Allen-Bradley

Allen-Bradley 1756-OW16I ControlLogix 16-Point Isolated Relay Contact Output Module

SKU 1756-OW16I

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: Allen-Bradley

  • Product No.: 1756-OW16I

  • Country of origin:United States

  • Product Type: Discrete Output Module

  • Payment: T/T, Western Union

  • Weight: 350g

  • Dimensions: 14.5 x 11.2 x 3.5 cm

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

The Allen-Bradley 1756-OW16I is a ControlLogix discrete relay output module designed to interface industrial controllers with high-capacity AC and DC loads. As part of the modular ControlLogix architecture, this unit features 16 normally open, individually isolated relay output points capable of handling flexible voltage ranges from 5 to 125VDC and 10 to 240VAC. The module supports scheduled outputs and configurable fault states including Hold Last State, User-Defined On, and User-Defined Off, providing robust control state management during controller communication faults or system transitions.

Engineered for demanding industrial environments, the 1756-OW16I mounts directly into any ControlLogix chassis and interfaces with field wiring via a removable terminal block (RTB). The isolated channel architecture allows multiple power sources and differing voltage potentials to be switched across the same physical module without cross-circuit interference. Backplane power is efficiently managed, drawing 150mA from the 5.1VDC and 24VDC rails, while robust mechanical relays ensure reliable isolation between high-power field devices and low-voltage controller backplanes.

Features

  • 16 individually isolated dry contact relay output points for multi-voltage flexibility
  • Wide operating voltage range supporting 5 to 125VDC and 10 to 240VAC
  • Configurable fault-mode behavior including Hold Last State and default Off-state options
  • Supports scheduled output execution synchronized with system time
  • Compatible with standard ControlLogix 1756 removable terminal blocks (RTBs)
  • C300 and R150 pilot duty ratings for inductive load handling

Applications

  • Switching mixed AC and DC actuator loads within a single chassis slot
  • Interfacing controller logic with high-current motor starters and solenoids
  • Isolating control system outputs from hazardous or noisy field power supplies
  • Managing safety-interlock relay chains and alarm annunciation circuits
  • Executing scheduled discrete control actions in continuous process automation

Technical Specifications

Technical Parameter Specification
Module Type Isolated Relay Contact Output Module
Number of Outputs 16 normally open, isolated points
Operating Voltage Range 5 to 125VDC, 10 to 240VAC
Current Rating per Point 1A at 5 to 30VDC; 0.5A at 48VDC; 0.22A at 125VDC; 1.5A at 120VAC; 0.75A at 240VAC
Minimum Load Current 10mA per point
Backplane Current Draw 150mA at 5.1VDC; 150mA at 24VDC
Total Backplane Power 4.4W
Thermal Dissipation 4.5W max at 60 degC (140 degF) / 15.35 BTU/hr
Output Delay Time 10ms max (Off to On / On to Off)
Switching Frequency 1 operation every 3 seconds max at rated load (0.3 Hz)
Isolation Voltage 250V reinforced insulation (tested at 1350VAC for 2s)
Slot Width 1 Standard ControlLogix Slot
Enclosure Type Open Style
Country of Origin United States

Compliance and Certifications

  • UL Listed Industrial Control Equipment
  • CSA Certified for Hazardous Locations (Class I, Division 2)
  • CE Marked for applicable EU directives
  • C-Tick compliant for Australian market

FAQ

What is the primary function of the Allen-Bradley 1756-OW16I?

The 1756-OW16I is a 16-point discrete relay output module for ControlLogix systems, designed to switch high-capacity AC and DC field loads with complete channel-to-channel or group isolation.

What voltages can the 1756-OW16I module switch?

The module supports a wide operating voltage range, accommodating 5 to 125VDC as well as 10 to 240VAC loads, depending on the current rating of the connected device.

Does the 1756-OW16I require a removable terminal block?

Yes, field wiring connects to the module through a removable terminal block (RTB) attached to the front of the unit, allowing for easy replacement without disturbing field wiring.

How many chassis slots does this module occupy?

The 1756-OW16I occupies a single standard slot in any Allen-Bradley ControlLogix I/O chassis.

View all FAQs →

Quantity
Shipping & Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
Reviews
1 of 1
Only 11 item(s) left in stock
Quantity
View full details

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
United States

Technical knowledge

Derivative Action in PID Control Without Noise Problems

Learn what derivative action contributes to a PID loop, why it can amplify measurement noise and setpoint changes, and how filtering, sampling, and staged tests make D tuning safer.

Designing Industrial Networks That Stay Troubleshootable

A practical guide to segmenting, documenting, and testing industrial Ethernet networks so plant teams can isolate faults quickly, control change, and expand without creating fragile dependencies.

Commissioning IO-Link From Master Ports to IODD Data

Commission IO-Link systematically from master addressing and port modes through IODD selection, PLC byte mapping, parameter backups, device validation, and failure-injection tests.

PowerFlex Dynamic Braking Resistor Design and Testing

A practical PowerFlex braking guide covering regenerative energy, resistor resistance and duty cycle, thermal protection, model-specific parameters, and measured commissioning tests.

Engineering Industrial Joystick Controls for Safe Motion

An industrial joystick is only the first element in a safe motion command chain. This guide covers sensing choices, wiring, signal validation, PLC logic, restart behavior, and commissioning for...

Seeing PID Behavior Before Tuning the Loop

PID tuning becomes safer when engineers can see how proportional, integral, and derivative actions reshape error, output, and response over time. This guide turns live trends into a disciplined...