The Allen-Bradley 1756-IF16H is a HART Analog I/O module that connects a Logix controller to your process. This particular input module is one of those that receive signals from process value transmitters and then convert them to their equivalent measurement values for use in the controller, i.e. flow, temperature, pressure, or pH. Part of the ControlLogix system, it has 16 differential inputs and 1 HART modem in each channel and requires an RTB, or removable terminal block housing, of either 1756-TBS6H or 1756-TBCH before it can be connected to the chassis. The 1756-IF16H allows you to choose which among the three data formats to use: analog only, analog and HART PV, and analog and HART by channel and you can do so via the Studio 5000 Logix Designer software. It is important to select the right data format to use, as it determines which values are included in the Input tag of the module and the features that are available to your application. The Analog Only format only has the analog signal values and the analog status. The Analog and HART PV is recommended when you want the members of your tag to be arranged like the non-HART analog input modules. When you choose this data format, the analog values for all channels are grouped near the end of the tag, making it easy to see all the 16 analog values at once.
Two input ranges are available for each channel in the module and these are either from 0 to 20 milliAmps and 4 to 20 milliAmps, with the latter being used by the HART instruments. These ranges designate the minimum and maximum signals that the module can detect. The module also has a module filter that attenuates the input signal beginning at the specified frequency. This is applied on a module-wide basis, affecting all channels. Note that HART instruments should not use the 1000 Hertz module filter. Real-time Sampling (RTS) is also another feature of this module. Applied module-wide, this parameter instructs the module of the frequency of scanning its input channels and obtain all available data. After scanning, the module will then multicast the data. But prior to the module configuration, you need to set the real-time sampling (RTS) period and the requested packet interval (RPI) period. It also has an under-range and over-range detection feature, which allows the module to detect when it is operating beyond the limits of the input range. This is a status indication that will tell you that the input signal is being measured inaccurately, as the signal is beyond the measuring capability of the module. Applied on a per channel basis, the module has a digital filter that smoothens out input data noise transients. Also, the module has a wire-off detection feature, which informs you when a signal wire has been disconnected from one of the channels or if configured for a 4 to 20 milliAmps range, when an RTB is removed from the module.
Repair Services for 1756-IF16H
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Our highly skilled technicians can repair your ControlLogix 1756-IF16H. All our repairs come with a 1 Year Warranty. Please contact us for additional information about our repair process.
Revisions for 1756-IF16H
Please refer to the manual for more information about the 1756-IF16H such as the wiring diagrams, data sheets,
firmware information and migration or obsolescence details.
|Revision Part #
||Also Known as
||1756-IF16H/A, Series A, Rev A