PRODUCT INFORMATION
Product Overview
Revision scope: These specifications describe 1756-IA16/A (Series A). Check the corresponding technical data before specifying another hardware series.
The Allen-Bradley 1756-IA16 ControlLogix AC Input Module provides 16 digital input points. It occupies one ControlLogix chassis slot. The module accepts nominal 120V AC input signals arranged across two isolated groups. Hardware Series A provides software-configurable input filter times, input time stamping, and cyclic updates.
This module features basic continuous isolation of 125V between input groups and backplane circuits. Backplane current draw is 100 mA at 5.1V DC and 2 mA at 24V DC. Total backplane power consumption is 0.58 W. Maximum power dissipation reaches 5.8 W at 60 °C. Front status indicators provide immediate visual confirmation of field input operation.
TECHNICAL DATA
Technical Specifications
These specifications describe 1756-IA16/A (Series A). Check the corresponding technical data before specifying another hardware series.
| Parameter | Specification |
|---|
| Number of Inputs | 16 points (8 points per group) |
|---|
| Nominal Input Voltage | 120V AC (50/60 Hz) |
|---|
| Operating Voltage Range | 74–132V AC, 47–63 Hz |
|---|
| Backplane Current @ 5.1V DC | 100 mA |
|---|
| Backplane Current @ 24V DC | 2 mA |
|---|
| Total Backplane Power | 0.58 W |
|---|
| Maximum Power Dissipation | 5.8 W @ 60 °C (140 °F) |
|---|
| Thermal Dissipation | 18.41 BTU/hr |
|---|
| Off-State Voltage (Max) | 20V AC |
|---|
| Off-State Current (Max) | 2.5 mA |
|---|
| On-State Current | 5 mA min @ 74V AC, 13 mA max @ 132V AC |
|---|
| Input Impedance | 10.15 kΩ max @ 132V AC, 60 Hz |
|---|
| Continuous Isolation Voltage | 125V (continuous), basic insulation |
|---|
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
|---|
| Operating Humidity | 5% to 95% non-condensing |
|---|
| Slot Width | 1 slot |
|---|
TECHNICAL INFORMATION
Order Information
| Revision Part # | Also known as | Reference Price |
|---|
| 1756-IA16 Ser A | 1756-IA16/A, Series A | USD 129.00–279.00, indicative |
Reference prices are observed third-party market prices for the stated revision, not a final Aituos quotation.
TECHNICAL INFORMATION
Features
- Provides 16 digital input points organized into two isolated groups of 8 points.
- Operates over an input range of 74 to 132V AC at 47 to 63 Hz.
- Features user-selectable hardware filter times for off-to-on and on-to-off transitions.
- Supports change-of-state detection and input time stamping to within ±200 µs.
- Delivers 125V continuous basic isolation between signal inputs and backplane circuitry.
- Installs into a single standard slot within any ControlLogix I/O chassis.
TECHNICAL INFORMATION
Applications
- Discrete 120V AC limit switch and proximity sensor monitoring.
- Motor starter auxiliary contact and control circuit feedback sensing.
- Pushbutton and selector switch monitoring in industrial control panels.
- General factory automation discrete AC signal aggregation.
TECHNICAL INFORMATION
Connections / Interfaces
- Compatible with 20-pin Removable Terminal Block housings 1756-TBNH and 1756-TBSH.
- Connects directly to the ControlLogix 1756 chassis backplane bus.
- Supports user-defined mechanical keying on the removable terminal block.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into any available slot in a ControlLogix chassis until firmly seated.
- Wire field signals to the 20-pin removable terminal block before installing onto the module.
- Follow Category 1 conductor routing guidelines to prevent electrical noise interference.
- Maintain ambient operating temperatures between 0 °C and 60 °C.
TECHNICAL INFORMATION
Configuration Guidelines
- Select off-to-on input filter delay times of 1 ms or 2 ms.
- Set on-to-off filter delays to 9 ms or 18 ms for debounce control.
- Configure electronic keying parameters within the controller programming software.
TECHNICAL INFORMATION
Compatibility
- Installs directly into all Allen-Bradley ControlLogix 1756 I/O chassis slots.
- Requires 1756-TBNH or 1756-TBSH removable terminal blocks for field connections.
TECHNICAL INFORMATION
Compliance and Certifications
- cULus Listed Industrial Control Equipment certified under UL File E65584
- UL Listed for Class I, Division 2 Groups A, B, C, D Hazardous Locations
- CE Marked compliant with EN 61326-1, EN 61000-6-2, EN 61000-6-4, and EN 61131-2
- FM Approved for Class I, Division 2 Groups A, B, C, D Hazardous Locations
- Compliant with UKCA, RCM, KC, and Morocco regulatory standards
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSInstalls directly into all Allen-Bradley ControlLogix 1756 I/O chassis slots. Requires 1756-TBNH or 1756-TBSH removable terminal blocks for field connections.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the operating voltage range for the 1756-IA16/A module?
The operating voltage range is 74 to 132V AC at 47 to 63 Hz. Nominal voltage is 120V AC.
Which terminal blocks work with the Allen-Bradley 1756-IA16 Series A?
Field wiring connects using 20-pin removable terminal block housings. Compatible models include 1756-TBNH screw clamp and 1756-TBSH spring clamp blocks.
What is the market reference price for the 1756-IA16/A module?
Observed market reference pricing spans approximately $129.00 to $279.00 USD across conditions. These figures are indicative market reference pricing only and are not a final quotation.
