Allen-Bradley 1756-IF16H/A ControlLogix Analog Input Module with HART
$123.00
$320.00
Description
Allen-Bradley 1756-IF16H/A ControlLogix Analog Input Module with HART
The Allen-Bradley 1756-IF16H/A, also cataloged as the 1756-IF16H/A analog input module, operates as a dedicated hardware component for acquisition and HART digital overlay of analog process signals within ControlLogix I/O backplane systems. The module executes 16-channel differential voltage/current conversion with per-channel HART modem access over shared analog wiring.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-IF16H/A |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1 lbs |
| Power Consumption | 4.02 W total backplane power |
| Number of Inputs | 16 differential analog channels |
| Signal Types | 0-20 mA, 4-20 mA, ±10 V, 0-10 V, 0-5 V, 1-5 V |
| Resolution | 16–21 bits |
| Accuracy | ±0.1% full scale |
| Backplane Current | 200 mA at 5.1 VDC; 125 mA at 24 VDC |
| Isolation | 50 V continuous channel-to-backplane |
| HART Scan Time | ~1 s (all channels HART enabled) |
| Input Scan Time | 11–328 ms (filter dependent) |
| Input Impedance | Voltage >1 MΩ; Current 250 Ω |
| Connector | 1756-TBCH / 1756-TBS6H RTB |
| Enclosure | Open style |
ControlLogix Backplane and HART Communication Architecture
The module integrates into the ControlLogix backplane via deterministic I/O scheduling, where analog conversion results and HART frames are multiplexed across the same channel structure. Each input channel includes a dedicated HART modem path allowing simultaneous analog measurement and digital field device communication without external multiplexing hardware.
Backplane bus execution follows cyclic scan scheduling with variable update segmentation based on configured filter time and channel count allocation. HART overlay traffic introduces additional scan latency when all channels are enabled, reflected in the ~1 s full-channel HART interrogation cycle.
Channel-to-backplane isolation architecture is implemented at 50 V continuous rating, separating field wiring domain from ControlLogix chassis logic domain.
Frequently Asked Questions (FAQ)
Q: Can the module perform simultaneous analog conversion and HART communication on all channels?
A: Yes. Each channel supports a dedicated HART modem path; however, full-channel HART polling increases total scan time to approximately 1 s.
Q: What happens to backplane load during high-speed update mode?
A: Backplane current consumption remains within 200 mA at 5.1 VDC, but scan segmentation reduces active channel concurrency depending on configuration.
Q: Is channel-to-channel isolation available?
A: No. Isolation is implemented between channels and backplane only; channels share grouped architecture for analog input domain.
Field Installation Guidelines
The module shall be inserted into a compatible ControlLogix chassis slot with power removed. RTB (1756-TBCH or 1756-TBS6H) must be fully seated prior to energizing the backplane.
Shield termination should be executed at a single-point ground reference within the cabinet to prevent ground loop formation across analog current loops (4-20 mA). Maintain separation between analog signal wiring and backplane power conductors to reduce coupling noise into high-resolution ADC stages.
Ensure torque compliance on RTB terminal screws according to ControlLogix installation practice to maintain stable low-impedance field connections.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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