Allen-Bradley 1756-IH16I ControlLogix Input Module
$123.00
$320.00
Description
Overview
The 1756-IH16I digital input module from Rockwell Automation Allen-Bradley is part of the ControlLogix PLC platform and is designed for high-voltage DC discrete input applications requiring electrical isolation at each point. The module features sixteen individually isolated 125V DC inputs, allowing reliable signal acquisition from independent field devices while minimizing the risk of cross-channel interference.
Its isolated channel architecture makes the module suitable for complex industrial control systems where signal integrity, electrical separation, and field-side protection are critical.
Key Features
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Sixteen individually isolated digital input channels
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Designed for 125V DC sink/source input devices
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Supports high-voltage industrial discrete signals
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Fast input response with selectable filtering
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Reduced channel-to-channel electrical interference
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Compatible with ControlLogix chassis systems
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Removable terminal block support for simplified maintenance
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Integrated diagnostic capability for field monitoring
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | 1756-IH16I |
| Brand | Allen-Bradley |
| Product Series | ControlLogix |
| Module Type | Digital Isolated Input Module |
| Input Channels | 16 Individually Isolated Inputs |
| Input Signal Type | DC Sink/Source |
| Nominal Input Voltage | 125V DC |
| Operating Voltage Range | 90–146V DC |
| Minimum Input Current | 1 mA at 90V DC |
| Maximum Input Current | 3 mA at 146V DC |
| Off-State Current | Maximum 0.8 mA |
| Input Delay Time | 6 ms plus user-selected filter time |
| Backplane Current @ 5.1V DC | 125 mA |
| Backplane Current @ 24V DC | 3 mA |
| Maximum Power Dissipation | 5 W at 60°C |
| Isolation Type | Point-to-Point Isolation |
| Compatible RTBs | 1756-TBCH, 1756-TBS6H |
| Mounting Platform | ControlLogix Chassis |
| Weight | 0.4 lbs |
Electrical Isolation Benefits
Each input point on the 1756-IH16I operates with independent isolation, which helps protect the control system from voltage fluctuations, electrical noise, and grounding issues commonly found in industrial environments. This design is especially beneficial in applications involving distributed field wiring or mixed-voltage installations.
Typical Applications
The module is commonly used in systems that require reliable high-voltage digital signal monitoring, including:
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Power distribution systems
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Process control equipment
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Turbine and generator monitoring
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Industrial motor control centers
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Manufacturing automation lines
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Substation control systems
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Heavy industrial process facilities
FAQ
What type of input signals does the 1756-IH16I support?
The module accepts 125V DC discrete input signals and supports both sink and source wiring configurations.
Why is individual point isolation important?
Individually isolated channels help prevent electrical interference between field devices and improve protection against grounding faults or voltage transients.
Which terminal blocks are compatible with this module?
The module supports the 1756-TBCH and 1756-TBS6H removable terminal blocks.
Can the module be installed in any ControlLogix chassis?
Yes. The 1756-IH16I is designed for use with standard Allen-Bradley ControlLogix chassis systems.
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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