicate the presence of a wire-off condition. The 1756-IF16H module carries out fault and status reporting by sending the data to the controller with its channel data. The sent data is arranged in a way so that the user can easily pick out how minutely the fault conditions should be examined. There are three levels of tags which work together to provide this level of accuracy.
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Product Images
AB 1756-IF16H
AB 1756-IF16H
AB 1756-IF16H
AB 1756-IF16H
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